1、定义书籍
需要定义一个结构体来表示一本书，包含书名、作者、ISBN、出版日期等信息。可以根据需要增加或减少字段。
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_BOOKS 100
#define MAX_TITLE_LEN 100
#define MAX_AUTHOR_LEN 100
typedef struct {
int id;
char title[MAX_TITLE_LEN];
char author[MAX_AUTHOR_LEN];
} Book;
Book library[MAX_BOOKS];
int book_count = 0;
int main() {
printf("Hello, World!");
return 0;
}
2、添加新书籍
需要实现一个函数，用于向系统中添加新的书籍。这个函数需要接收用户输入的书籍信息，并将其存储在合适的位置。
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_BOOKS 100
#define MAX_TITLE_LEN 100
#define MAX_AUTHOR_LEN 100
typedef struct {
int id;
char title[MAX_TITLE_LEN];
char author[MAX_AUTHOR_LEN];
} Book;
Book library[MAX_BOOKS];
int book_count = 0;
void add_book() {
if (book_count >= MAX_BOOKS) {
printf("图书馆已满，无法添加更多书籍。\n");
return;
}
Book new_book;
new_book.id = book_count + 1;
printf("请输入书名: ");
getchar(); // 清除缓冲区的换行符
fgets(new_book.title, MAX_TITLE_LEN, stdin);
new_book.title[strcspn(new_book.title, "\n")] = '\0'; // 移除换行符
printf("请输入作者: ");
fgets(new_book.author, MAX_AUTHOR_LEN, stdin);
new_book.author[strcspn(new_book.author, "\n")] = '\0'; // 移除换行符
library[book_count] = new_book;
book_count++;
printf("书籍添加成功！\n");
}
int main() {
printf("Hello, World!");
return 0;
}
3、删除书籍
通过遍历书籍库找到指定ID的书籍，然后将其后面的书籍向前移动以填补空缺，最后减少书籍总数。
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_BOOKS 100
#define MAX_TITLE_LEN 100
#define MAX_AUTHOR_LEN 100
typedef struct {
int id;
char title[MAX_TITLE_LEN];
char author[MAX_AUTHOR_LEN];
} Book;
Book library[MAX_BOOKS];
int book_count = 0;
void delete_book() {
int id;
printf("请输入要删除的书籍ID: ");
scanf("%d", &id);
int found = 0;
for (int i = 0; i < book_count; i++) {
if (library[i].id == id) {
found = 1;
for (int j = i; j < book_count - 1; j++) {
library[j] = library[j + 1];
}
book_count--;
printf("书籍删除成功！\n");
break;
}
}
if (!found) {
printf("未找到该ID的书籍。\n");
}
}
int main() {
printf("Hello, World!");
return 0;
}4、查找书籍
定义了一个search_book函数，该函数接收一个Book数组（代表图书馆）、书籍数量和要查找的书籍ID作为参数。函数通过遍历图书馆数组，查找与给定ID匹配的书籍，并输出相关信息。
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_BOOKS 100
#define MAX_TITLE_LEN 100
#define MAX_AUTHOR_LEN 100
typedef struct {
int id;
char title[MAX_TITLE_LEN];
char author[MAX_AUTHOR_LEN];
} Book;
Book library[MAX_BOOKS];
int book_count = 0;
void search_book() {
char title[MAX_TITLE_LEN];
printf("请输入要查找的书名: ");
getchar(); // 清除缓冲区的换行符
fgets(title, MAX_TITLE_LEN, stdin);
title[strcspn(title, "\n")] = '\0'; // 移除换行符
int found = 0;
for (int i = 0; i < book_count; i++) {
if (strcmp(library[i].title, title) == 0) {
printf("找到书籍: ID=%d, 书名=%s, 作者=%s\n", library[i].id, library[i].title, library[i].author);
found = 1;
}
}
if (!found) {
printf("未找到该书籍。\n");
}
}
int main() {
printf("Hello, World!");
return 0;
}
5、显示所有书籍
book_count表示图书馆中书籍的数量。display_books函数通过一个for循环遍历图书馆中的每一本书，并打印其ID、书名和作者。
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_BOOKS 100
#define MAX_TITLE_LEN 100
#define MAX_AUTHOR_LEN 100
typedef struct {
int id;
char title[MAX_TITLE_LEN];
char author[MAX_AUTHOR_LEN];
} Book;
Book library[MAX_BOOKS];
int book_count = 0;
void display_books() {
if (book_count == 0) {
printf("图书馆中没有书籍。\n");
return;
}
printf("图书馆中的书籍:\n");
for (int i = 0; i < book_count; i++) {
printf("ID=%d, 书名=%s, 作者=%s\n", library[i].id, library[i].title, library[i].author);
}
}
int main() {
printf("Hello, World!");
return 0;
}
6、完整代码
一个简易的图书管理系统，可以根据自己的需求进行扩展和完善。
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_BOOKS 100
#define MAX_TITLE_LEN 100
#define MAX_AUTHOR_LEN 100
typedef struct {
int id;
char title[MAX_TITLE_LEN];
char author[MAX_AUTHOR_LEN];
} Book;
Book library[MAX_BOOKS];
int book_count = 0;
void add_book() {
if (book_count >= MAX_BOOKS) {
printf("图书馆已满，无法添加更多书籍。\n");
return;
}
Book new_book;
new_book.id = book_count + 1;
printf("请输入书名: ");
getchar(); // 清除缓冲区的换行符
fgets(new_book.title, MAX_TITLE_LEN, stdin);
new_book.title[strcspn(new_book.title, "\n")] = '\0'; // 移除换行符
printf("请输入作者: ");
fgets(new_book.author, MAX_AUTHOR_LEN, stdin);
new_book.author[strcspn(new_book.author, "\n")] = '\0'; // 移除换行符
library[book_count] = new_book;
book_count++;
printf("书籍添加成功！\n");
}
void delete_book() {
int id;
printf("请输入要删除的书籍ID: ");
scanf("%d", &id);
int found = 0;
for (int i = 0; i < book_count; i++) {
if (library[i].id == id) {
found = 1;
for (int j = i; j < book_count - 1; j++) {
library[j] = library[j + 1];
}
book_count--;
printf("书籍删除成功！\n");
break;
}
}
if (!found) {
printf("未找到该ID的书籍。\n");
}
}
void search_book() {
char title[MAX_TITLE_LEN];
printf("请输入要查找的书名: ");
getchar(); // 清除缓冲区的换行符
fgets(title, MAX_TITLE_LEN, stdin);
title[strcspn(title, "\n")] = '\0'; // 移除换行符
int found = 0;
for (int i = 0; i < book_count; i++) {
if (strcmp(library[i].title, title) == 0) {
printf("找到书籍: ID=%d, 书名=%s, 作者=%s\n", library[i].id, library[i].title, library[i].author);
found = 1;
}
}
if (!found) {
printf("未找到该书籍。\n");
}
}
void display_books() {
if (book_count == 0) {
printf("图书馆中没有书籍。\n");
return;
}
printf("图书馆中的书籍:\n");
for (int i = 0; i < book_count; i++) {
printf("ID=%d, 书名=%s, 作者=%s\n", library[i].id, library[i].title, library[i].author);
}
}
int main() {
int choice;
do {
printf("\n图书管理系统\n");
printf("1. 添加书籍\n");
printf("2. 删除书籍\n");
printf("3. 查找书籍\n");
printf("4. 显示所有书籍\n");
printf("5. 退出\n");
printf("请选择操作（1-5）: ");
scanf("%d", &choice);
switch (choice) {
case 1:
add_book();
break;
case 2:
delete_book();
break;
case 3:
search_book();
break;
case 4:
display_books();
break;
case 5:
printf("退出系统。\n");
break;
default:
printf("无效的选择，请重新选择。\n");
}
} while (choice != 5);
return 0;
}