C语言课程设计——图书馆查询系统

为了方便图书查询，我们编写了这个图书馆查询系统，通过将图书的信息输入进这个系统，我们便可以直到图书的相关情况。图书管理员存入图书信息，使用者可以通过选项实现查询图书借阅信息，借取图书，归还图书，查看图书热度榜等操作。

#define _CRT_SECURE_NO_WARNINGS#include "stdio.h"#include "string.h"#include "windows.h"#include "stdlib.h"struct book{char book_name[20];char book_num[20];char date[11]="0000/00/00"; int flag=1;int heat=0;};void search(struct book *a,char b[20],int n){int t = 0;for (int i = 0; i < n; i++){if (strcmp(b, a[i].book_name) == 0){t++;printf("\n查找结果为：（图书名称 图书编号 上次借出日期 状态）\n%s %s %s ", a[i].book_name, a[i].book_num,a[i].date); //查找书籍数据if (a[i].flag==1){printf("该书未借出\n\n");}else{printf("该书已借出\n\n");}}}if (t==0){printf("没有该图书信息\n");}}void borrow(struct book *a,int n){printf("请输入您要借取的图书编号:\n");char name[20];scanf("%s", name);int x = 0;for (int i = 0; i < n; i++){if (strcmp(name, a[i].book_num) == 0){if (a[i].flag==1){x++;a[i].flag = 0;a[i].heat++;printf("\n请填写借出日期:(如/10/31)\n");scanf("%s", a[i].date);printf("\n恭喜你成功借阅!\n\n");}else{printf("\n这本书已经借出！\n\n");}}}if (x==0){printf("\n该书不存在！\n\n");}}void returnbook(struct book* a, int n){printf("请输入您要归还的图书编号:\n");char name[20];int t = 0;scanf("%s", name);for (int i = 0; i < n; i++){if (strcmp(name, a[i].book_num) == 0&&a[i].flag==0){t++;a[i].flag = 1;printf("\n恭喜你成功归还!\n\n");}}if (t==0){printf("\n该书未借出或图书编号错误!\n\n");}}void chart(struct book *a,int n){for (int i = 0; i < n; i++){for (int j = 0; j < n-1; j++){if (a[j].heat<a[j+1].heat){struct book x = a[j+1];a[j + 1] = a[j];a[j] = x;//冒泡排序}}}for (int i = 0; i < 5; i++){printf("NO.%d\t%s\t%d\n\n", i+1, a[i].book_name, a[i].heat);}}void sure(){int x;printf("点击1和回车键返回菜单\n");scanf("%d", &x);if (x==1){system("cls");}}void menu(){printf("-=======================================================================================================-\n");printf("| **********1.图书库*****************|\n");printf("| **********2.查询图书***************|\n");printf("| **********3.借取图书***************|\n");printf("| **********4.归还图书***************|\n");printf("| **********5.图书热度排行榜*********|\n");printf("| **********6.退出系统***************|\n");printf("-=======================================================================================================-\n");}int main(){printf("==================================欢迎光临图书管理系统==================================\n\n");int total;//文件中书籍数量printf("请输入图书总量:\n");scanf("%d", &total);printf("\n请输入图书库图书数据:(如三体 01)\n");FILE* fp;if ((fp = fopen("book.txt", "w+")) == NULL){printf("\nCan't open this file!\n");exit(0);}struct book a[50], b[50];for (int i = 0; i < total; i++){scanf("%s%s", a[i].book_name, a[i].book_num);}fwrite(a, sizeof(struct book), total, fp);rewind(fp);fread(b, sizeof(struct book), total, fp);printf("\n输入的图书数据为:(图书名称 图书编号 上次借出日期 状态 热度)\n");for (int i = 0; i < total; i++){printf("%s\t%s\t%s\t%d\t%d\n", b[i].book_name, b[i].book_num, b[i].date, b[i].flag, b[i].heat);}fclose(fp); //建立文件，输入书籍数据printf("\n5秒后进入菜单界面...");Sleep(5000);system("cls");loop: int choose;menu();printf("你想进行的操作是:\n");scanf("%d", &choose);int add; //添加的图书量struct book c[50], d[50];char find[20]; //要查找的数据struct book data[55];if ((fp = fopen("book.txt", "a+")) == NULL){printf("\nCan't open this file!\n");exit(0);}fread(data, sizeof(struct book), total, fp);fclose(fp); //将文件中的数据存入dataswitch (choose){case 1:system("cls");printf("/***图书库***/\n\n");printf("请输入要添加的图书量：\n");scanf("%d", &add);total = total + add;//新的总量if ((fp = fopen("book.txt", "a+")) == NULL){printf("\nCan't open this file!\n");exit(0);}printf("\n请输入需要添加的图书数据:(如三体 01)\n");for (int i = 0; i < add; i++){scanf("%s%s", c[i].book_name, c[i].book_num);}fseek(fp, 0, SEEK_END);fwrite(c, sizeof(struct book), add, fp);rewind(fp);fread(d, sizeof(struct book), total, fp);printf("\n更新后的图书数据为:(图书名称 图书编号 上次借出日期 状态 热度)\n");for (int i = 0; i < total; i++){printf("%s\t%s\t%s\t%d\t%d\n", d[i].book_name, d[i].book_num, d[i].date, d[i].flag, d[i].heat);}fclose(fp); //向文件中添加书籍数据sure();goto loop;case 2:system("cls");printf("/***查询图书***/\n\n");printf("请输入您要查找的图书名称:\n");scanf("%s", find);search(data,find,total);sure();goto loop;case 3:system("cls");printf("/***借取图书***/\n\n");borrow(data,total);if ((fp = fopen("book.txt", "w+")) == NULL){printf("\nCan't open this file!\n");exit(0);}fwrite(data, sizeof(struct book), total, fp);rewind(fp);fclose(fp); //向文件中添加书籍数据sure();goto loop;case 4:system("cls");printf("/***归还图书***/\n\n");returnbook(data,total);if ((fp = fopen("book.txt", "w+")) == NULL){printf("\nCan't open this file!\n");exit(0);}fwrite(data, sizeof(struct book), total, fp);rewind(fp);fclose(fp); //向文件中添加书籍数据sure();goto loop;case 5:system("cls");printf("/***图书热度排行榜***/\n\n");chart(data,total);sure();goto loop;case 6:system("cls");printf("-=======================================================================================================-\n");printf("| ************************************ |\n");printf("| ************************************ |\n");printf("| **********感谢您的使用！************ |\n");printf("| ************************************ |\n");printf("| ************************************ |\n");printf("-=======================================================================================================-\n");break;default:system("cls");printf("请输入正确的序号！\n\n");sure();goto loop;}return 0;}

以上代码在Visual Studio 下运行