图书馆借书代码
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int book_num = 0;
struct Book //书籍数据库
{
int id;
char name[20];
int state;
}book[50];
void book_panel(void) //书籍显示
{
printf("=======网上图书馆=======\n\n\n书籍编号 书籍名字 状态（1可借阅/2已借阅）\n\n");
for (int i = 0; i < book_num; i++)
{
printf("%d\t\t%s\t\t%d\n", book[i].id, book[i].name, book[i].state);
}
printf("\n\n=====================\n\n");
}
int if_book_id(int id) //判断编号
{
for (int i = 0; i < book_num; i++)
{
if (id == book[i].id)
{
return 1;
}
}
return 0;
}
int if_book_name(char name[]) //判断书籍名称
{
int ret = 0;
for (int i = 0; i < book_num; i++)
{
ret = strcmp(name, book[i].name);
if (ret == 0)
{
return 1;
}
}
return 0;
}
void panel(void) //开始界面
{
printf("=======网上图书馆=======\n\n\n 请选择你的身份：\n\n（1）管理员（2）学生\n (3) 退出\n\n\n");
}
void drop(void) //还书界面
{
int num = 0;
printf("\n\n=======还书界面=======\n\n请输入归还书籍编号：\n\n");
scanf("%d", &num);
for (int i = 0; i < book_num; i++)
{
if (num == book[i].id)
{
book[i].state = 1;
break;
}
}
}
void lend(void) //借书界面
{
int num = 0;
printf("\n\n=======借书界面=======\n\n请输入借书籍编号：\n\n");
scanf("%d", &num);
for (int i = 0; i < book_num; i++)
{
if (num == book[i].id)
{
book[i].state = 2;
break;
}
}
}
int add(void) //添加书籍界面
{
if (book_num == 50)
{
printf("添加失败\n已达最大图书储存数量\n\n");
system("pause");
return 0;
}
printf("==请输入书籍编号==\n");
scanf("%d", &book[book_num].id);
if (if_book_id(book[book_num].id) == 1)
{
printf("添加失败\n该编号已存在\n\n");
system("pause");
return 0;
}
printf("==请输入书籍名字==\n");
scanf("%s", &book[book_num].name);
getchar();
if (if_book_name(book[book_num].name) == 1)
{
printf("该书已存在\n\n");
system("pause");
return 0;
}
printf("==请选择书籍状态==\n(1)未借阅 （2）已借阅\n");
scanf("%d", &book[book_num].state);
if (book[book_num].state != 1 && book[book_num].state != 2)
{
printf("错误操作\n");
system("pause");
return 0;
}
else
{
printf("===添加已完成===\n");
book_num++;
system("pause");
return 0;
}
}
int del2(int id) //删除操作
{
int num = 0;
if (if_book_id(id) != 1)
{
printf("\n\n编号不存在\n");
system("pause");
return 0;
}
for (int i = 0; i < book_num; i++)
{
if (id == book[i].id)
{
num = i;
break;
}
}
for (int i = num + 1; i < book_num; i++)
{
book[i - 1] = book[i];
}
book_num--;
return 1;
}
int del(void) //删除界面
{
int num = 0;
printf("==请选择你要删除编号(-1退出)==\n");
scanf("%d", &num);
if (num == -1)
{
printf("\n\n===退出成功===\n");
system("pause");
return 0;
}
else
{
if (del2(num) == 1)
{
printf("\n\n===删除成功===\n");
system("pause");
return 0;
}
printf("\n\n===删除失败===\n");
system("pause");
return 0;
}
}
int lookup(void) //查找界面
{
int num = 0,num1=0;
char num3[20];
printf("请选择查找方式(-1 退出):\n\n(1) 编号 （2）书名 （3）状态 \n\n");
scanf("%d", &num);
if (num == -1)
{
printf("\n\n===退出成功===\n");
system("pause");
return 0;
}
if (num == 1)
{
printf("请输入书籍编号：");
scanf("%d", &num1);
for (int i = 0; i < book_num; i++)
{
if (num1 == book[i].id)
{
printf("%d \t\t%s \t\t%d\n", book[i].id, book[i].name, book[i].state);
system("pause");
return 0;
}
else
{
printf("此书暂时无法借阅\n");
system("pause");
return 0;
}
}
}
else if (num == 2)
{
printf("请输入书名：");
scanf("%s", &num3);
for (int i = 0; i < book_num; i++)
{
if (strcmp(num3, book[i].name)==0)
{
printf("%d \t\t%s \t\t%d\n", book[i].id, book[i].name, book[i].state);
system("pause");
return 0;
}
else
{
printf("此书暂时无法借阅\n");
system("pause");
return 0;
}
}
}
else if(num==3)
{
printf("请输入书籍状态(1未借阅/2已借阅）：");
scanf("%d", &num1);
for (int i = 0; i < book_num; i++)
{
if (num1 == book[i].state)
{
printf("%d \t\t%s \t\t%d\n", book[i].id, book[i].name, book[i].state);
}
}
system("pause");
return 0;
}
else
{
printf("没有此操作\n");
system("pause");
return 0;
}
}
int change(void) //修改界面
{
int num1 = 0;
printf("==请选择你要修改编号(-1退出)==\n");
scanf("%d", &num1);
if (num1 == -1)
{
printf("\n\n===退出成功===\n");
system("pause");
return 0;
}
if (del2(num1) == 1)
{
add();
return 0;
}
}
void sort(void) //排序操作
{
int num = 0;
for (int j = 1; j < book_num; j++)
{
for (int i = 1;i <book_num; i++)
{
if (book[i - 1].id > book[i].id)
{
num = book[i - 1].id;
book[i - 1].id = book[i].id;
book[i].id = num;
}
}
}
printf("\n\n===完成排序===\n");
system("pause");
}
void administrator2(void)
{
printf("=========管理界面=========\n\n\n请选择你的操作\n\n(1）添加 （2）删除 （3）查找\n(4) 修改 （5）排序(6）退出\n ");
}
void administrator(void) //管理界面
{
book_panel();
int num = 0;
administrator2();
while (num != 6)
{
scanf("%d", &num);
switch (num)
{
case 1:add(); system("cls"); book_panel(); administrator2(); break;
case 2:del(); system("cls"); book_panel(); administrator2(); break;
case 3:lookup(); system("cls"); book_panel(); administrator2(); break;
case 4:change(); system("cls"); book_panel(); administrator2(); break;
case 5:sort(); system("cls"); book_panel(); administrator2(); break;
case 6:printf("退出程序中\n"); system("pause"); break;
default:
printf("没有此操作\n"); system("pause"); system("cls"); book_panel(); administrator2(); break;
}
}
}
void student2(void)
{
printf("========学生界面=======\n\n\n请选择你的操作\n\n(1) 还书 （2）借书 （3）退出\n");
}
void student(void) //学生界面
{
book_panel();
int num = 0;
student2();
while (num != 3)
{
scanf("%d", &num);
switch (num)
{
case 1:drop(); system("pause"); system("cls"); book_panel(); student2(); break;
case 2:lend(); system("pause"); system("cls"); book_panel(); student2(); break;
case 3:printf("退出程序中\n"); system("pause"); break;
default:
printf("没有此操作\n"); system("pause"); system("cls"); book_panel(); student2(); break;
}
}
}
int main()
{
int num = 0;
panel();
while (num != 3)
{
scanf("%d", &num);
switch (num)
{
case 1:system("cls"); administrator(); system("cls"); panel(); break;
case 2:system("cls");student(); system("cls"); panel(); break;
case 3:printf("退出程序中\n"); system("pause"); break;
default:printf("没有此操作\n"); system("pause"); system("cls"); panel(); break;
}
}
}
总结：
1.该代码的个个界面不是很好，可以再次优化；
2.在写代码时多次卡壳，思路不是很清晰；
3.做为所写的第一个程序，我对于他的表现不是很好，可能是写之前对于他的期待太高；
4.下次再写代码之前一定要想好主要的功能，在写的时候再去想每个功能要如何去写。我在写这个程序之前花了一天时间去想如何写，这是不好的，下次要改正。
