C10-12

图书管理.c

@@ -121,18 +121,191 @@ void foundReaderInfo(Reader* reader1)
 //读者借书
 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;
+		}
+	}
+ 
+ 
+}
+
+
  
  
  //读者还书
 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);
 }
  
  //从文件读取
 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;
+
 
 }