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#include<stdio.h>
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#include<stdlib.h>
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#include<string.h>
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#include<conio.h>
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#include<windows.h>
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//书店存货结构体
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struct BookStore
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{
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char name[100];
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//书籍的名称?
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char author[100];
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//?作者?
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char publish[100];
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//出版社
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long date;
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//出版日期
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double price;
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//价格
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int location;
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//在目录中的位置
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int count;
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//当前图书的数量
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int exist;
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//图书是否被借出
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}typedef books;
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struct BookStore a[5]=
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{
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{"C语言程序设计","童启","电子工业出版社",2018.2,49.00,1,100},
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{"高等数学","同济大学数学系","高等教育出版社",2018.6,47.60,2,100},
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{"21天学通C++","刘蕾","""电子工业出版社",2014.1,59.80,3,100},
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{"算法基础","Richard E.Neapolitan","人民邮电出版社",2016.3,99.00,4,100},
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{"Java从入门到精通","明日科技","清华大学出版社",2016.10,69.60,5,100},
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};
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void display();
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int main()
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{
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system("title 书店存货清单");
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display();
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int i=0,n=0,flag=0,j=0;
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double sum=0;
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char c,name[100];
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printf("\n\n\n\n\n\n\n\n\n\n\n");
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printf(" 欢迎光临本书店，");
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flag1:
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printf("请输入你所需要的书籍名字：");
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fflush(stdin);
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//清空输入缓冲区,为了确保不影响后面的数据读取
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gets(name);
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for(i=0;i<5;i++)
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{
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j++;
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//j加到5说明未找到该书籍
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if(strcmp(a[i].name,name)==0)
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{
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printf("书名：");
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puts(a[i].name);
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printf(" 作者：");
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puts(a[i].author);
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printf(" 出版社：");
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puts(a[i].publish);
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printf(" 出版日期：%d\n",a[i].date);
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printf(" 价格：%.2lf\n",a[i].price);
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printf(" 位置：%d\n",a[i].location);
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printf(" 库存：%d\n",a[i].count);
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printf(" 请输入所需数量：");
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fflush(stdin);
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scanf("%d",&n);
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if(n<=a[i].count){
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sum=n*a[i].price;
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printf(" 总价为：%.2lf\n",sum);
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}
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else
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printf(" 所需数量不在库存范围内\n");
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printf(" 是否还想买其他书籍？（Y/N）\n");
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fflush(stdin);
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scanf("%c",&c);
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if(c=='y'||c=='Y')
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goto flag1;
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else if(c=='n'||c=='N')
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{
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j=0;
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//当要退出时使j清0，防止当所找书籍位置为5时跳出for循环而误入下一个if语句
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printf(" 谢谢使用，再见！\n");
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return 0;
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}
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}
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}
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if(j==5)
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{
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j=0;
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printf(" 未查找到该书籍，请重新输入\n");
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goto flag1;
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}
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else
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{
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j=0;
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printf(" 未查找到该书籍，请重新输入\n");
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goto flag1;
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}
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return 0;
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}
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void display()
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{
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printf("欢迎使用书店存货清单\n");
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printf(" ——计算机1801班罗锐、雷湘辉\n\n");
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printf(" (请按任意键继续) ");
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getch();
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system("cls");
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system("cls");
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}
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