用C语言写一个图书馆信息管理系统

好的，下面是一个简单的图书馆信息管理系统的C语言代码示例：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_BOOKS 100 // 最大书籍数量
#define MAX_TITLE_LEN 50 // 书名最大长度
#define MAX_AUTHOR_LEN 30 // 作者名最大长度

typedef struct {
    char title[MAX_TITLE_LEN];
    char author[MAX_AUTHOR_LEN];
    int year;
} book_t;

book_t books[MAX_BOOKS]; // 图书信息数组
int num_books = 0; // 当前图书数量

void add_book() {
    if (num_books >= MAX_BOOKS) {
        printf("Error: too many books!\n");
        return;
    }
    book_t book;
    printf("Enter book title: ");
    scanf("%s", book.title);
    printf("Enter author name: ");
    scanf("%s", book.author);
    printf("Enter year published: ");
    scanf("%d", &book.year);
    books[num_books] = book;
    num_books++;
    printf("Book added successfully.\n");
}

void search_book() {
    char query[MAX_TITLE_LEN];
    printf("Enter book title to search: ");
    scanf("%s", query);
    int found = 0;
    for (int i = 0; i < num_books; i++) {
        if (strcmp(books[i].title, query) == 0) {
            printf("Book found:\n");
            printf("Title: %s\n", books[i].title);
            printf("Author: %s\n", books[i].author);
            printf("Year: %d\n", books[i].year);
            found = 1;
            break;
        }
    }
    if (!found) {
        printf("Book not found.\n");
    }
}

void print_books() {
    printf("All books in library:\n");
    for (int i = 0; i < num_books; i++) {
        printf("%d. %s by %s (%d)\n", i+1, books[i].title, books[i].author, books[i].year);
    }
}

int main() {
    int choice = 0;
    while (choice != 4) {
        printf("Library Information Management System\n");
        printf("1. Add book\n");
        printf("2. Search book\n");
        printf("3. Print all books\n");
        printf("4. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                add_book();
                break;
            case 2:
                search_book();
                break;
            case 3:
                print_books();
                break;
            case 4:
                printf("Exiting...\n");
                break;
            default:
                printf("Invalid choice, please try again.\n");
                break;
        }
    }
    return 0;
}

这个示例实现了一个简单的图书馆信息管理系统，其中包括添加书籍、搜索书籍和打印所有书籍等功能。你可以根据自己的需求对其进行修改和扩展。