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Merge pull request '代码' (#17 ) from 代码 into master
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14 changed files with 4173 additions and 6 deletions
--- a/README.md
+++ b/README.md
@ -1,2 +1,650 @@
-# test2
+# 图书管理系统
 2023年5月21日
 成员1：王昊  成员2：孙艺哲  成员3：张江楠  成员4：郭佳慧
 ## 项目简介
 本系统是程序设计与问题求解课程设计项目，实现了图书管理 CSV 格式数据文件的读取和保存，以及数据的增删改查（CRUD）等功能。项目采用 C 语言编程实现，在 VS Code 集成开发环境（IDE）中用 GCC 进行编译。系统采用模块化设计，程序结构清晰，采用菜单驱动的命令行界面，操作便捷，能够用 CSV 格式读取和保存数据，通用性强，能够用图表展示数据，直观清楚。
 下载地址：https://bdgit.educoder.net/mac76tib2/libray.git
 项目开发过程中采用 Kanban（看板）进行任务管理和分工协作，并使用 Git 对程序代码和文档进行版本管理。任务分工情况如下：
 | 任务 | 设计 | 开发 | 测试 | 文档 |
 |------|-----|------|------|-----|
 | C1 | 王昊 | 王昊 | 张江楠 | 郭佳慧 |
 | C2·C3·C4·C5 | 张江楠 | 张江楠 | 郭佳慧 | 孙艺哲 |
 | C6·C7·C8·C9 | 郭佳慧 | 郭佳慧 | 孙艺哲 | 王昊 |
 | C10·C11·C12 | 孙艺哲 | 孙艺哲 | 王昊 | 张江楠 |
 每个成员工作量（百分比）：
 | 王昊 | 张江楠 | 郭佳慧 | 孙艺哲 |
 |----|---|----|----|
 | 25 | 25 | 25 | 25 |
 ## 关于图书管理系统
 建立一个图书馆管理系统,可以处理以下对象：
 （1）图书馆基本信息
 （2）图书馆的书籍
 （3）图书馆管理员 
 （4）读者信息
 ### 需求分析
 （1）查询图书馆的总信息
 （2）查询图书馆藏书信息
 （3）存入新书
 （4）旧书处理
 （5）根据书名检索书刊信息
 （6）查询读者的借阅信息
 （7）查询读者信息
 （8）读者借书
 （9）读者还书
 （10）文件保存
 （11）从文件读取
 ## C1：函数模块
 1.函数原形：int main();
 2.功能：调用ShowMainMenu()函数，显示主界面
 ```
 void ShowMainMenu()
 {
 	system("cls");
 	printf("\n\n\n\n\n");
 	printf("\t|----------------------欢迎进入---------------------------\n");
 	printf("\t|                    读者管理系统                              \n");
 	printf("\t|                  1、查询图书馆的总信息                         \n");
 	printf("\t|                  2、查询图书馆藏书信息                          \n");
 	printf("\t|                  3、存入新书                                  \n");
 	printf("\t|                  4、旧书处理                                  \n");
 	printf("\t|                  5、根据书名检索书刊信息                        \n");
 	printf("\t|                  6、查询读者的借阅信息                         \n");
 	printf("\t|                  7、查询读者信息                              \n");
 	printf("\t|                  8、读者借书                                 \n");
 	printf("\t|                  9、读者还书                                 \n");
 	printf("\t|                  10、文件保存                                 \n");
 	printf("\t|                  11、从文件读取                                \n");
 	printf("\t|                  0、退出                                     \n");
 	printf("\t|---------------------------------------------------------\n");
 	printf("新打开程序需先添加管理员\n");
 	printf("\n");
 	printf("\t\t请选择（0-11）：");
 }
 ```
 ## C2：查询图书馆信息模块
 函数原形：void ShowLibInfo(const Book* book, const Reader* reader);
 功能：接受两个形参，分别是图书的链表地址，读者的链表地址，并遍历两个链表，显示出图书的数量和读者的数量
 ```
 void ShowLibInfo(const Book* book1, const Reader* reader1)
 {
    Book* book = book1;
    Reader* reader = reader1;
    int bookNUm = 0, readerNUm = 0, mangerNUm = 0;
    while (book != NULL)
    {
        bookNUm++;
        book = book->next;
    }
    while (reader != NULL)
    {
        readerNUm++;
        reader = reader->next;
    }
    printf("本图书馆共有藏书%d本,读者%d人\n", bookNUm, readerNUm);
    printf("按任意键返回\n");
    getchar();
    return;
 }
 ```
 ## C3：查找图书馆藏书信息模块
 1) 函数原形: void ShowLibBook(Book* book);
 2) 功能： 接受一个形参：图书的链表地址，遍历该链表，显示出所有图书的信息
 ```
 void ShowLibBook(Book* book1)
 {
    Book* book = book1;
    while (book != NULL)
    {                     // \t :制表符
        printf("%d\t%s\t%s\t%s\t%d\n", book->iNum, book->acName, book->acAuthor, book->acPress, book->iAmount);
        book = book->next;
    }
    printf("\n按任意键返回\n");
    getchar();
    return;
 }
 ```
 ## C4：存入新书信息模块
 1) 函数原形: Book* AddBook(Book* book);
 2) 功能： 接受一个形参：图书的链表地址，利用尾插对链表进行修改，添加图书
 ```
 Book* AddBook(Book* book1)
 {
    Book* book = book1;
    if (book == NULL)
    {
        Book* tmp = (Book*)malloc(sizeof(Book));
        tmp->next = NULL;
        assert(tmp);
        printf("输入书的编号:");
        scanf("%d", &tmp->iNum);
        getchar();
        printf("输入书的名称:");
        gets(&tmp->acName);
        printf("输入书的作者:");
        gets(tmp->acAuthor);
        printf("输入书的出版社:");
        gets(tmp->acPress);
        printf("输入书的库存量:");
        scanf("%d", &tmp->iAmount);
        book = tmp;
        printf("按任意键返回\n");
        getchar();
        return book;
        return;
    }
    while (1)
    {
        while (book->next == NULL)
        {
            int flag = 1;
            while (flag)
            {
                Book* tmp = (Book*)malloc(sizeof(Book));
                tmp->next = NULL;
                assert(tmp);
                printf("输入书的编号:");
                scanf("%d", &tmp->iNum);
                getchar();
                printf("输入书的名称:");
                gets(&tmp->acName);
                printf("输入书的作者:");
                gets(tmp->acAuthor);
                printf("输入书的出版社:");
                gets(tmp->acPress);
                printf("输入书的库存量:");
                scanf("%d", &tmp->iAmount);
                book->next = tmp;
                printf("是否继续输入:1==>继续\t0==>结束\t");
                scanf("%d", &flag);
                getchar();
                if (flag == 0)
                {
                    printf("按任意键返回\n");
                    getchar();
                    return book1;
                }
            }
        }
        book = book->next;
    }
    printf("按任意键返回\n");
    getchar();
    return;
 }
 ```
 ## C5:旧书处理信息模块
 1）函数原形: Book* DealoldBook(Book* book);
 2) 功能： 接受一个形参:图书链表的地址，遍历该链表，用书的编号进行匹配，找到该图书后删除该图书，否则返回
 ```
 Book* DealoldBook(Book* book1)
 {
    Book* book = book1;
    Book* prev = book1;
    printf("输入要处理旧书的编号:");
    int id;
    scanf("%d", &id);
    getchar();
    while (book != NULL)
    {
        if (id == book->iNum)
        {
            if (book1 == book)
            {
                book = book->next;
                free(prev);
                return book;
            }
            prev->next = book->next;
            free(book);                     // free():释放资源
            printf("已将旧书处理掉!\n");
            printf("按任意键返回\n");
            getchar();
            return book1;
        }
        prev = book;
        book = book->next;
    }
    printf("没有找到该图书\n");
    printf("按任意键返回\n");
    getchar();
    return book1;
 }
 ```
 ## C6:查找图书信息模块
 1）函数原形: void foundBook(Book* book);
 2) 功能：接受一个形参:图书链表的地址，遍历该链表，用书的编号进行匹配，找到该图书后显示该图书，否则返回
 ```
 void foundBook(Book* book1)
 {
    Book* book = book1;
    printf("输入要查找的书的id:");
    int id;
    scanf("%d", &id);
    getchar();
    while (book != NULL)
    {
        if (id == book->iNum)
        {
            printf("该书的信息如下:\n");
            printf("%d\t%s\t%s\t%s\t%d\n", book->iNum, book->acName, book->acAuthor, book->acPress, book->iAmount);
            printf("按任意键返回\n");
            getchar();
            return;
        }
        book = book->next;
    }
    printf("没有找到该书!\n");
    printf("按任意键返回\n");
    getchar();
    return;
 }
 ```
 ## C7:查询读者借阅信息模块
 1）函数原形: void foundReader_Info(Reader* reader);
 2) 功能： 接受一个形参:读者链表的地址，遍历该链表，用读者的编号进行匹配，找到该读者显示该读者的信息，否则返回
 ```
 void foundReader_Info(Reader* reader1)
 {
    Reader* reader = reader1; //备份
    printf("输入读者的id:");
    int id;
    scanf("%d", &id);
    getchar();
    while (reader)
    {
        if (id == reader->iNum)
        {
            printf("借阅的书的编号如下:\n");
            for (int i = 0; i < reader->iMax; i++)  //根据读者可以借阅的数量作为循环终止条件
            {
                if (reader->aiBookId[i] != 0)       //数组里不为0，证明有一条记录，因为：数组初始化为0，并且书的编号不可能为0
                {
                    printf("%d\n", reader->aiBookId[i]);
                }
            }
            printf("按任意键返回\n");
            getchar();
            return;
        }
        reader = reader->next;
    }
    printf("没有该读者!\n");
    printf("按任意键返回\n");
    getchar();
    return;
 }
 ```
 ## C8:查询读者借书模块
 1）函数原形: void foundReaderInfo(Reader* reader);
 2）功能: 接受一个形参:读者链表的地址，遍历该链表，用读者的编号进行匹配，找到该读者显示该读者的借阅信息，否则返回
 ```
 void foundReaderInfo(Reader* reader1)
 {
    Reader* reader = reader1;
    printf("输入读者的id:");
    int id;
    scanf("%d", &id);
    getchar();
    while (reader)
    {
        if (id == reader->iNum)
        {
            printf("读者id:%d\n", reader->iNum);
            printf("读者姓名:%s\n", reader->acName);
            printf("读者性别:%s\n", reader->acSex);
            printf("读者职位:%s\n", reader->position);
            printf("读者已借阅书的数量:%d\n", reader->iAmount);
            printf("按任意键返回\n");
            getchar();
            return;
        }
        reader = reader->next;
    }
    printf("没有找到该读者\n");
    printf("按任意键返回\n");
    getchar();
    return;
 }
 ```
 ## C9:读者借书模块
 1)函数原形: Reader* LendBook(Reader* reader, Book* book);
 2)功能:接受两个形参：读者链表地址和图书链表地址，用读者的编号进行匹配，找到该读者后，用图书的编号进行匹配，进行借书，否则返回
 ```
 Reader* LendBook(Reader* reader1, Book* book1)
 {
    Reader* reader = reader1;
    Book* book = book1;
    Reader* prev = reader1;
    Reader* tmpp = reader1;
    printf("输入读者id:");
    int id;
    scanf("%d", &id);
    getchar();
    if (reader == NULL)
    {
        Reader* tmp = (Reader*)malloc(sizeof(Reader));
        tmp->next = NULL;
        tmp->iAmount = 0;
        tmp->iNum = id;
        printf("输入读者名字:");
        scanf("%s", &tmp->acName);
        getchar();
        printf("输入读者性别:");
        scanf("%s", &tmp->acSex);
        getchar();
        printf("输入读者职位:<student\tor\tteacher>");
        scanf("%s", &tmp->position);
        getchar();
        if (strcmp(tmp->position, "student") == 0)
        {
            tmp->iMax = 20;
            tmp->day = 30;
        }
        else {
            tmp->iMax = 40;
            tmp->day = 60;
        }
        for (int i = 0; i < tmp->iMax; i++)
        {
            tmp->aiBookId[i] = 0;
        }
        printf("输入要借的书的编号:");
        int id_book;
        scanf("%d", &id_book);
        getchar();
        while (book != NULL)
        {
            if (id_book == book->iNum)
            {
                if (book->iAmount <= 1)
                {
                    printf("借阅失败，该图书库存不足.\n");
                    printf("按任意键返回\n");
                    getchar();
                    return NULL;
                }
                if ((tmp->iAmount) + 1 > tmp->iMax)
                {
                    printf("借阅失败,该读者借阅图书数量已达上线.\n");
                    printf("按任意键返回\n");
                    getchar();
                    return NULL;
                }
                book->iAmount--;
                tmp->aiBookId[tmp->iAmount] = id_book;
                tmp->iAmount;
                reader = tmp;
                printf("借阅成功!\n");
                printf("按任意键返回\n");
                getchar();
                return reader;
            }
            book = book->next;
        }
        printf("没有找到该书!\n");
        printf("按任意键返回\n");
        getchar();
        return reader1;
    }
    if (reader != NULL)
    {
        while (reader != NULL)
        {
            if (id == reader->iNum)
            {
                printf("图使馆当前的书籍册:\n");
                ShowLibBook(book);
                printf("输入要借的书的编号:");
                int id_book;
                scanf("%d", &id_book);
                getchar();
                while (book != NULL)
                {
                    if (id_book == book->iNum)
                    {
                        if (book->iAmount <= 1)
                        {
                            printf("借阅失败，该图书库存不足.\n");
                            printf("按任意键返回\n");
                            getchar();
                            return reader1;
                        }
                        if (tmpp->iAmount + 1 > tmpp->iMax)
                        {
                            printf("借阅失败,该读者借阅图书数量已达上线.\n");
                            printf("按任意键返回\n");
                            getchar();
                            return reader1;
                        }
                        reader->iAmount++;
                        reader->aiBookId[tmpp->iAmount] = id_book;
                        return reader1;
                    }
                    book = book->next;
                }
                printf("没有找到该书!\n");
                printf("按任意键返回\n");
            }
            reader = reader->next;
        }
    }
 }
 ```
 ## C10:读者还书模块
 函数原形：void returnBook(Reader* reader, Book* book);
 功能：接受两个形参：读者链表地址和图书链表地址，用读者的编号进行匹配，找到该读者后，用图书的编号进行匹配，进行还书，否则返回
 ```
 void returnBook(Reader* reader1, Book* book1)
 {
 	Reader* reader = reader1;
 	Book* book = book1;
 	printf("请输入读者的id:");
 	int id;
 	scanf("%d", &id);
 	getchar();
 	if (reader != NULL)
 	{
 		while (reader != NULL)
 		{
 			if (id == reader->iNum)
 			{
 				printf("请输入要还的书的编号:");
 				int id_book;
 				scanf("%d", &id_book);
 				getchar();
 				for (int i = 0; i < reader->iMax; i++)
 				{
 					if (reader->aiBookId[i] == id_book)
 					{
 						reader->aiBookId[i] = 0;
 						while (book)
 						{
 							if (id_book == book->iNum)
 							{
 								book->iAmount++;
 								printf("还书成功!\n");
 								printf("按任意键返回\n");
 								getchar();
 								return reader1;
 							}
 							book = book->next;
 						}
 					}
 				}
 				printf("没有找到该图书，检查图书的Id\n");
 				printf("按任意键返回\n");
 				getchar();
 				return reader1;
 			}
 			reader = reader->next;
 		}
 		printf("没有找到该读者，检查读者id是否输入有误\n");
 		printf("按任意键返回\n");
 		getchar();
 		return reader1;
 	}
 }
 ```
 ## C11:保存信息模块
 1）函数原形: void save(Book* book);
 2) 功能：接受一个形参：book的链表地址，新建一个文件，将链表中的信息保存到硬盘中
 ```
 void save(Book* book1)
 {
 	FILE* fp;
 	Book* pCur = book1;
 	int iCount = 0;
 	if (pCur == NULL)
 	{
 		printf("\n没有学生记录!\n");
 		return;
 	}
 	if ((fp = fopen("book.txt", "wb")) == NULL)
 	{
 		printf("创建文件失败!\n");
 		getchar();
 		exit(1);
 	}
 	while (pCur)
 	{
 		fwrite(pCur, sizeof(Book), 1, fp);
 		pCur = pCur->next;
 		iCount++;
 	}
 	printf("\n");
 	printf("保存文件的数据数目为:%d\n", iCount);
 	fclose(fp);
 }
 ```
 ## C12:读取信息模块
 1）函数原形: Book* read1();
 2) 功能：打开一个文件，将文件中的信息读取到内存中，并返回一个Book类型的指针
 ```
 Book* read1()
 {
 	FILE* fp;
 	Book* pHead = NULL, * pTemp = NULL, * pCur = NULL;
 	if ((fp = fopen("book.txt", "r")) == NULL)
 	{
 		printf("\n文件打开失败!请检查文件名!\n");
 		exit(0);
 	}
 	pTemp = (Book*)malloc(sizeof(Book));
 	while (fread(pTemp, sizeof(Book), 1, fp))
 	{
 		if (!pHead)
 		{
 			pHead = pCur = pTemp;
 		}
 		else
 		{
 			pCur->next = pTemp;
 			pCur = pTemp;
 		}
 		pTemp = (Book*)malloc(sizeof(Book));
 	}
 	fclose(fp);
 	return pHead;
 }
 ```
 ## 概要设计
 系统主要为开始界面和数据处理两大模块
 开始界面即显示主要功能
 数据处理包括：
 查询图书馆的总信息
 查询图书馆藏书信息
 存入新书
 旧书处理
 根据书名检索书刊信息
 查询读者的借阅信息
 查询读者信息
 读者借书
 读者还书
 文件保存
 从文件读取
 上述各模块通过主程序（main）进行调用，系统模块图如下:
 ![](images/text.drawio.svg)
 ## 详细设计
 针对概要设计
 C2:void ShowLibInfo(const Book* book, const Reader* reader);\\查询图书馆的总信息
 ![C2](images/c2.svg)
 C3:void ShowLibBook(Book* book);\\查询图书馆藏书信息
 ![c3](images/c3.svg)
 C4:Book* AddBook(Book* book);\\存入新书
 ![c4](images/c4.svg)
 C5:Book* DealoldBook(Book* book);\\旧书处理
 ![c5](images/c5.svg)
 C6:void foundBook(Book* book);\\根据书名检索书刊信息
 ![C6](images/foundbook.svg)
 C7:void foundReader_Info(Reader* reader);\\查询读者的借阅信息
 ![C7](images/foundreaderinfo.svg)
 C8:void foundReaderInfo(Reader* reader);\\查询读者信息
 ![C8](images/ReaderInfo.svg)
 C9:Reader* LendBook(Reader* reader, Book* book);\\读者借书
 ![C9](images/LendBook.svg)
 C10:void returnBook(Reader* reader, Book* book);\\读者还书
 ![C10](images/returnBook.svg)
 C11:void save(Book* book);\\文件保存
 ![C11](images/save.svg)
 C12:Book* read1();\\从文件读取
 ![C12](images/Bookread.svg)
--- a/images/Bookread.svg
+++ b/images/Bookread.svg
@ -0,0 +1,184 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <!-- Created by Flowgorithm 3.4.2 (http://flowgorithm.org) -->
 <svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" version="1.1" width="2556" height="4860">
 	<rect x="0" y="0" width="2556" height="4860" fill="#FFFFFF"/>
 	<g>
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 				<polygon fill="#404040" stroke="none" points="3216,2928 3242,2881 3189,2881"/>
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 					<text x="1872" y="2524" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="1872" dy="96" unicode-bidi="embed">reader == NULL</tspan>
 					</text>
 				</g>
 				<g>
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 						<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 2688,2928 L 1968,4368 L 3744,4368 L 4464,2928 Z"/>
 						<text x="3216" y="2956" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="3216" dy="96" unicode-bidi="embed">Output Reader* tmp =</tspan>
 							<tspan x="3216" dy="96" unicode-bidi="embed"> (Reader*)malloc(sizeof</tspan>
 							<tspan x="3216" dy="96" unicode-bidi="embed">(Reader));</tspan>
 							<tspan x="3216" dy="96" unicode-bidi="embed"></tspan>
 							<tspan x="3216" dy="96" unicode-bidi="embed"> &#13;</tspan>
 							<tspan x="3216" dy="96" unicode-bidi="embed"> tmp-&gt;next = NULL</tspan>
 							<tspan x="3216" dy="96" unicode-bidi="embed">;</tspan>
 							<tspan x="3216" dy="96" unicode-bidi="embed"></tspan>
 							<tspan x="3216" dy="96" unicode-bidi="embed"> &#13;</tspan>
 							<tspan x="3216" dy="96" unicode-bidi="embed"> tmp-&gt;iAmount =</tspan>
 							<tspan x="3216" dy="96" unicode-bidi="embed"> 0;</tspan>
 							<tspan x="3216" dy="96" unicode-bidi="embed"></tspan>
 							<tspan x="3216" dy="96" unicode-bidi="embed">&#13;</tspan>
 							<tspan x="3216" dy="96" unicode-bidi="embed">  tmp-&gt;iNum = id;</tspan>
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 						<text x="3216" y="4540" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="3216" dy="96" unicode-bidi="embed">Input &#35835;&#32773;&#21517;&#23383;</tspan>
 						</text>
 					</g>
 					<g>
 						<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 2880,4848 L 2784,5040 L 3552,5040 L 3648,4848 Z"/>
 						<text x="3216" y="4876" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="3216" dy="96" unicode-bidi="embed">Input &#35835;&#32773;&#24615;&#21035;</tspan>
 						</text>
 					</g>
 					<g>
 						<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 2880,5184 L 2784,5376 L 3552,5376 L 3648,5184 Z"/>
 						<text x="3216" y="5212" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="3216" dy="96" unicode-bidi="embed">Input &#35835;&#32773;&#32844;&#20301;</tspan>
 						</text>
 					</g>
 				</g>
 				<g>
 				</g>
 				<ellipse cx="1872" cy="5568" rx="48" ry="48" fill="#FFD0D0" stroke="#A07070" stroke-width="6"/>
 				<text x="2496" y="2428" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="2496" dy="96" unicode-bidi="embed">True</tspan>
 				</text>
 				<text x="1224" y="2428" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1224" dy="96" unicode-bidi="embed">False</tspan>
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 			<g>
 				<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="2496,6096 2832,6096 2832,6501"/>
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 				<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="2832,6912 2832,7104 1946,7104"/>
 				<polygon fill="#404040" stroke="none" points="1920,7104 1966,7130 1966,7077"/>
 				<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="1248,6096 864,6096 864,6501"/>
 				<polygon fill="#404040" stroke="none" points="864,6528 890,6481 837,6481"/>
 				<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="864,6912 864,7104 1797,7104"/>
 				<polygon fill="#404040" stroke="none" points="1824,7104 1777,7077 1777,7130"/>
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 					<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 1872,5760 L 1200,6096 L 1872,6432 L 2544,6096 Z"/>
 					<text x="1872" y="5980" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="1872" dy="96" unicode-bidi="embed">strcmp(tmp-&gt;position,</tspan>
 						<tspan x="1872" dy="96" unicode-bidi="embed"> &quot;student&quot;==0</tspan>
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 				<g>
 					<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 2496,6528 L 2304,6912 L 3168,6912 L 3360,6528 Z"/>
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 						<tspan x="2832" dy="96" unicode-bidi="embed">Output iMax =</tspan>
 						<tspan x="2832" dy="96" unicode-bidi="embed"> 20;</tspan>
 						<tspan x="2832" dy="96" unicode-bidi="embed">day = 30;</tspan>
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 				<g>
 					<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 432,6528 L 240,6912 L 1296,6912 L 1488,6528 Z"/>
 					<text x="864" y="6556" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="864" dy="96" unicode-bidi="embed">Output tmp-&gt;iMax =</tspan>
 						<tspan x="864" dy="96" unicode-bidi="embed"> 40;</tspan>
 						<tspan x="864" dy="96" unicode-bidi="embed">   tmp-&gt;day = 60;</tspan>
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 				<text x="2688" y="5932" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="2688" dy="96" unicode-bidi="embed">True</tspan>
 				</text>
 				<text x="1032" y="5932" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1032" dy="96" unicode-bidi="embed">False</tspan>
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 				<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="2880,7824 2880,7968 1968,7968 1968,7562"/>
 				<polygon fill="#404040" stroke="none" points="1968,7536 1941,7582 1994,7582"/>
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 					<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 2256,7632 L 2160,7824 L 3504,7824 L 3600,7632 Z"/>
 					<text x="2880" y="7660" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="2880" dy="96" unicode-bidi="embed">Output tmp-&gt;aiBookId[i] = 0</tspan>
 					</text>
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 				<g>
 					<path fill="#FFE0A0" stroke="#A08040" stroke-width="6" stroke-dasharray="none" d="M 1584,7344 L 1488,7440 L 1584,7536 L 2160,7536 L 2256,7440 L 2160,7344 Z"/>
 					<text x="1872" y="7372" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="1872" dy="96" unicode-bidi="embed">i = 0 to iMax</tspan>
 					</text>
 				</g>
 				<text x="2400" y="7276" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="2400" dy="96" unicode-bidi="embed">Next</tspan>
 				</text>
 				<text x="1704" y="7564" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1704" dy="96" unicode-bidi="embed">Done</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#FFFFD0" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" d="M 1488,8160 L 1488,8400 L 2256,8400 L 2256,8160 Z"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" points="1488,8208 2256,8208"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" points="1536,8160 1536,8400"/>
 				<text x="1896" y="8236" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1896" dy="96" unicode-bidi="embed">Integer idbook</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 1584,8544 L 1488,8736 L 2160,8736 L 2256,8544 Z"/>
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 					<tspan x="1872" dy="96" unicode-bidi="embed">Input idbook</tspan>
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 			<g>
 				<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 1584,8880 L 1488,9072 L 2160,9072 L 2256,8880 Z"/>
 				<text x="1872" y="8908" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1872" dy="96" unicode-bidi="embed">Input book</tspan>
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 				<polygon fill="#404040" stroke="none" points="1968,9456 1941,9502 1994,9502"/>
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 					<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="4272,9888 4992,9888 4992,10293"/>
 					<polygon fill="#404040" stroke="none" points="4992,10320 5018,10273 4965,10273"/>
 					<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="4992,13824 4992,14016 3770,14016"/>
 					<polygon fill="#404040" stroke="none" points="3744,14016 3790,14042 3790,13989"/>
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 					<polygon fill="#404040" stroke="none" points="2736,10320 2762,10273 2709,10273"/>
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 					<polygon fill="#404040" stroke="none" points="3648,14016 3601,13989 3601,14042"/>
 					<g>
 						<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 3696,9552 L 3072,9888 L 3696,10224 L 4320,9888 Z"/>
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 							<tspan x="3696" dy="96" unicode-bidi="embed">id_book == book-&gt;iNum</tspan>
 						</text>
 					</g>
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 						<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="4992,11856 4992,11973"/>
 						<polygon fill="#404040" stroke="none" points="4992,12000 5018,11953 4965,11953"/>
 						<g>
 							<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="5520,10608 5856,10608 5856,10965"/>
 							<polygon fill="#404040" stroke="none" points="5856,10992 5882,10945 5829,10945"/>
 							<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="5856,11616 5856,11808 5066,11808"/>
 							<polygon fill="#404040" stroke="none" points="5040,11808 5086,11834 5086,11781"/>
 							<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="4464,10608 4080,10608 4080,11808 4917,11808"/>
 							<polygon fill="#404040" stroke="none" points="4944,11808 4897,11781 4897,11834"/>
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 								<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 4992,10320 L 4416,10608 L 4992,10896 L 5568,10608 Z"/>
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 									<tspan x="4992" dy="96" unicode-bidi="embed">book-&gt;iAmount &lt;= 1</tspan>
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 									<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 5280,10992 L 5136,11280 L 6432,11280 L 6576,10992 Z"/>
 									<text x="5856" y="11020" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 										<tspan x="5856" dy="96" unicode-bidi="embed">Output</tspan>
 										<tspan x="5856" dy="96" unicode-bidi="embed"> &#20511;&#38405;&#22833;&#36133;&#35813;&#22270;&#20070;&#24211;&#23384;&#19981;&#36275;</tspan>
 									</text>
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 								<g>
 									<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 5424,11424 L 5328,11616 L 6288,11616 L 6384,11424 Z"/>
 									<text x="5856" y="11452" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 										<tspan x="5856" dy="96" unicode-bidi="embed">Output &#36820;&#22238;NULL</tspan>
 									</text>
 								</g>
 							</g>
 							<g>
 							</g>
 							<ellipse cx="4992" cy="11808" rx="48" ry="48" fill="#C04040" stroke="#602020" stroke-width="6"/>
 							<text x="5712" y="10444" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="5712" dy="96" unicode-bidi="embed">True</tspan>
 							</text>
 							<text x="4248" y="10444" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="4248" dy="96" unicode-bidi="embed">False</tspan>
 							</text>
 						</g>
 						<g>
 							<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="5760,12432 6096,12432 6096,12933"/>
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 							<polygon fill="#404040" stroke="none" points="5040,13776 5086,13802 5086,13749"/>
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 							<polygon fill="#404040" stroke="none" points="4944,13776 4897,13749 4897,13802"/>
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 								<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 4992,12000 L 4176,12432 L 4992,12864 L 5808,12432 Z"/>
 								<text x="4992" y="12316" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 									<tspan x="4992" dy="96" unicode-bidi="embed">(tmp-&gt;iAmount) + 1 &gt; tmp-&gt;</tspan>
 									<tspan x="4992" dy="96" unicode-bidi="embed">iMax</tspan>
 								</text>
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 								<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="6096,13248 6096,13365"/>
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 									<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 5280,12960 L 5136,13248 L 6912,13248 L 7056,12960 Z"/>
 									<text x="6096" y="12988" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 										<tspan x="6096" dy="96" unicode-bidi="embed">Output</tspan>
 										<tspan x="6096" dy="96" unicode-bidi="embed"> &#20511;&#38405;&#22833;&#36133;&#35813;&#35835;&#32773;&#20511;&#38405;&#22270;&#20070;&#25968;&#37327;&#24050;&#36798;&#19978;&#32447;</tspan>
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 								<g>
 									<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 5664,13392 L 5568,13584 L 6528,13584 L 6624,13392 Z"/>
 									<text x="6096" y="13420" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 										<tspan x="6096" dy="96" unicode-bidi="embed">Output &#36820;&#22238;NULL</tspan>
 									</text>
 								</g>
 							</g>
 							<g>
 							</g>
 							<ellipse cx="4992" cy="13776" rx="48" ry="48" fill="#C04040" stroke="#602020" stroke-width="6"/>
 							<text x="5952" y="12268" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="5952" dy="96" unicode-bidi="embed">True</tspan>
 							</text>
 							<text x="4008" y="12268" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="4008" dy="96" unicode-bidi="embed">False</tspan>
 							</text>
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 							<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 2352,10320 L 2256,10512 L 3120,10512 L 3216,10320 Z"/>
 							<text x="2736" y="10348" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="2736" dy="96" unicode-bidi="embed">Output &#20511;&#38405;&#25104;&#21151;</tspan>
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 						<g>
 							<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 2304,10656 L 2208,10848 L 3168,10848 L 3264,10656 Z"/>
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 								<tspan x="2736" dy="96" unicode-bidi="embed">Output &#36820;&#22238;reader</tspan>
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 					</g>
 					<ellipse cx="3696" cy="14016" rx="48" ry="48" fill="#C04040" stroke="#602020" stroke-width="6"/>
 					<text x="4464" y="9724" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="4464" dy="96" unicode-bidi="embed">True</tspan>
 					</text>
 					<text x="2904" y="9724" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="2904" dy="96" unicode-bidi="embed">False</tspan>
 					</text>
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 				<g>
 					<path fill="#FFE0A0" stroke="#A08040" stroke-width="6" stroke-dasharray="none" d="M 1536,9264 L 1440,9360 L 1536,9456 L 2208,9456 L 2304,9360 L 2208,9264 Z"/>
 					<text x="1872" y="9292" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="1872" dy="96" unicode-bidi="embed">book!=NULL</tspan>
 					</text>
 				</g>
 				<text x="2448" y="9196" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="2448" dy="96" unicode-bidi="embed">True</tspan>
 				</text>
 				<text x="1704" y="9484" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1704" dy="96" unicode-bidi="embed">False</tspan>
 				</text>
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 			<g>
 				<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 1296,14400 L 1200,14592 L 2448,14592 L 2544,14400 Z"/>
 				<text x="1872" y="14428" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1872" dy="96" unicode-bidi="embed">Output book = book-&gt;next</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 1392,14736 L 1296,14928 L 2352,14928 L 2448,14736 Z"/>
 				<text x="1872" y="14764" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1872" dy="96" unicode-bidi="embed">Output &#27809;&#26377;&#25214;&#21040;&#35813;&#20070;</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 1440,15072 L 1344,15264 L 2304,15264 L 2400,15072 Z"/>
 				<text x="1872" y="15100" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1872" dy="96" unicode-bidi="embed">Output &#36820;&#22238;reader1</tspan>
 				</text>
 			</g>
 			<g>
 				<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="2256,15648 2592,15648 2592,16005"/>
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 				<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="2592,24048 2592,24240 1946,24240"/>
 				<polygon fill="#404040" stroke="none" points="1920,24240 1966,24266 1966,24213"/>
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 					<path fill="#FFD0D0" stroke="#A07070" stroke-width="6" stroke-dasharray="none" d="M 1872,15408 L 1440,15648 L 1872,15888 L 2304,15648 Z"/>
 					<text x="1872" y="15580" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="1872" dy="96" unicode-bidi="embed">reader!=NULL</tspan>
 					</text>
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 						<polygon fill="#404040" stroke="none" points="2688,16224 2661,16270 2714,16270"/>
 						<g>
 							<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="4512,22848 4512,22965"/>
 							<polygon fill="#404040" stroke="none" points="4512,22992 4538,22945 4485,22945"/>
 							<g>
 								<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="4992,16608 5328,16608 5328,16965"/>
 								<polygon fill="#404040" stroke="none" points="5328,16992 5354,16945 5301,16945"/>
 								<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="5328,17904 5328,22800 4586,22800"/>
 								<polygon fill="#404040" stroke="none" points="4560,22800 4606,22826 4606,22773"/>
 								<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="4032,16608 3648,16608 3648,16965"/>
 								<polygon fill="#404040" stroke="none" points="3648,16992 3674,16945 3621,16945"/>
 								<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="3648,17952 3648,22800 4437,22800"/>
 								<polygon fill="#404040" stroke="none" points="4464,22800 4417,22773 4417,22826"/>
 								<g>
 									<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 4512,16320 L 3984,16608 L 4512,16896 L 5040,16608 Z"/>
 									<text x="4512" y="16540" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 										<tspan x="4512" dy="96" unicode-bidi="embed">id == reader-&gt;iNum</tspan>
 									</text>
 								</g>
 								<g>
 									<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="5328,17184 5328,17301"/>
 									<polygon fill="#404040" stroke="none" points="5328,17328 5354,17281 5301,17281"/>
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 									<polygon fill="#404040" stroke="none" points="5328,17712 5354,17665 5301,17665"/>
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 										<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 4704,16992 L 4608,17184 L 5952,17184 L 6048,16992 Z"/>
 										<text x="5328" y="17020" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 											<tspan x="5328" dy="96" unicode-bidi="embed">Output &#22270;&#20351;&#39302;&#24403;&#21069;&#30340;&#20070;&#20876;&#31821;</tspan>
 										</text>
 									</g>
 									<g>
 										<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 4848,17328 L 4752,17520 L 5808,17520 L 5904,17328 Z"/>
 										<text x="5328" y="17356" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 											<tspan x="5328" dy="96" unicode-bidi="embed">Input &#35201;&#20511;&#30340;&#20070;&#30340;&#32534;&#21495;</tspan>
 										</text>
 									</g>
 									<g>
 										<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="5760,17808 6624,17808 6624,17973"/>
 										<polygon fill="#404040" stroke="none" points="6624,18000 6650,17953 6597,17953"/>
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 										<polygon fill="#404040" stroke="none" points="5424,17904 5397,17950 5450,17950"/>
 										<g>
 											<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="7200,18336 7920,18336 7920,18741"/>
 											<polygon fill="#404040" stroke="none" points="7920,18768 7946,18721 7893,18721"/>
 											<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="7920,22176 7920,22368 6698,22368"/>
 											<polygon fill="#404040" stroke="none" points="6672,22368 6718,22394 6718,22341"/>
 											<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="6048,18336 5664,18336 5664,22368 6549,22368"/>
 											<polygon fill="#404040" stroke="none" points="6576,22368 6529,22341 6529,22394"/>
 											<g>
 												<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 6624,18000 L 6000,18336 L 6624,18672 L 7248,18336 Z"/>
 												<text x="6624" y="18268" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 													<tspan x="6624" dy="96" unicode-bidi="embed">id_book == book-&gt;iNum</tspan>
 												</text>
 											</g>
 											<g>
 												<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="7920,20208 7920,20325"/>
 												<polygon fill="#404040" stroke="none" points="7920,20352 7946,20305 7893,20305"/>
 												<g>
 													<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="8448,19056 8784,19056 8784,19413"/>
 													<polygon fill="#404040" stroke="none" points="8784,19440 8810,19393 8757,19393"/>
 													<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="8784,19968 8784,20160 7994,20160"/>
 													<polygon fill="#404040" stroke="none" points="7968,20160 8014,20186 8014,20133"/>
 													<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="7392,19056 7008,19056 7008,20160 7845,20160"/>
 													<polygon fill="#404040" stroke="none" points="7872,20160 7825,20133 7825,20186"/>
 													<g>
 														<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 7920,18768 L 7344,19056 L 7920,19344 L 8496,19056 Z"/>
 														<text x="7920" y="18988" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 															<tspan x="7920" dy="96" unicode-bidi="embed">book-&gt;iAmount &lt;= 1</tspan>
 														</text>
 													</g>
 													<g>
 														<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="8784,19632 8784,19749"/>
 														<polygon fill="#404040" stroke="none" points="8784,19776 8810,19729 8757,19729"/>
 														<g>
 															<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 8400,19440 L 8304,19632 L 9168,19632 L 9264,19440 Z"/>
 															<text x="8784" y="19468" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 																<tspan x="8784" dy="96" unicode-bidi="embed">Output &#20511;&#38405;&#22833;&#36133;</tspan>
 															</text>
 														</g>
 														<g>
 															<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 8304,19776 L 8208,19968 L 9264,19968 L 9360,19776 Z"/>
 															<text x="8784" y="19804" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 																<tspan x="8784" dy="96" unicode-bidi="embed">Output returnreader1</tspan>
 															</text>
 														</g>
 													</g>
 													<g>
 													</g>
 													<ellipse cx="7920" cy="20160" rx="48" ry="48" fill="#C04040" stroke="#602020" stroke-width="6"/>
 													<text x="8640" y="18892" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 														<tspan x="8640" dy="96" unicode-bidi="embed">True</tspan>
 													</text>
 													<text x="7176" y="18892" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 														<tspan x="7176" dy="96" unicode-bidi="embed">False</tspan>
 													</text>
 												</g>
 												<g>
 													<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="8688,20784 9024,20784 9024,21285"/>
 													<polygon fill="#404040" stroke="none" points="9024,21312 9050,21265 8997,21265"/>
 													<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="9024,21936 9024,22128 7994,22128"/>
 													<polygon fill="#404040" stroke="none" points="7968,22128 8014,22154 8014,22101"/>
 													<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="7152,20784 6768,20784 6768,22128 7845,22128"/>
 													<polygon fill="#404040" stroke="none" points="7872,22128 7825,22101 7825,22154"/>
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 														<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 7920,20352 L 7104,20784 L 7920,21216 L 8736,20784 Z"/>
 														<text x="7920" y="20668" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 															<tspan x="7920" dy="96" unicode-bidi="embed">(tmpp-&gt;iAmount + 1 &gt; tmpp</tspan>
 															<tspan x="7920" dy="96" unicode-bidi="embed">-&gt;iMax</tspan>
 														</text>
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 													<g>
 														<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="9024,21600 9024,21717"/>
 														<polygon fill="#404040" stroke="none" points="9024,21744 9050,21697 8997,21697"/>
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 															<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 8400,21312 L 8256,21600 L 9648,21600 L 9792,21312 Z"/>
 															<text x="9024" y="21340" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 																<tspan x="9024" dy="96" unicode-bidi="embed">Output &#20511;&#38405;&#22833;&#36133;,</tspan>
 																<tspan x="9024" dy="96" unicode-bidi="embed">&#35813;&#35835;&#32773;&#20511;&#38405;&#22270;&#20070;&#25968;&#37327;&#24050;&#36798;&#19978;&#32447;</tspan>
 															</text>
 														</g>
 														<g>
 															<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 8592,21744 L 8496,21936 L 9456,21936 L 9552,21744 Z"/>
 															<text x="9024" y="21772" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 																<tspan x="9024" dy="96" unicode-bidi="embed">Output &#36820;&#22238;reader1</tspan>
 															</text>
 														</g>
 													</g>
 													<g>
 													</g>
 													<ellipse cx="7920" cy="22128" rx="48" ry="48" fill="#C04040" stroke="#602020" stroke-width="6"/>
 													<text x="8880" y="20620" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 														<tspan x="8880" dy="96" unicode-bidi="embed">True</tspan>
 													</text>
 													<text x="6936" y="20620" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 														<tspan x="6936" dy="96" unicode-bidi="embed">False</tspan>
 													</text>
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 											</g>
 											<g>
 											</g>
 											<ellipse cx="6624" cy="22368" rx="48" ry="48" fill="#C04040" stroke="#602020" stroke-width="6"/>
 											<text x="7392" y="18172" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 												<tspan x="7392" dy="96" unicode-bidi="embed">True</tspan>
 											</text>
 											<text x="5832" y="18172" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 												<tspan x="5832" dy="96" unicode-bidi="embed">False</tspan>
 											</text>
 										</g>
 										<g>
 											<path fill="#FFE0A0" stroke="#A08040" stroke-width="6" stroke-dasharray="none" d="M 4992,17712 L 4896,17808 L 4992,17904 L 5664,17904 L 5760,17808 L 5664,17712 Z"/>
 											<text x="5328" y="17740" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 												<tspan x="5328" dy="96" unicode-bidi="embed">book!=NULL</tspan>
 											</text>
 										</g>
 										<text x="5904" y="17644" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 											<tspan x="5904" dy="96" unicode-bidi="embed">True</tspan>
 										</text>
 										<text x="5160" y="17932" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 											<tspan x="5160" dy="96" unicode-bidi="embed">False</tspan>
 										</text>
 									</g>
 								</g>
 								<g>
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 									<polygon fill="#404040" stroke="none" points="3648,17760 3674,17713 3621,17713"/>
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 										<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 3072,16992 L 2976,17184 L 4224,17184 L 4320,16992 Z"/>
 										<text x="3648" y="17020" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 											<tspan x="3648" dy="96" unicode-bidi="embed">Output reader-&gt;iAmount++</tspan>
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 									<g>
 										<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 3072,17328 L 2928,17616 L 4224,17616 L 4368,17328 Z"/>
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 											<tspan x="3648" dy="96" unicode-bidi="embed">Output reader-&gt;aiBookId</tspan>
 											<tspan x="3648" dy="96" unicode-bidi="embed">[tmpp-&gt;iAmount] = id_book</tspan>
 										</text>
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 									<g>
 										<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 3216,17760 L 3120,17952 L 4080,17952 L 4176,17760 Z"/>
 										<text x="3648" y="17788" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 											<tspan x="3648" dy="96" unicode-bidi="embed">Output &#36820;&#22238;reader1</tspan>
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 								</g>
 								<ellipse cx="4512" cy="22800" rx="48" ry="48" fill="#C04040" stroke="#602020" stroke-width="6"/>
 								<text x="5184" y="16444" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 									<tspan x="5184" dy="96" unicode-bidi="embed">True</tspan>
 								</text>
 								<text x="3816" y="16444" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 									<tspan x="3816" dy="96" unicode-bidi="embed">False</tspan>
 								</text>
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 							<g>
 								<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 3936,22992 L 3840,23184 L 5088,23184 L 5184,22992 Z"/>
 								<text x="4512" y="23020" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 									<tspan x="4512" dy="96" unicode-bidi="embed">Output book = book-&gt;next</tspan>
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 						</g>
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 							<path fill="#FFE0A0" stroke="#A08040" stroke-width="6" stroke-dasharray="none" d="M 2208,16032 L 2112,16128 L 2208,16224 L 2976,16224 L 3072,16128 L 2976,16032 Z"/>
 							<text x="2592" y="16060" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="2592" dy="96" unicode-bidi="embed">reader != NULL</tspan>
 							</text>
 						</g>
 						<text x="3216" y="15964" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="3216" dy="96" unicode-bidi="embed">True</tspan>
 						</text>
 						<text x="2424" y="16252" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="2424" dy="96" unicode-bidi="embed">False</tspan>
 						</text>
 					</g>
 					<g>
 						<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 2112,23520 L 2016,23712 L 3072,23712 L 3168,23520 Z"/>
 						<text x="2592" y="23548" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="2592" dy="96" unicode-bidi="embed">Output &#27809;&#26377;&#25214;&#21040;&#35813;&#20070;</tspan>
 						</text>
 					</g>
 					<g>
 						<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 2112,23856 L 2016,24048 L 3072,24048 L 3168,23856 Z"/>
 						<text x="2592" y="23884" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="2592" dy="96" unicode-bidi="embed">Output &#25353;&#20219;&#24847;&#38190;&#36820;&#22238;</tspan>
 						</text>
 					</g>
 				</g>
 				<g>
 					<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 576,15984 L 432,16272 L 1632,16272 L 1776,15984 Z"/>
 					<text x="1104" y="16012" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="1104" dy="96" unicode-bidi="embed">Output reader = reader-&gt;</tspan>
 						<tspan x="1104" dy="96" unicode-bidi="embed">next</tspan>
 					</text>
 				</g>
 				<ellipse cx="1872" cy="24240" rx="48" ry="48" fill="#FFD0D0" stroke="#A07070" stroke-width="6"/>
 				<text x="2448" y="15484" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="2448" dy="96" unicode-bidi="embed">True</tspan>
 				</text>
 				<text x="1272" y="15484" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1272" dy="96" unicode-bidi="embed">False</tspan>
 				</text>
 			</g>
 		</g>
 	</g>
 </svg>
--- a/images/ReaderInfo.svg
+++ b/images/ReaderInfo.svg
@ -0,0 +1,166 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <!-- Created by Flowgorithm 3.4.2 (http://flowgorithm.org) -->
 <svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" version="1.1" width="4416" height="6144">
 	<rect x="0" y="0" width="4416" height="6144" fill="#FFFFFF"/>
 	<g>
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 			<text x="816" y="220" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 				<tspan x="816" dy="96" unicode-bidi="embed">ReaderInfo</tspan>
 			</text>
 		</g>
 		<g>
 			<path fill="#F0E0FF" stroke="#9070A0" stroke-width="6" stroke-dasharray="none" d="M 624,5760 A 96 96, 0, 0 0, 624 5952 L 1008,5952 A 96 96, 0, 0 0, 1008 5760 Z"/>
 			<text x="816" y="5788" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 				<tspan x="816" dy="96" unicode-bidi="embed">End</tspan>
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 			<polygon fill="#404040" stroke="none" points="816,5424 842,5377 789,5377"/>
 			<g>
 				<path fill="#FFFFD0" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" d="M 432,528 L 432,768 L 1200,768 L 1200,528 Z"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" points="432,576 1200,576"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" points="480,528 480,768"/>
 				<text x="840" y="604" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="840" dy="96" unicode-bidi="embed">String reader1</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#FFFFD0" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" d="M 528,912 L 528,1152 L 1104,1152 L 1104,912 Z"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" points="528,960 1104,960"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" points="576,912 576,1152"/>
 				<text x="840" y="988" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="840" dy="96" unicode-bidi="embed">Integer id</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 624,1296 L 528,1488 L 1008,1488 L 1104,1296 Z"/>
 				<text x="816" y="1324" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="816" dy="96" unicode-bidi="embed">Input id</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 480,1632 L 384,1824 L 1152,1824 L 1248,1632 Z"/>
 				<text x="816" y="1660" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="816" dy="96" unicode-bidi="embed">Input reader1</tspan>
 				</text>
 			</g>
 			<g>
 				<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="1104,2112 2688,2112 2688,2277"/>
 				<polygon fill="#404040" stroke="none" points="2688,2304 2714,2257 2661,2257"/>
 				<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="2688,4752 2688,4896 912,4896 912,2234"/>
 				<polygon fill="#404040" stroke="none" points="912,2208 885,2254 938,2254"/>
 				<g>
 					<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="3168,2592 3504,2592 3504,2949"/>
 					<polygon fill="#404040" stroke="none" points="3504,2976 3530,2929 3477,2929"/>
 					<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="3504,4512 3504,4704 2762,4704"/>
 					<polygon fill="#404040" stroke="none" points="2736,4704 2782,4730 2782,4677"/>
 					<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="2208,2592 1824,2592 1824,2949"/>
 					<polygon fill="#404040" stroke="none" points="1824,2976 1850,2929 1797,2929"/>
 					<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="1824,3264 1824,4704 2613,4704"/>
 					<polygon fill="#404040" stroke="none" points="2640,4704 2593,4677 2593,4730"/>
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 						<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 2688,2304 L 2160,2592 L 2688,2880 L 3216,2592 Z"/>
 						<text x="2688" y="2524" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="2688" dy="96" unicode-bidi="embed">id == reader-&gt;iNum</tspan>
 						</text>
 					</g>
 					<g>
 						<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="3504,3168 3504,3285"/>
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 						<polygon fill="#404040" stroke="none" points="3504,3984 3530,3937 3477,3937"/>
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 						<polygon fill="#404040" stroke="none" points="3504,4320 3530,4273 3477,4273"/>
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 							<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 3168,2976 L 3072,3168 L 3840,3168 L 3936,2976 Z"/>
 							<text x="3504" y="3004" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="3504" dy="96" unicode-bidi="embed">Output &#35835;&#32773;id</tspan>
 							</text>
 						</g>
 						<g>
 							<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 3120,3312 L 3024,3504 L 3888,3504 L 3984,3312 Z"/>
 							<text x="3504" y="3340" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="3504" dy="96" unicode-bidi="embed">Output &#35835;&#32773;&#22995;&#21517;</tspan>
 							</text>
 						</g>
 						<g>
 							<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 3120,3648 L 3024,3840 L 3888,3840 L 3984,3648 Z"/>
 							<text x="3504" y="3676" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="3504" dy="96" unicode-bidi="embed">Output &#35835;&#32773;&#24615;&#21035;</tspan>
 							</text>
 						</g>
 						<g>
 							<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 2880,3984 L 2784,4176 L 4128,4176 L 4224,3984 Z"/>
 							<text x="3504" y="4012" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="3504" dy="96" unicode-bidi="embed">Output &#35835;&#32773;&#24050;&#20511;&#38405;&#20070;&#30340;&#25968;&#37327;</tspan>
 							</text>
 						</g>
 						<g>
 							<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 3216,4320 L 3120,4512 L 3792,4512 L 3888,4320 Z"/>
 							<text x="3504" y="4348" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="3504" dy="96" unicode-bidi="embed">Input reader</tspan>
 							</text>
 						</g>
 					</g>
 					<g>
 						<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 1296,2976 L 1152,3264 L 2352,3264 L 2496,2976 Z"/>
 						<text x="1824" y="3004" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="1824" dy="96" unicode-bidi="embed">Output reader = reader-&gt;</tspan>
 							<tspan x="1824" dy="96" unicode-bidi="embed">next</tspan>
 						</text>
 					</g>
 					<ellipse cx="2688" cy="4704" rx="48" ry="48" fill="#C04040" stroke="#602020" stroke-width="6"/>
 					<text x="3360" y="2428" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="3360" dy="96" unicode-bidi="embed">True</tspan>
 					</text>
 					<text x="1992" y="2428" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="1992" dy="96" unicode-bidi="embed">False</tspan>
 					</text>
 				</g>
 				<g>
 					<path fill="#FFE0A0" stroke="#A08040" stroke-width="6" stroke-dasharray="none" d="M 624,2016 L 528,2112 L 624,2208 L 1008,2208 L 1104,2112 L 1008,2016 Z"/>
 					<text x="816" y="2044" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="816" dy="96" unicode-bidi="embed">reader</tspan>
 					</text>
 				</g>
 				<text x="1248" y="1948" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1248" dy="96" unicode-bidi="embed">True</tspan>
 				</text>
 				<text x="648" y="2236" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="648" dy="96" unicode-bidi="embed">False</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 288,5088 L 192,5280 L 1344,5280 L 1440,5088 Z"/>
 				<text x="816" y="5116" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="816" dy="96" unicode-bidi="embed">Output &#27809;&#26377;&#25214;&#21040;&#35813;&#35835;&#32773;</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 528,5424 L 432,5616 L 1104,5616 L 1200,5424 Z"/>
 				<text x="816" y="5452" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="816" dy="96" unicode-bidi="embed">Input reader</tspan>
 				</text>
 			</g>
 		</g>
 	</g>
 </svg>
--- a/images/c2.svg
+++ b/images/c2.svg
@ -0,0 +1,128 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <!-- Created by Flowgorithm 3.4.2 (http://flowgorithm.org) -->
 <svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" version="1.1" width="2196" height="3996">
 	<rect x="0" y="0" width="2196" height="3996" fill="#FFFFFF"/>
 	<g>
 		<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="828,288 828,375"/>
 		<polygon fill="#404040" stroke="none" points="828,396 848,361 807,361"/>
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 		<polygon fill="#404040" stroke="none" points="828,3708 848,3673 807,3673"/>
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 			<path fill="#F0E0FF" stroke="#9070A0" stroke-width="5" stroke-dasharray="none" d="M 684,144 A 72 72, 0, 0 0, 684 288 L 972,288 A 72 72, 0, 0 0, 972 144 Z"/>
 			<text x="828" y="165" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 				<tspan x="828" dy="72" unicode-bidi="embed">&#24320;&#22987;</tspan>
 			</text>
 		</g>
 		<g>
 			<path fill="#F0E0FF" stroke="#9070A0" stroke-width="5" stroke-dasharray="none" d="M 684,3708 A 72 72, 0, 0 0, 684 3852 L 972,3852 A 72 72, 0, 0 0, 972 3708 Z"/>
 			<text x="828" y="3729" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 				<tspan x="828" dy="72" unicode-bidi="embed">End</tspan>
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 				<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 396,396 L 396,648 L 1260,648 L 1260,396 Z"/>
 				<polyline fill="none" stroke="#602020" stroke-width="5" stroke-dasharray="none" points="396,432 1260,432"/>
 				<polyline fill="none" stroke="#602020" stroke-width="5" stroke-dasharray="none" points="432,396 432,648"/>
 				<text x="846" y="453" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="846" dy="72" unicode-bidi="embed">Integer Book*book=book1</tspan>
 					<tspan x="846" dy="72" unicode-bidi="embed"> Reader*reader=reader1</tspan>
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 			</g>
 			<g>
 				<path fill="#FFFFD0" stroke="#A0A070" stroke-width="5" stroke-dasharray="none" d="M 576,756 L 576,900 L 1080,900 L 1080,756 Z"/>
 				<text x="828" y="777" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="828" dy="72" unicode-bidi="embed">bookNUm = 0</tspan>
 				</text>
 			</g>
 			<g>
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 					<tspan x="828" dy="72" unicode-bidi="embed">readerNUm = 0</tspan>
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 			<g>
 				<path fill="#FFFFD0" stroke="#A0A070" stroke-width="5" stroke-dasharray="none" d="M 540,1260 L 540,1404 L 1116,1404 L 1116,1260 Z"/>
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 					<tspan x="828" dy="72" unicode-bidi="embed">mangerNUm = 0</tspan>
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 					<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 1188,1764 L 1044,2052 L 1908,2052 L 2052,1764 Z"/>
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 						<tspan x="1548" dy="72" unicode-bidi="embed">Output readerNUm</tspan>
 						<tspan x="1548" dy="72" unicode-bidi="embed">++;&#13;</tspan>
 						<tspan x="1548" dy="72" unicode-bidi="embed">reader=reader-&gt;next;</tspan>
 					</text>
 				</g>
 				<g>
 					<path fill="#FFE0A0" stroke="#A08040" stroke-width="5" stroke-dasharray="none" d="M 576,1548 L 504,1620 L 576,1692 L 1080,1692 L 1152,1620 L 1080,1548 Z"/>
 					<text x="828" y="1569" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="828" dy="72" unicode-bidi="embed">reader!=NULL</tspan>
 					</text>
 				</g>
 				<text x="1260" y="1497" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1260" dy="72" unicode-bidi="embed">True</tspan>
 				</text>
 				<text x="702" y="1713" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="702" dy="72" unicode-bidi="embed">False</tspan>
 				</text>
 			</g>
 			<g>
 				<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="1152,2412 1548,2412 1548,2535"/>
 				<polygon fill="#404040" stroke="none" points="1548,2556 1568,2521 1527,2521"/>
 				<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="1548,2844 1548,2952 900,2952 900,2504"/>
 				<polygon fill="#404040" stroke="none" points="900,2484 879,2518 920,2518"/>
 				<g>
 					<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 1188,2556 L 1044,2844 L 1908,2844 L 2052,2556 Z"/>
 					<text x="1548" y="2577" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="1548" dy="72" unicode-bidi="embed">Output readerNUm</tspan>
 						<tspan x="1548" dy="72" unicode-bidi="embed">++;&#13;</tspan>
 						<tspan x="1548" dy="72" unicode-bidi="embed">reader=reader-&gt;next;</tspan>
 					</text>
 				</g>
 				<g>
 					<path fill="#FFE0A0" stroke="#A08040" stroke-width="5" stroke-dasharray="none" d="M 576,2340 L 504,2412 L 576,2484 L 1080,2484 L 1152,2412 L 1080,2340 Z"/>
 					<text x="828" y="2361" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="828" dy="72" unicode-bidi="embed">reader!=NULL</tspan>
 					</text>
 				</g>
 				<text x="1260" y="2289" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1260" dy="72" unicode-bidi="embed">True</tspan>
 				</text>
 				<text x="702" y="2505" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="702" dy="72" unicode-bidi="embed">False</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 396,3096 L 144,3600 L 1260,3600 L 1512,3096 Z"/>
 				<text x="828" y="3117" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="828" dy="72" unicode-bidi="embed">Output printf</tspan>
 					<tspan x="828" dy="72" unicode-bidi="embed">(&quot;&#26412;&#22270;&#20070;&#39302;&#20849;&#26377;&#34255;&#20070;%d&#26412;,</tspan>
 					<tspan x="828" dy="72" unicode-bidi="embed">&#35835;&#32773;%d&#20154;\n&quot;, bookNUm,</tspan>
 					<tspan x="828" dy="72" unicode-bidi="embed"> readerNUm);&#13;</tspan>
 					<tspan x="828" dy="72" unicode-bidi="embed">printf</tspan>
 					<tspan x="828" dy="72" unicode-bidi="embed">(&quot;&#25353;&#20219;&#24847;&#38190;&#36820;&#22238;\n&quot;);</tspan>
 				</text>
 			</g>
 		</g>
 	</g>
 </svg>
--- a/images/c3.svg
+++ b/images/c3.svg
@ -0,0 +1,75 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <!-- Created by Flowgorithm 3.4.2 (http://flowgorithm.org) -->
 <svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" version="1.1" width="2412" height="2484">
 	<rect x="0" y="0" width="2412" height="2484" fill="#FFFFFF"/>
 	<g>
 		<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="612,288 612,375"/>
 		<polygon fill="#404040" stroke="none" points="612,396 632,361 591,361"/>
 		<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="612,2088 612,2175"/>
 		<polygon fill="#404040" stroke="none" points="612,2196 632,2161 591,2161"/>
 		<g>
 			<path fill="#F0E0FF" stroke="#9070A0" stroke-width="5" stroke-dasharray="none" d="M 468,144 A 72 72, 0, 0 0, 468 288 L 756,288 A 72 72, 0, 0 0, 756 144 Z"/>
 			<text x="612" y="165" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 				<tspan x="612" dy="72" unicode-bidi="embed">Main</tspan>
 			</text>
 		</g>
 		<g>
 			<path fill="#F0E0FF" stroke="#9070A0" stroke-width="5" stroke-dasharray="none" d="M 468,2196 A 72 72, 0, 0 0, 468 2340 L 756,2340 A 72 72, 0, 0 0, 756 2196 Z"/>
 			<text x="612" y="2217" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 				<tspan x="612" dy="72" unicode-bidi="embed">End</tspan>
 			</text>
 		</g>
 		<g>
 			<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="612,540 612,663"/>
 			<polygon fill="#404040" stroke="none" points="612,684 632,649 591,649"/>
 			<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="612,828 612,1707"/>
 			<polygon fill="#404040" stroke="none" points="612,1728 632,1693 591,1693"/>
 			<g>
 				<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 288,396 L 288,540 L 936,540 L 936,396 Z"/>
 				<text x="612" y="417" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="612" dy="72" unicode-bidi="embed">Book*book = book1</tspan>
 				</text>
 			</g>
 			<g>
 				<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="936,756 1548,756 1548,879"/>
 				<polygon fill="#404040" stroke="none" points="1548,900 1568,865 1527,865"/>
 				<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="1548,1476 1548,1584 684,1584 684,848"/>
 				<polygon fill="#404040" stroke="none" points="684,828 663,862 704,862"/>
 				<g>
 					<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 1116,900 L 828,1476 L 1980,1476 L 2268,900 Z"/>
 					<text x="1548" y="921" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="1548" dy="72" unicode-bidi="embed">Output printf(&quot;%d\t%s\t%s\t</tspan>
 						<tspan x="1548" dy="72" unicode-bidi="embed">%s\t%d\n&quot;, book-&gt;iNum,</tspan>
 						<tspan x="1548" dy="72" unicode-bidi="embed"> book-&gt;acName, book-&gt;</tspan>
 						<tspan x="1548" dy="72" unicode-bidi="embed">acAuthor, book-&gt;acPress,</tspan>
 						<tspan x="1548" dy="72" unicode-bidi="embed"> book-&gt;</tspan>
 						<tspan x="1548" dy="72" unicode-bidi="embed">iAmount);&#13;</tspan>
 						<tspan x="1548" dy="72" unicode-bidi="embed">book = book-&gt;next;</tspan>
 					</text>
 				</g>
 				<g>
 					<path fill="#FFE0A0" stroke="#A08040" stroke-width="5" stroke-dasharray="none" d="M 360,684 L 288,756 L 360,828 L 864,828 L 936,756 L 864,684 Z"/>
 					<text x="612" y="705" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="612" dy="72" unicode-bidi="embed">book!=NULL</tspan>
 					</text>
 				</g>
 				<text x="1044" y="633" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1044" dy="72" unicode-bidi="embed">True</tspan>
 				</text>
 				<text x="486" y="849" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="486" dy="72" unicode-bidi="embed">False</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 324,1728 L 144,2088 L 900,2088 L 1080,1728 Z"/>
 				<text x="612" y="1749" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="612" dy="72" unicode-bidi="embed">Output printf(&quot;\</tspan>
 					<tspan x="612" dy="72" unicode-bidi="embed">n&#25353;&#20219;&#24847;&#38190;&#36820;&#22238;\</tspan>
 					<tspan x="612" dy="72" unicode-bidi="embed">n&quot;);&#13;</tspan>
 					<tspan x="612" dy="72" unicode-bidi="embed">getchar();</tspan>
 				</text>
 			</g>
 		</g>
 	</g>
 </svg>
--- a/images/c4.svg
+++ b/images/c4.svg
@ -0,0 +1,281 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <!-- Created by Flowgorithm 3.4.2 (http://flowgorithm.org) -->
 <svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" version="1.1" width="6480" height="11124">
 	<rect x="0" y="0" width="6480" height="11124" fill="#FFFFFF"/>
 	<g>
 		<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="756,288 756,375"/>
 		<polygon fill="#404040" stroke="none" points="756,396 776,361 735,361"/>
 		<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="756,10728 756,10815"/>
 		<polygon fill="#404040" stroke="none" points="756,10836 776,10801 735,10801"/>
 		<g>
 			<path fill="#F0E0FF" stroke="#9070A0" stroke-width="5" stroke-dasharray="none" d="M 612,144 A 72 72, 0, 0 0, 612 288 L 900,288 A 72 72, 0, 0 0, 900 144 Z"/>
 			<text x="756" y="165" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 				<tspan x="756" dy="72" unicode-bidi="embed">kaishi</tspan>
 			</text>
 		</g>
 		<g>
 			<path fill="#F0E0FF" stroke="#9070A0" stroke-width="5" stroke-dasharray="none" d="M 612,10836 A 72 72, 0, 0 0, 612 10980 L 900,10980 A 72 72, 0, 0 0, 900 10836 Z"/>
 			<text x="756" y="10857" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 				<tspan x="756" dy="72" unicode-bidi="embed">End</tspan>
 			</text>
 		</g>
 		<g>
 			<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="756,540 756,627"/>
 			<polygon fill="#404040" stroke="none" points="756,648 776,613 735,613"/>
 			<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="756,4068 756,4191"/>
 			<polygon fill="#404040" stroke="none" points="756,4212 776,4177 735,4177"/>
 			<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="756,4356 756,10419"/>
 			<polygon fill="#404040" stroke="none" points="756,10440 776,10405 735,10405"/>
 			<g>
 				<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 432,396 L 432,540 L 1080,540 L 1080,396 Z"/>
 				<text x="756" y="417" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="756" dy="72" unicode-bidi="embed">Book*book = book1</tspan>
 				</text>
 			</g>
 			<g>
 				<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="1044,828 2700,828 2700,1059"/>
 				<polygon fill="#404040" stroke="none" points="2700,1080 2720,1045 2679,1045"/>
 				<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="2700,3888 2700,4032 812,4032"/>
 				<polygon fill="#404040" stroke="none" points="792,4032 826,4052 826,4011"/>
 				<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="468,828 180,828 180,4032 699,4032"/>
 				<polygon fill="#404040" stroke="none" points="720,4032 685,4011 685,4052"/>
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 					<path fill="#FFD0D0" stroke="#A07070" stroke-width="5" stroke-dasharray="none" d="M 756,648 L 432,828 L 756,1008 L 1080,828 Z"/>
 					<text x="756" y="777" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="756" dy="72" unicode-bidi="embed">book==NULL</tspan>
 					</text>
 				</g>
 				<g>
 					<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 2232,1080 L 828,3888 L 3168,3888 L 4572,1080 Z"/>
 					<text x="2700" y="1101" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="2700" dy="72" unicode-bidi="embed">Output Book* tmp = (Book*)</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">malloc(sizeof</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">(Book));&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;tmp-&gt;next = NULL</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">;&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;assert</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">(tmp);&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;printf</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">(&quot;&#36755;&#20837;&#20070;&#30340;&#32534;&#21495;:&quot;);&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;scanf(&quot;%d&quot;, &amp;tmp-&gt;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">iNum);&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;getchar</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">();&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;printf</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">(&quot;&#36755;&#20837;&#20070;&#30340;&#21517;&#31216;:&quot;);&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;gets(&amp;tmp-&gt;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">acName);&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;printf</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">(&quot;&#36755;&#20837;&#20070;&#30340;&#20316;&#32773;:&quot;);&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;gets(tmp-&gt;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">acAuthor);&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;printf</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">(&quot;&#36755;&#20837;&#20070;&#30340;&#20986;&#29256;&#31038;:&quot;);&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;gets(tmp-&gt;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">acPress);&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;printf</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">(&quot;&#36755;&#20837;&#20070;&#30340;&#24211;&#23384;&#37327;:&quot;);&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;scanf(&quot;%d&quot;, &amp;tmp-&gt;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">iAmount);&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;book = tmp</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">;&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed"></tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed"> &#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;printf(&quot;&#25353;&#20219;&#24847;&#38190;&#36820;&#22238;\</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">n&quot;);&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;getchar</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">();&#13;</tspan>
 						<tspan x="2700" dy="72" unicode-bidi="embed">&#9;&#9;return book;</tspan>
 					</text>
 				</g>
 				<g>
 				</g>
 				<ellipse cx="756" cy="4032" rx="36" ry="36" fill="#FFD0D0" stroke="#A07070" stroke-width="5"/>
 				<text x="1188" y="705" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1188" dy="72" unicode-bidi="embed">True</tspan>
 				</text>
 				<text x="306" y="705" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="306" dy="72" unicode-bidi="embed">False</tspan>
 				</text>
 			</g>
 			<g>
 				<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="972,4284 1440,4284 1440,4443"/>
 				<polygon fill="#404040" stroke="none" points="1440,4464 1460,4429 1419,4429"/>
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 				<polygon fill="#404040" stroke="none" points="828,4356 807,4390 848,4390"/>
 				<g>
 					<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="1440,4608 1440,10023"/>
 					<polygon fill="#404040" stroke="none" points="1440,10044 1460,10009 1419,10009"/>
 					<g>
 						<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="1836,4536 2016,4536 2016,4659"/>
 						<polygon fill="#404040" stroke="none" points="2016,4680 2036,4645 1995,4645"/>
 						<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="2016,5400 2016,9900 1512,9900 1512,4628"/>
 						<polygon fill="#404040" stroke="none" points="1512,4608 1491,4642 1532,4642"/>
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 							<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="2016,4860 2016,4947"/>
 							<polygon fill="#404040" stroke="none" points="2016,4968 2036,4933 1995,4933"/>
 							<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="2016,5112 2016,5235"/>
 							<polygon fill="#404040" stroke="none" points="2016,5256 2036,5221 1995,5221"/>
 							<g>
 								<path fill="#FFFFD0" stroke="#A0A070" stroke-width="5" stroke-dasharray="none" d="M 1800,4680 L 1800,4860 L 2232,4860 L 2232,4680 Z"/>
 								<polyline fill="none" stroke="#A0A070" stroke-width="5" stroke-dasharray="none" points="1800,4716 2232,4716"/>
 								<polyline fill="none" stroke="#A0A070" stroke-width="5" stroke-dasharray="none" points="1836,4680 1836,4860"/>
 								<text x="2034" y="4737" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 									<tspan x="2034" dy="72" unicode-bidi="embed">Integer flag</tspan>
 								</text>
 							</g>
 							<g>
 								<path fill="#FFFFD0" stroke="#A0A070" stroke-width="5" stroke-dasharray="none" d="M 1800,4968 L 1800,5112 L 2232,5112 L 2232,4968 Z"/>
 								<text x="2016" y="4989" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 									<tspan x="2016" dy="72" unicode-bidi="embed">flag = 1</tspan>
 								</text>
 							</g>
 							<g>
 								<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="2232,5328 4284,5328 4284,5451"/>
 								<polygon fill="#404040" stroke="none" points="4284,5472 4304,5437 4263,5437"/>
 								<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="4284,9648 4284,9756 2088,9756 2088,5420"/>
 								<polygon fill="#404040" stroke="none" points="2088,5400 2067,5434 2108,5434"/>
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 									<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="4284,8640 4284,8727"/>
 									<polygon fill="#404040" stroke="none" points="4284,8748 4304,8713 4263,8713"/>
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 										<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 3816,5472 L 2232,8640 L 4752,8640 L 6336,5472 Z"/>
 										<text x="4284" y="5493" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 											<tspan x="4284" dy="72" unicode-bidi="embed">Output Book* tmp = (Book*)</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">malloc(sizeof</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">(Book));&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed"></tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed"> &#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;tmp-&gt;next = NULL</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">;&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;assert</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">(tmp);&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;printf</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">(&quot;&#36755;&#20837;&#20070;&#30340;&#32534;&#21495;:&quot;);&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;scanf(&quot;%d&quot;, &amp;tmp-&gt;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">iNum);&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;getchar</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">();&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;printf</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">(&quot;&#36755;&#20837;&#20070;&#30340;&#21517;&#31216;:&quot;);&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;gets(&amp;tmp-&gt;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">acName);&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;printf</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">(&quot;&#36755;&#20837;&#20070;&#30340;&#20316;&#32773;:&quot;);&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;gets(tmp-&gt;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">acAuthor);&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;printf</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">(&quot;&#36755;&#20837;&#20070;&#30340;&#20986;&#29256;&#31038;:&quot;);&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;gets(tmp-&gt;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">acPress);&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;printf</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">(&quot;&#36755;&#20837;&#20070;&#30340;&#24211;&#23384;&#37327;:&quot;);&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;scanf(&quot;%d&quot;, &amp;tmp-&gt;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">iAmount);&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed"></tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed"> &#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;book-&gt;next = tmp</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">;&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed"></tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed"> &#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;printf(&quot;&#26159;&#21542;&#32487;&#32493;&#36755;&#20837;:1==&gt;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#32487;&#32493;\t0==&gt;&#32467;&#26463;\</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">t&quot;);&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;scanf(&quot;%d&quot;, &amp;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">flag);&#13;</tspan>
 											<tspan x="4284" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;getchar();</tspan>
 										</text>
 									</g>
 									<g>
 										<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="4464,8856 5040,8856 5040,9015"/>
 										<polygon fill="#404040" stroke="none" points="5040,9036 5060,9001 5019,9001"/>
 										<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="5040,9468 5040,9612 4340,9612"/>
 										<polygon fill="#404040" stroke="none" points="4320,9612 4354,9632 4354,9591"/>
 										<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="4104,8856 3816,8856 3816,9612 4227,9612"/>
 										<polygon fill="#404040" stroke="none" points="4248,9612 4213,9591 4213,9632"/>
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 											<path fill="#FFD0D0" stroke="#A07070" stroke-width="5" stroke-dasharray="none" d="M 4284,8748 L 4068,8856 L 4284,8964 L 4500,8856 Z"/>
 											<text x="4284" y="8805" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 												<tspan x="4284" dy="72" unicode-bidi="embed">flag==0</tspan>
 											</text>
 										</g>
 										<g>
 											<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 4572,9036 L 4356,9468 L 5508,9468 L 5724,9036 Z"/>
 											<text x="5040" y="9057" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 												<tspan x="5040" dy="72" unicode-bidi="embed">Output printf(&quot;&#25353;&#20219;&#24847;&#38190;&#36820;&#22238;\</tspan>
 												<tspan x="5040" dy="72" unicode-bidi="embed">n&quot;);&#13;</tspan>
 												<tspan x="5040" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;&#9;getchar</tspan>
 												<tspan x="5040" dy="72" unicode-bidi="embed">();&#13;</tspan>
 												<tspan x="5040" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;&#9;return book1;</tspan>
 											</text>
 										</g>
 										<g>
 										</g>
 										<ellipse cx="4284" cy="9612" rx="36" ry="36" fill="#FFD0D0" stroke="#A07070" stroke-width="5"/>
 										<text x="4608" y="8733" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 											<tspan x="4608" dy="72" unicode-bidi="embed">True</tspan>
 										</text>
 										<text x="3942" y="8733" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 											<tspan x="3942" dy="72" unicode-bidi="embed">False</tspan>
 										</text>
 									</g>
 								</g>
 								<g>
 									<path fill="#FFE0A0" stroke="#A08040" stroke-width="5" stroke-dasharray="none" d="M 1872,5256 L 1800,5328 L 1872,5400 L 2160,5400 L 2232,5328 L 2160,5256 Z"/>
 									<text x="2016" y="5277" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 										<tspan x="2016" dy="72" unicode-bidi="embed">flag</tspan>
 									</text>
 								</g>
 								<text x="2340" y="5205" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 									<tspan x="2340" dy="72" unicode-bidi="embed">True</tspan>
 								</text>
 								<text x="1890" y="5421" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 									<tspan x="1890" dy="72" unicode-bidi="embed">False</tspan>
 								</text>
 							</g>
 						</g>
 						<g>
 							<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 1116,4464 L 1044,4536 L 1116,4608 L 1764,4608 L 1836,4536 L 1764,4464 Z"/>
 							<text x="1440" y="4485" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="1440" dy="72" unicode-bidi="embed">book-&gt;next==NULL</tspan>
 							</text>
 						</g>
 						<text x="1944" y="4413" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="1944" dy="72" unicode-bidi="embed">True</tspan>
 						</text>
 						<text x="1314" y="4629" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="1314" dy="72" unicode-bidi="embed">False</tspan>
 						</text>
 					</g>
 					<g>
 						<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 1044,10044 L 972,10188 L 1836,10188 L 1908,10044 Z"/>
 						<text x="1440" y="10065" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="1440" dy="72" unicode-bidi="embed">Output book=book-&gt;next</tspan>
 						</text>
 					</g>
 				</g>
 				<g>
 					<path fill="#FFE0A0" stroke="#A08040" stroke-width="5" stroke-dasharray="none" d="M 612,4212 L 540,4284 L 612,4356 L 900,4356 L 972,4284 L 900,4212 Z"/>
 					<text x="756" y="4233" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="756" dy="72" unicode-bidi="embed">1</tspan>
 					</text>
 				</g>
 				<text x="1080" y="4161" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1080" dy="72" unicode-bidi="embed">True</tspan>
 				</text>
 				<text x="630" y="4377" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="630" dy="72" unicode-bidi="embed">False</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 288,10440 L 144,10728 L 1224,10728 L 1368,10440 Z"/>
 				<text x="756" y="10461" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="756" dy="72" unicode-bidi="embed">Output printf(&quot;&#25353;&#20219;&#24847;&#38190;&#36820;&#22238;\</tspan>
 					<tspan x="756" dy="72" unicode-bidi="embed">n&quot;);&#13;</tspan>
 					<tspan x="756" dy="72" unicode-bidi="embed">&#9;getchar();</tspan>
 				</text>
 			</g>
 		</g>
 	</g>
 </svg>
--- a/images/c5.svg
+++ b/images/c5.svg
@ -0,0 +1,183 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <!-- Created by Flowgorithm 3.4.2 (http://flowgorithm.org) -->
 <svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" version="1.1" width="5724" height="5472">
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 		<polygon fill="#404040" stroke="none" points="756,5184 776,5149 735,5149"/>
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 			<path fill="#F0E0FF" stroke="#9070A0" stroke-width="5" stroke-dasharray="none" d="M 612,144 A 72 72, 0, 0 0, 612 288 L 900,288 A 72 72, 0, 0 0, 900 144 Z"/>
 			<text x="756" y="165" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 				<tspan x="756" dy="72" unicode-bidi="embed">begin</tspan>
 			</text>
 		</g>
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 			<path fill="#F0E0FF" stroke="#9070A0" stroke-width="5" stroke-dasharray="none" d="M 432,5184 A 72 72, 0, 0 0, 432 5328 L 1080,5328 A 72 72, 0, 0 0, 1080 5184 Z"/>
 			<text x="756" y="5205" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 				<tspan x="756" dy="72" unicode-bidi="embed">Return Integer book1</tspan>
 			</text>
 		</g>
 		<g>
 			<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="756,540 756,627"/>
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 				<text x="756" y="417" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="756" dy="72" unicode-bidi="embed">Book*book = book1</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 432,648 L 432,792 L 1080,792 L 1080,648 Z"/>
 				<text x="756" y="669" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="756" dy="72" unicode-bidi="embed">Book*pre = book1</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 324,900 L 216,1116 L 1188,1116 L 1296,900 Z"/>
 				<text x="756" y="921" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="756" dy="72" unicode-bidi="embed">Output printf</tspan>
 					<tspan x="756" dy="72" unicode-bidi="embed">(&quot;&#36755;&#20837;&#35201;&#22788;&#29702;&#26087;&#20070;&#30340;&#32534;&#21495;:&quot;);</tspan>
 				</text>
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 			<g>
 				<path fill="#FFFFD0" stroke="#A0A070" stroke-width="5" stroke-dasharray="none" d="M 540,1224 L 540,1404 L 972,1404 L 972,1224 Z"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="5" stroke-dasharray="none" points="540,1260 972,1260"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="5" stroke-dasharray="none" points="576,1224 576,1404"/>
 				<text x="774" y="1281" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="774" dy="72" unicode-bidi="embed">Integer id</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C0E0FF" stroke="#6080A0" stroke-width="5" stroke-dasharray="none" d="M 612,1512 L 540,1656 L 900,1656 L 972,1512 Z"/>
 				<text x="756" y="1533" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="756" dy="72" unicode-bidi="embed">Input id</tspan>
 				</text>
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 				<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="2088,4320 2088,4428 828,4428 828,1964"/>
 				<polygon fill="#404040" stroke="none" points="828,1944 807,1978 848,1978"/>
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 					<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="2412,2196 4212,2196 4212,2427"/>
 					<polygon fill="#404040" stroke="none" points="4212,2448 4232,2413 4191,2413"/>
 					<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="4212,4140 4212,4284 2144,4284"/>
 					<polygon fill="#404040" stroke="none" points="2124,4284 2158,4304 2158,4263"/>
 					<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="1764,2196 1476,2196 1476,2427"/>
 					<polygon fill="#404040" stroke="none" points="1476,2448 1496,2413 1455,2413"/>
 					<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="1476,2736 1476,4284 2031,4284"/>
 					<polygon fill="#404040" stroke="none" points="2052,4284 2017,4263 2017,4304"/>
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 						<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 2088,2016 L 1728,2196 L 2088,2376 L 2448,2196 Z"/>
 						<text x="2088" y="2145" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="2088" dy="72" unicode-bidi="embed">id==book-&gt;iNUm</tspan>
 						</text>
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 						<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="4500,2628 4932,2628 4932,2859"/>
 						<polygon fill="#404040" stroke="none" points="4932,2880 4952,2845 4911,2845"/>
 						<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="4932,3312 4932,4104 4268,4104"/>
 						<polygon fill="#404040" stroke="none" points="4248,4104 4282,4124 4282,4083"/>
 						<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="3924,2628 3168,2628 3168,2859"/>
 						<polygon fill="#404040" stroke="none" points="3168,2880 3188,2845 3147,2845"/>
 						<polyline fill="none" stroke="#404040" stroke-width="9" stroke-dasharray="none" points="3168,3960 3168,4104 4155,4104"/>
 						<polygon fill="#404040" stroke="none" points="4176,4104 4141,4083 4141,4124"/>
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 							<path fill="#FFD0D0" stroke="#A07070" stroke-width="5" stroke-dasharray="none" d="M 4212,2448 L 3888,2628 L 4212,2808 L 4536,2628 Z"/>
 							<text x="4212" y="2577" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="4212" dy="72" unicode-bidi="embed">book1==book</tspan>
 							</text>
 						</g>
 						<g>
 							<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 4500,2880 L 4284,3312 L 5364,3312 L 5580,2880 Z"/>
 							<text x="4932" y="2901" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="4932" dy="72" unicode-bidi="embed">Output book = book-&gt;next</tspan>
 								<tspan x="4932" dy="72" unicode-bidi="embed">;&#13;</tspan>
 								<tspan x="4932" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;free</tspan>
 								<tspan x="4932" dy="72" unicode-bidi="embed">(prev);&#13;</tspan>
 								<tspan x="4932" dy="72" unicode-bidi="embed">&#9;&#9;&#9;&#9;return book;</tspan>
 							</text>
 						</g>
 						<g>
 							<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 2736,2880 L 2196,3960 L 3600,3960 L 4140,2880 Z"/>
 							<text x="3168" y="2901" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="3168" dy="72" unicode-bidi="embed">Output prev-&gt;next = book-&gt;</tspan>
 								<tspan x="3168" dy="72" unicode-bidi="embed">next</tspan>
 								<tspan x="3168" dy="72" unicode-bidi="embed">;&#13;</tspan>
 								<tspan x="3168" dy="72" unicode-bidi="embed">&#9;&#9;&#9;free(book);                     //</tspan>
 								<tspan x="3168" dy="72" unicode-bidi="embed"> free</tspan>
 								<tspan x="3168" dy="72" unicode-bidi="embed">():&#37322;&#25918;&#36164;&#28304;&#13;</tspan>
 								<tspan x="3168" dy="72" unicode-bidi="embed">&#9;&#9;&#9;printf</tspan>
 								<tspan x="3168" dy="72" unicode-bidi="embed">(&quot;&#24050;&#23558;&#26087;&#20070;&#22788;&#29702;&#25481;!\</tspan>
 								<tspan x="3168" dy="72" unicode-bidi="embed">n&quot;);&#13;</tspan>
 								<tspan x="3168" dy="72" unicode-bidi="embed">&#9;&#9;&#9;printf(&quot;&#25353;&#20219;&#24847;&#38190;&#36820;&#22238;\</tspan>
 								<tspan x="3168" dy="72" unicode-bidi="embed">n&quot;);&#13;</tspan>
 								<tspan x="3168" dy="72" unicode-bidi="embed">&#9;&#9;&#9;getchar</tspan>
 								<tspan x="3168" dy="72" unicode-bidi="embed">();&#13;</tspan>
 								<tspan x="3168" dy="72" unicode-bidi="embed">&#9;&#9;&#9;return book1;</tspan>
 							</text>
 						</g>
 						<ellipse cx="4212" cy="4104" rx="36" ry="36" fill="#FFD0D0" stroke="#A07070" stroke-width="5"/>
 						<text x="4644" y="2505" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="4644" dy="72" unicode-bidi="embed">True</tspan>
 						</text>
 						<text x="3762" y="2505" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="3762" dy="72" unicode-bidi="embed">False</tspan>
 						</text>
 					</g>
 					<g>
 						<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 1152,2448 L 1008,2736 L 1800,2736 L 1944,2448 Z"/>
 						<text x="1476" y="2469" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="1476" dy="72" unicode-bidi="embed">Output prev = book</tspan>
 							<tspan x="1476" dy="72" unicode-bidi="embed">;&#13;</tspan>
 							<tspan x="1476" dy="72" unicode-bidi="embed">&#9;&#9;book = book-&gt;next;</tspan>
 						</text>
 					</g>
 					<ellipse cx="2088" cy="4284" rx="36" ry="36" fill="#C04040" stroke="#602020" stroke-width="5"/>
 					<text x="2556" y="2073" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="2556" dy="72" unicode-bidi="embed">True</tspan>
 					</text>
 					<text x="1602" y="2073" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="1602" dy="72" unicode-bidi="embed">False</tspan>
 					</text>
 				</g>
 				<g>
 					<path fill="#FFE0A0" stroke="#A08040" stroke-width="5" stroke-dasharray="none" d="M 504,1800 L 432,1872 L 504,1944 L 1008,1944 L 1080,1872 L 1008,1800 Z"/>
 					<text x="756" y="1821" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="756" dy="72" unicode-bidi="embed">book!=NULL</tspan>
 					</text>
 				</g>
 				<text x="1188" y="1749" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1188" dy="72" unicode-bidi="embed">True</tspan>
 				</text>
 				<text x="630" y="1965" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="630" dy="72" unicode-bidi="embed">False</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C04040" stroke="#602020" stroke-width="5" stroke-dasharray="none" d="M 396,4572 L 144,5076 L 1116,5076 L 1368,4572 Z"/>
 				<text x="756" y="4593" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="756" dy="72" unicode-bidi="embed">Output printf</tspan>
 					<tspan x="756" dy="72" unicode-bidi="embed">(&quot;&#27809;&#26377;&#25214;&#21040;&#35813;&#22270;&#20070;\</tspan>
 					<tspan x="756" dy="72" unicode-bidi="embed">n&quot;);&#13;</tspan>
 					<tspan x="756" dy="72" unicode-bidi="embed">&#9;printf(&quot;&#25353;&#20219;&#24847;&#38190;&#36820;&#22238;\</tspan>
 					<tspan x="756" dy="72" unicode-bidi="embed">n&quot;);&#13;</tspan>
 					<tspan x="756" dy="72" unicode-bidi="embed">&#9;getchar();</tspan>
 				</text>
 			</g>
 		</g>
 	</g>
 </svg>
--- a/images/foundbook.svg
+++ b/images/foundbook.svg
@ -0,0 +1,145 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <!-- Created by Flowgorithm 3.4.2 (http://flowgorithm.org) -->
 <svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" version="1.1" width="3504" height="5376">
 	<rect x="0" y="0" width="3504" height="5376" fill="#FFFFFF"/>
 	<g>
 		<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="864,384 864,501"/>
 		<polygon fill="#404040" stroke="none" points="864,528 890,481 837,481"/>
 		<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="864,4848 864,4965"/>
 		<polygon fill="#404040" stroke="none" points="864,4992 890,4945 837,4945"/>
 		<g>
 			<path fill="#F0E0FF" stroke="#9070A0" stroke-width="6" stroke-dasharray="none" d="M 624,192 A 96 96, 0, 0 0, 624 384 L 1104,384 A 96 96, 0, 0 0, 1104 192 Z"/>
 			<text x="864" y="220" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 				<tspan x="864" dy="96" unicode-bidi="embed">foundbook</tspan>
 			</text>
 		</g>
 		<g>
 			<path fill="#F0E0FF" stroke="#9070A0" stroke-width="6" stroke-dasharray="none" d="M 672,4992 A 96 96, 0, 0 0, 672 5184 L 1056,5184 A 96 96, 0, 0 0, 1056 4992 Z"/>
 			<text x="864" y="5020" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 				<tspan x="864" dy="96" unicode-bidi="embed">End</tspan>
 			</text>
 		</g>
 		<g>
 			<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="864,768 864,885"/>
 			<polygon fill="#404040" stroke="none" points="864,912 890,865 837,865"/>
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 			<polygon fill="#404040" stroke="none" points="864,1296 890,1249 837,1249"/>
 			<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="864,1488 864,1605"/>
 			<polygon fill="#404040" stroke="none" points="864,1632 890,1585 837,1585"/>
 			<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="864,1824 864,1989"/>
 			<polygon fill="#404040" stroke="none" points="864,2016 890,1969 837,1969"/>
 			<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="864,2208 864,4293"/>
 			<polygon fill="#404040" stroke="none" points="864,4320 890,4273 837,4273"/>
 			<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="864,4512 864,4629"/>
 			<polygon fill="#404040" stroke="none" points="864,4656 890,4609 837,4609"/>
 			<g>
 				<path fill="#FFFFD0" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" d="M 528,528 L 528,768 L 1200,768 L 1200,528 Z"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" points="528,576 1200,576"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" points="576,528 576,768"/>
 				<text x="888" y="604" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="888" dy="96" unicode-bidi="embed">String book1</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#FFFFD0" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" d="M 576,912 L 576,1152 L 1152,1152 L 1152,912 Z"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" points="576,960 1152,960"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" points="624,912 624,1152"/>
 				<text x="888" y="988" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="888" dy="96" unicode-bidi="embed">Integer id</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 672,1296 L 576,1488 L 1056,1488 L 1152,1296 Z"/>
 				<text x="864" y="1324" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="864" dy="96" unicode-bidi="embed">Input id</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 576,1632 L 480,1824 L 1152,1824 L 1248,1632 Z"/>
 				<text x="864" y="1660" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="864" dy="96" unicode-bidi="embed">Input book1</tspan>
 				</text>
 			</g>
 			<g>
 				<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="1296,2112 2016,2112 2016,2277"/>
 				<polygon fill="#404040" stroke="none" points="2016,2304 2042,2257 1989,2257"/>
 				<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="2016,3984 2016,4128 960,4128 960,2234"/>
 				<polygon fill="#404040" stroke="none" points="960,2208 933,2254 986,2254"/>
 				<g>
 					<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="2016,3648 2016,3765"/>
 					<polygon fill="#404040" stroke="none" points="2016,3792 2042,3745 1989,3745"/>
 					<g>
 						<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="2448,2544 2784,2544 2784,2853"/>
 						<polygon fill="#404040" stroke="none" points="2784,2880 2810,2833 2757,2833"/>
 						<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="2784,3408 2784,3600 2090,3600"/>
 						<polygon fill="#404040" stroke="none" points="2064,3600 2110,3626 2110,3573"/>
 						<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="1584,2544 1200,2544 1200,3600 1941,3600"/>
 						<polygon fill="#404040" stroke="none" points="1968,3600 1921,3573 1921,3626"/>
 						<g>
 							<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 2016,2304 L 1536,2544 L 2016,2784 L 2496,2544 Z"/>
 							<text x="2016" y="2476" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 								<tspan x="2016" dy="96" unicode-bidi="embed">id==book-&gt;iNum</tspan>
 							</text>
 						</g>
 						<g>
 							<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="2784,3072 2784,3189"/>
 							<polygon fill="#404040" stroke="none" points="2784,3216 2810,3169 2757,3169"/>
 							<g>
 								<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 2352,2880 L 2256,3072 L 3216,3072 L 3312,2880 Z"/>
 								<text x="2784" y="2908" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 									<tspan x="2784" dy="96" unicode-bidi="embed">Output &#35813;&#20070;&#30340;&#20449;&#24687;</tspan>
 								</text>
 							</g>
 							<g>
 								<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 2496,3216 L 2400,3408 L 3072,3408 L 3168,3216 Z"/>
 								<text x="2784" y="3244" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 									<tspan x="2784" dy="96" unicode-bidi="embed">Input book</tspan>
 								</text>
 							</g>
 						</g>
 						<g>
 						</g>
 						<ellipse cx="2016" cy="3600" rx="48" ry="48" fill="#C04040" stroke="#602020" stroke-width="6"/>
 						<text x="2640" y="2380" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="2640" dy="96" unicode-bidi="embed">True</tspan>
 						</text>
 						<text x="1368" y="2380" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="1368" dy="96" unicode-bidi="embed">False</tspan>
 						</text>
 					</g>
 					<g>
 						<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 1488,3792 L 1392,3984 L 2544,3984 L 2640,3792 Z"/>
 						<text x="2016" y="3820" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 							<tspan x="2016" dy="96" unicode-bidi="embed">Output book=book-&gt;next</tspan>
 						</text>
 					</g>
 				</g>
 				<g>
 					<path fill="#C04040" stroke="#602020" stroke-width="6" stroke-dasharray="none" d="M 528,2016 L 432,2112 L 528,2208 L 1200,2208 L 1296,2112 L 1200,2016 Z"/>
 					<text x="864" y="2044" fill="#FFFFFF" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 						<tspan x="864" dy="96" unicode-bidi="embed">book&#65281;=NULL</tspan>
 					</text>
 				</g>
 				<text x="1440" y="1948" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="1440" dy="96" unicode-bidi="embed">True</tspan>
 				</text>
 				<text x="696" y="2236" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="696" dy="96" unicode-bidi="embed">False</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#D0FFD0" stroke="#70A070" stroke-width="6" stroke-dasharray="none" d="M 384,4320 L 288,4512 L 1344,4512 L 1440,4320 Z"/>
 				<text x="864" y="4348" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="864" dy="96" unicode-bidi="embed">Output &#27809;&#26377;&#25214;&#21040;&#35813;&#20070;</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 288,4656 L 192,4848 L 1440,4848 L 1536,4656 Z"/>
 				<text x="864" y="4684" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="864" dy="96" unicode-bidi="embed">Input &#38656;&#35201;&#26597;&#25214;&#30340;&#19979;&#19968;&#26412;&#20070;</tspan>
 				</text>
 			</g>
 		</g>
 	</g>
 </svg>
--- a/images/foundreaderinfo.svg
+++ b/images/foundreaderinfo.svg
@ -0,0 +1,193 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <!-- Created by Flowgorithm 3.4.2 (http://flowgorithm.org) -->
 <svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" version="1.1" width="6432" height="7008">
 	<rect x="0" y="0" width="6432" height="7008" fill="#FFFFFF"/>
 	<g>
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 		<polygon fill="#404040" stroke="none" points="720,6624 746,6577 693,6577"/>
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 			<path fill="#F0E0FF" stroke="#9070A0" stroke-width="6" stroke-dasharray="none" d="M 384,192 A 96 96, 0, 0 0, 384 384 L 1056,384 A 96 96, 0, 0 0, 1056 192 Z"/>
 			<text x="720" y="220" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 				<tspan x="720" dy="96" unicode-bidi="embed">foundreaderinfo</tspan>
 			</text>
 		</g>
 		<g>
 			<path fill="#F0E0FF" stroke="#9070A0" stroke-width="6" stroke-dasharray="none" d="M 528,6624 A 96 96, 0, 0 0, 528 6816 L 912,6816 A 96 96, 0, 0 0, 912 6624 Z"/>
 			<text x="720" y="6652" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 				<tspan x="720" dy="96" unicode-bidi="embed">End</tspan>
 			</text>
 		</g>
 		<g>
 			<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="720,768 720,885"/>
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 			<polygon fill="#404040" stroke="none" points="720,1296 746,1249 693,1249"/>
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 			<polygon fill="#404040" stroke="none" points="720,1632 746,1585 693,1585"/>
 			<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="720,1824 720,1989"/>
 			<polygon fill="#404040" stroke="none" points="720,2016 746,1969 693,1969"/>
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 			<polygon fill="#404040" stroke="none" points="720,5952 746,5905 693,5905"/>
 			<polyline fill="none" stroke="#404040" stroke-width="12" stroke-dasharray="none" points="720,6144 720,6261"/>
 			<polygon fill="#404040" stroke="none" points="720,6288 746,6241 693,6241"/>
 			<g>
 				<path fill="#FFFFD0" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" d="M 336,528 L 336,768 L 1104,768 L 1104,528 Z"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" points="336,576 1104,576"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" points="384,528 384,768"/>
 				<text x="744" y="604" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="744" dy="96" unicode-bidi="embed">String reader1</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#FFFFD0" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" d="M 432,912 L 432,1152 L 1008,1152 L 1008,912 Z"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" points="432,960 1008,960"/>
 				<polyline fill="none" stroke="#A0A070" stroke-width="6" stroke-dasharray="none" points="480,912 480,1152"/>
 				<text x="744" y="988" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="744" dy="96" unicode-bidi="embed">Integer id</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 528,1296 L 432,1488 L 912,1488 L 1008,1296 Z"/>
 				<text x="720" y="1324" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="720" dy="96" unicode-bidi="embed">Input id</tspan>
 				</text>
 			</g>
 			<g>
 				<path fill="#C0E0FF" stroke="#6080A0" stroke-width="6" stroke-dasharray="none" d="M 432,1632 L 336,1824 L 1008,1824 L 1104,1632 Z"/>
 				<text x="720" y="1660" fill="#000000" font-family="Arial" font-size="32pt" text-anchor="middle" direction="ltr">
 					<tspan x="720" dy="96" unicode-bidi="embed">Input reader</tspan>
 				</text>
 			</g>
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                    </div>
                </foreignObject>
                <text x="224" y="449" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
                    查询图书馆藏书信息
                </text>
            </switch>
        </g>
        <path d="M 124 550 L 157.63 550" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 162.88 550 L 155.88 553.5 L 157.63 550 L 155.88 546.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 64 580 L 64 613.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 64 618.88 L 60.5 611.88 L 64 613.63 L 67.5 611.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 64 520 L 124 550 L 64 580 L 4 550 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 550px; margin-left: 5px;">
                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
                                <font style="font-size: 18px;">
                                    选择3
                                </font>
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="64" y="554" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
                    选择3
                </text>
            </switch>
        </g>
        <path d="M 284 550 L 427.63 550" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 432.88 550 L 425.88 553.5 L 427.63 550 L 425.88 546.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <rect x="164" y="520" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 550px; margin-left: 165px;">
                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
                                <font style="font-size: 18px;">
                                    存入新书
                                </font>
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="224" y="554" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
                    存入新书
                </text>
            </switch>
        </g>
        <path d="M 129 650 L 157.63 650" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 162.88 650 L 155.88 653.5 L 157.63 650 L 155.88 646.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 66.75 679.88 L 66.95 703.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 66.99 708.88 L 63.43 701.91 L 66.95 703.63 L 70.43 701.85 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 66.5 620 L 129 650 L 66.5 680 L 4 650 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 123px; height: 1px; padding-top: 650px; margin-left: 5px;">
                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                            <div style="display: inline-block; font-size: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
                                选择4
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="67" y="655" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    选择4
                </text>
            </switch>
        </g>
        <path d="M 284 650 L 427.63 650" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 432.88 650 L 425.88 653.5 L 427.63 650 L 425.88 646.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <rect x="164" y="620" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 650px; margin-left: 165px;">
                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                            <div style="display: inline-block; font-size: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
                                旧书处理
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="224" y="655" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    旧书处理
                </text>
            </switch>
        </g>
        <path d="M 67.61 769.5 L 68.91 804.14" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 69.1 809.38 L 65.34 802.52 L 68.91 804.14 L 72.34 802.26 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 132.75 740 L 157.63 740" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 162.88 740 L 155.88 743.5 L 157.63 740 L 155.88 736.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 66.5 710 L 132.75 740 L 66.5 770 L 0.25 740 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 131px; height: 1px; padding-top: 740px; margin-left: 1px;">
                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                            <div style="display: inline-block; font-size: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
                                选择5
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="67" y="745" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    选择5
                </text>
            </switch>
        </g>
        <path d="M 284 740 L 427.63 740" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 432.88 740 L 425.88 743.5 L 427.63 740 L 425.88 736.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <rect x="164" y="710" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 740px; margin-left: 165px;">
                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                            <div style="display: inline-block; font-size: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
                                查找图书
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="224" y="745" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    查找图书
                </text>
            </switch>
        </g>
        <path d="M 70.25 870 L 70.25 903.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 70.25 908.88 L 66.75 901.88 L 70.25 903.63 L 73.75 901.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 136.5 840 L 157.63 840" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 162.88 840 L 155.88 843.5 L 157.63 840 L 155.88 836.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 70.25 810 L 136.5 840 L 70.25 870 L 4 840 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 131px; height: 1px; padding-top: 840px; margin-left: 5px;">
                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                            <div style="display: inline-block; font-size: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
                                选择6
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="70" y="845" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    选择6
                </text>
            </switch>
        </g>
        <path d="M 284 840 L 427.63 840" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 432.88 840 L 425.88 843.5 L 427.63 840 L 425.88 836.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <rect x="164" y="810" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 840px; margin-left: 165px;">
                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                            <div style="display: inline-block; font-size: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
                                查询读者的借阅信息
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="224" y="845" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    查询读者的借阅信息
                </text>
            </switch>
        </g>
        <path d="M 136.5 940 L 167.63 940" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 172.88 940 L 165.88 943.5 L 167.63 940 L 165.88 936.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 70.25 970 L 70.25 1043.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 70.25 1048.88 L 66.75 1041.88 L 70.25 1043.63 L 73.75 1041.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 70.25 910 L 136.5 940 L 70.25 970 L 4 940 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 131px; height: 1px; padding-top: 940px; margin-left: 5px;">
                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                            <div style="display: inline-block; font-size: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
                                选择7
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="70" y="945" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    选择7
                </text>
            </switch>
        </g>
        <path d="M 294 940 L 427.63 940" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 432.88 940 L 425.88 943.5 L 427.63 940 L 425.88 936.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <rect x="174" y="910" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 940px; margin-left: 175px;">
                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                            <div style="display: inline-block; font-size: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
                                查询读者信息
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="234" y="945" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    查询读者信息
                </text>
            </switch>
        </g>
        <path d="M 70.25 1110 L 70.25 1183.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 70.25 1188.88 L 66.75 1181.88 L 70.25 1183.63 L 73.75 1181.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 136.5 1080 L 167.63 1080" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 172.88 1080 L 165.88 1083.5 L 167.63 1080 L 165.88 1076.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 70.25 1050 L 136.5 1080 L 70.25 1110 L 4 1080 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 131px; height: 1px; padding-top: 1080px; margin-left: 5px;">
                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                            <div style="display: inline-block; font-size: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
                                选择8
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="70" y="1085" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    选择8
                </text>
            </switch>
        </g>
        <path d="M 70.25 1250 L 70.25 1323.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 70.25 1328.88 L 66.75 1321.88 L 70.25 1323.63 L 73.75 1321.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 136.5 1220 L 167.63 1220" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 172.88 1220 L 165.88 1223.5 L 167.63 1220 L 165.88 1216.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 70.25 1190 L 136.5 1220 L 70.25 1250 L 4 1220 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 131px; height: 1px; padding-top: 1220px; margin-left: 5px;">
                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                            <div style="display: inline-block; font-size: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
                                选择9
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="70" y="1225" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    选择9
                </text>
            </switch>
        </g>
        <path d="M 70.25 1390 L 70.25 1463.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 70.25 1468.88 L 66.75 1461.88 L 70.25 1463.63 L 73.75 1461.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 136.5 1360 L 167.63 1360" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 172.88 1360 L 165.88 1363.5 L 167.63 1360 L 165.88 1356.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 70.25 1330 L 136.5 1360 L 70.25 1390 L 4 1360 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 131px; height: 1px; padding-top: 1360px; margin-left: 5px;">
                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                            <div style="display: inline-block; font-size: 18px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
                                选择10
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="70" y="1365" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    选择10
                </text>
            </switch>
        </g>
        <path d="M 70.25 1530 L 70.25 1603.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
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        <path d="M 172.88 1500 L 165.88 1503.5 L 167.63 1500 L 165.88 1496.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <path d="M 70.25 1470 L 136.5 1500 L 70.25 1530 L 4 1500 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
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            <switch>
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                                选择11
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            <switch>
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                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 131px; height: 1px; padding-top: 1640px; margin-left: 5px;">
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                                选择0
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                        </div>
                    </div>
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                    选择0
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        <rect x="12.75" y="1714" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
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            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
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                                结束
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                        </div>
                    </div>
                </foreignObject>
                <text x="73" y="1749" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    结束
                </text>
            </switch>
        </g>
        <path d="M 294 1080 L 427.63 1080" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
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            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
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                                读者借书
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                        </div>
                    </div>
                </foreignObject>
                <text x="234" y="1085" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    读者借书
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            </switch>
        </g>
        <path d="M 294 1220 L 427.63 1220" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 432.88 1220 L 425.88 1223.5 L 427.63 1220 L 425.88 1216.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
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        <g transform="translate(-0.5 -0.5)">
            <switch>
                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
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                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
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                                读者还书
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="234" y="1225" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    读者还书
                </text>
            </switch>
        </g>
        <path d="M 294 1360 L 427.63 1360" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 432.88 1360 L 425.88 1363.5 L 427.63 1360 L 425.88 1356.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <rect x="174" y="1330" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
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                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 1360px; margin-left: 175px;">
                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
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                                文件保存
                            </div>
                        </div>
                    </div>
                </foreignObject>
                <text x="234" y="1365" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="18px" text-anchor="middle">
                    文件保存
                </text>
            </switch>
        </g>
        <path d="M 294 1500 L 427.63 1500" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
        <path d="M 432.88 1500 L 425.88 1503.5 L 427.63 1500 L 425.88 1496.5 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
        <rect x="174" y="1470" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
        <g transform="translate(-0.5 -0.5)">
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                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 1500px; margin-left: 175px;">
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                                从文件读取
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                        </div>
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                    从文件读取
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--- a/图书管理系统.c
+++ b/图书管理系统.c
@ -95,21 +95,429 @@ void ShowLibInfo(const Book* book1, const Reader* reader1)
 }
 //C3
 void ShowLibBook(Book* book1)
 {
    Book* book = book1;
    while (book != NULL)
    {                     // \t :制表符
        printf("%d\t%s\t%s\t%s\t%d\n", book->iNum, book->acName, book->acAuthor, book->acPress, book->iAmount);
        book = book->next;
    }
    printf("\n按任意键返回\n");
    getchar();
    return;
 }
 //C4
-
+Book* AddBook(Book* book1)
 {
    Book* book = book1;
    if (book == NULL)
    {
        Book* tmp = (Book*)malloc(sizeof(Book));
        tmp->next = NULL;
        assert(tmp);
        printf("输入书的编号:");
        scanf("%d", &tmp->iNum);
        getchar();
        printf("输入书的名称:");
        gets(&tmp->acName);
        printf("输入书的作者:");
        gets(tmp->acAuthor);
        printf("输入书的出版社:");
        gets(tmp->acPress);
        printf("输入书的库存量:");
        scanf("%d", &tmp->iAmount);
        book = tmp;
        printf("按任意键返回\n");
        getchar();
        return book;
        return;
    }
    while (1)
    {
        while (book->next == NULL)
        {
            int flag = 1;
            while (flag)
            {
                Book* tmp = (Book*)malloc(sizeof(Book));
                tmp->next = NULL;
                assert(tmp);
                printf("输入书的编号:");
                scanf("%d", &tmp->iNum);
                getchar();
                printf("输入书的名称:");
                gets(&tmp->acName);
                printf("输入书的作者:");
                gets(tmp->acAuthor);
                printf("输入书的出版社:");
                gets(tmp->acPress);
                printf("输入书的库存量:");
                scanf("%d", &tmp->iAmount);
                book->next = tmp;
                printf("是否继续输入:1==>继续\t0==>结束\t");
                scanf("%d", &flag);
                getchar();
                if (flag == 0)
                {
                    printf("按任意键返回\n");
                    getchar();
                    return book1;
                }
            }
        }
        book = book->next;
    }
    printf("按任意键返回\n");
    getchar();
    return;
 }
 //C5
-
+Book* DealoldBook(Book* book1)
 {
    Book* book = book1;
    Book* prev = book1;
    printf("输入要处理旧书的编号:");
    int id;
    scanf("%d", &id);
    getchar();
    while (book != NULL)
    {
        if (id == book->iNum)
        {
            if (book1 == book)
            {
                book = book->next;
                free(prev);
                return book;
            }
            prev->next = book->next;
            free(book);                     // free():释放资源
            printf("已将旧书处理掉!\n");
            printf("按任意键返回\n");
            getchar();
            return book1;
        }
        prev = book;
        book = book->next;
    }
    printf("没有找到该图书\n");
    printf("按任意键返回\n");
    getchar();
    return book1;
 }
 //C6
-
+void foundBook(Book* book1)
 {
    Book* book = book1;
    printf("输入要查找的书的id:");
    int id;
    scanf("%d", &id);
    getchar();
    while (book != NULL)
    {
        if (id == book->iNum)
        {
            printf("该书的信息如下:\n");
            printf("%d\t%s\t%s\t%s\t%d\n", book->iNum, book->acName, book->acAuthor, book->acPress, book->iAmount);
            printf("按任意键返回\n");
            getchar();
            return;
        }
        book = book->next;
    }
    printf("没有找到该书!\n");
    printf("按任意键返回\n");
    getchar();
    return;
 }
 //C7
 void foundReader_Info(Reader* reader1)
 {
    Reader* reader = reader1; //备份
    printf("输入读者的id:");
    int id;
    scanf("%d", &id);
    getchar();
    while (reader)
    {
        if (id == reader->iNum)
        {
            printf("借阅的书的编号如下:\n");
            for (int i = 0; i < reader->iMax; i++)  //根据读者可以借阅的数量作为循环终止条件
            {
                if (reader->aiBookId[i] != 0)       //数组里不为0，证明有一条记录，因为：数组初始化为0，并且书的编号不可能为0
                {
                    printf("%d\n", reader->aiBookId[i]);
                }
            }
            printf("按任意键返回\n");
            getchar();
            return;
        }
        reader = reader->next;
    }
    printf("没有该读者!\n");
    printf("按任意键返回\n");
    getchar();
    return;
 }
 //C8
 void foundReaderInfo(Reader* reader1)
 {
    Reader* reader = reader1;
    printf("输入读者的id:");
    int id;
    scanf("%d", &id);
    getchar();
    while (reader)
    {
        if (id == reader->iNum)
        {
            printf("读者id:%d\n", reader->iNum);
            printf("读者姓名:%s\n", reader->acName);
            printf("读者性别:%s\n", reader->acSex);
            printf("读者职位:%s\n", reader->position);
            printf("读者已借阅书的数量:%d\n", reader->iAmount);
            printf("按任意键返回\n");
            getchar();
            return;
        }
        reader = reader->next;
    }
    printf("没有找到该读者\n");
    printf("按任意键返回\n");
    getchar();
    return;
 }
 //C9
 Reader* LendBook(Reader* reader1, Book* book1)
 {
    Reader* reader = reader1;
    Book* book = book1;
    Reader* prev = reader1;
    Reader* tmpp = reader1;
    printf("输入读者id:");
    int id;
    scanf("%d", &id);
    getchar();
    if (reader == NULL)
    {
        Reader* tmp = (Reader*)malloc(sizeof(Reader));
        tmp->next = NULL;
        tmp->iAmount = 0;
        tmp->iNum = id;
        printf("输入读者名字:");
        scanf("%s", &tmp->acName);
        getchar();
        printf("输入读者性别:");
        scanf("%s", &tmp->acSex);
        getchar();
        printf("输入读者职位:<student\tor\tteacher>");
        scanf("%s", &tmp->position);
        getchar();
        if (strcmp(tmp->position, "student") == 0)
        {
            tmp->iMax = 20;
            tmp->day = 30;
        }
        else {
            tmp->iMax = 40;
            tmp->day = 60;
        }
        for (int i = 0; i < tmp->iMax; i++)
        {
            tmp->aiBookId[i] = 0;
        }
        printf("输入要借的书的编号:");
        int id_book;
        scanf("%d", &id_book);
        getchar();
        while (book != NULL)
        {
            if (id_book == book->iNum)
            {
                if (book->iAmount <= 1)
                {
                    printf("借阅失败，该图书库存不足.\n");
                    printf("按任意键返回\n");
                    getchar();
                    return NULL;
                }
                if ((tmp->iAmount) + 1 > tmp->iMax)
                {
                    printf("借阅失败,该读者借阅图书数量已达上线.\n");
                    printf("按任意键返回\n");
                    getchar();
                    return NULL;
                }
                book->iAmount--;
                tmp->aiBookId[tmp->iAmount] = id_book;
                tmp->iAmount;
                reader = tmp;
                printf("借阅成功!\n");
                printf("按任意键返回\n");
                getchar();
                return reader;
            }
            book = book->next;
        }
        printf("没有找到该书!\n");
        printf("按任意键返回\n");
        getchar();
        return reader1;
    }
    if (reader != NULL)
    {
        while (reader != NULL)
        {
            if (id == reader->iNum)
            {
                printf("图使馆当前的书籍册:\n");
                ShowLibBook(book);
                printf("输入要借的书的编号:");
                int id_book;
                scanf("%d", &id_book);
                getchar();
                while (book != NULL)
                {
                    if (id_book == book->iNum)
                    {
                        if (book->iAmount <= 1)
                        {
                            printf("借阅失败，该图书库存不足.\n");
                            printf("按任意键返回\n");
                            getchar();
                            return reader1;
                        }
                        if (tmpp->iAmount + 1 > tmpp->iMax)
                        {
                            printf("借阅失败,该读者借阅图书数量已达上线.\n");
                            printf("按任意键返回\n");
                            getchar();
                            return reader1;
                        }
                        reader->iAmount++;
                        reader->aiBookId[tmpp->iAmount] = id_book;
                        return reader1;
                    }
                    book = book->next;
                }
                printf("没有找到该书!\n");
                printf("按任意键返回\n");
            }
            reader = reader->next;
        }
    }
 }
 //C10
 void returnBook(Reader* reader1, Book* book1)
 {
    Reader* reader = reader1;
    Book* book = book1;
    printf("请输入读者的id:");
    int id;
    scanf("%d", &id);
    getchar();
    if (reader != NULL)
    {
        while (reader != NULL)
        {
            if (id == reader->iNum)
            {
                printf("请输入要还的书的编号:");
                int id_book;
                scanf("%d", &id_book);
                getchar();
                for (int i = 0; i < reader->iMax; i++)
                {
                    if (reader->aiBookId[i] == id_book)
                    {
                        reader->aiBookId[i] = 0;
                        while (book)
                        {
                            if (id_book == book->iNum)
                            {
                                book->iAmount++;
                                printf("还书成功!\n");
                                printf("按任意键返回\n");
                                getchar();
                                return reader1;
                            }
                            book = book->next;
                        }
                    }
                }
                printf("没有找到该图书，检查图书的Id\n");
                printf("按任意键返回\n");
                getchar();
                return reader1;
            }
            reader = reader->next;
        }
        printf("没有找到该读者，检查读者id是否输入有误\n");
        printf("按任意键返回\n");
        getchar();
        return reader1;
    }
 }
 //C11
-
+void save(Book* book1)
-//C12
+{
    FILE* fp;
    Book* pCur = book1;
    int iCount = 0;
    if (pCur == NULL)
    {
        printf("\n没有学生记录!\n");
        return;
    }
    if ((fp = fopen("book.txt", "wb")) == NULL)
    {
        printf("创建文件失败!\n");
        getchar();
        exit(1);
    }
    while (pCur)
    {
        fwrite(pCur, sizeof(Book), 1, fp);
        pCur = pCur->next;
        iCount++;
    }
    printf("\n");
    printf("保存文件的数据数目为:%d\n", iCount);
    fclose(fp);
 }
 //C12
 Book* read1()
 {
    FILE* fp;
    Book* pHead = NULL, * pTemp = NULL, * pCur = NULL;
    if ((fp = fopen("book.txt", "r")) == NULL)
    {
        printf("\n文件打开失败!请检查文件名!\n");
        exit(0);
    }
    pTemp = (Book*)malloc(sizeof(Book));
    while (fread(pTemp, sizeof(Book), 1, fp))
    {
        if (!pHead)
        {
            pHead = pCur = pTemp;
        }
        else
        {
            pCur->next = pTemp;
            pCur = pTemp;
        }
        pTemp = (Book*)malloc(sizeof(Book));
    }
    fclose(fp);
    return pHead;
 }
Author	SHA1	Message	Date
王昊	2191c6e697	2	2 years ago
mac76tib2	bc97f229ad	Merge pull request '代码' (#17 ) from 代码 into master	2 years ago
王昊	9c4cf8f82a	j	2 years ago
王昊	32e13f677a	d	2 years ago
王昊	84cae3add4	f	2 years ago
孙艺哲	c903f0f79b	代码	2 years ago
张江楠	cf5739d1c0	Merge branch '流程图'	2 years ago
mac76tib2	82f2a72037	Merge pull request 'bookread' (#16 ) from bookread into master	2 years ago
mac76tib2	a36dd3ecc3	Merge pull request 'save' (#15 ) from save into master	2 years ago
mac76tib2	8edc26886e	Merge pull request 'return' (#13 ) from return into master	2 years ago
孙艺哲	6327f1616b	bookread	2 years ago
孙艺哲	4014066eed	save	2 years ago
张江楠	da9cd31f0d	liuchengtu	2 years ago
孙艺哲	30ca3f4606	return	2 years ago
mac76tib2	ff81767bc3	Merge pull request 'return' (#12 ) from C12 into master	2 years ago
孙艺哲	b1b5b7c491	returnbook	2 years ago
mac76tib2	cc9c382ce5	Merge pull request '2' (#11 ) from C6-C9lct into master	2 years ago
郭佳慧	5928591c34	1234	2 years ago
张江楠	e8fd1ceb58	Merge branch 'master' of https://bdgit.educoder.net/mac76tib2/libray	2 years ago
张江楠	e358e1afe3	d	2 years ago
郭佳慧	b3d9852e36	6789	2 years ago
mac76tib2	b2dde7601a	Merge pull request 'C6-C9' (#10 ) from C6-C9lct into master	2 years ago
郭佳慧	81f9f026d3	C6-C9lct	2 years ago
王昊	2188b48ae9	1	2 years ago
王昊	981ddd5225	wan	2 years ago
王昊	cc1e4b0b83	Merge branch 'c1'	2 years ago
王昊	cb38b93061	报告模板和c1流程图	2 years ago
mac76tib2	772293d0bf	Merge pull request '6-9' (#9 ) from 6-9 into master	2 years ago
王昊	3a7aa7daa1	Merge branch 'c1'	2 years ago
王昊	0ccba473b4	C1 流程图	2 years ago
王昊	f1a490517a	主流程图	2 years ago
王昊	e42d2cb82b	头文件	2 years ago
郭佳慧	56cd9be7c0	6-9	2 years ago
mac76tib2	f59ac84804	Merge pull request '11-12' (#8 ) from gggg into master	2 years ago
mac76tib2	b438b604b3	Merge pull request 'C5' (#7 ) from C5 into master	2 years ago
mac76tib2	9d8479d66b	Merge pull request 'C4' (#6 ) from C4 into master	2 years ago
mac76tib2	efe8272ee1	Merge pull request 'C3' (#5 ) from C3 into master	2 years ago
mac76tib2	9b10a9faf3	Merge pull request 'C2' (#4 ) from C2-查询图书馆信息模块 into master	2 years ago
孙艺哲	f4ef1ee251	c11-c12	2 years ago
张江楠	7e8d742ebe	C5	2 years ago
张江楠	80953ed0ec	C4	2 years ago
mac76tib2	ceacbf43bf	Merge pull request 'c10' (#3 ) from C10 into master	2 years ago
张江楠	0200c94d16	C3	2 years ago
孙艺哲	1c63c90e2a	vvv	2 years ago