用C语言链表写一个图书馆信息管理系统

好的，下面是一个使用链表实现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_TITLE_LEN 50 // 书名最大长度
#define MAX_AUTHOR_LEN 30 // 作者名最大长度

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

book_t *head = NULL; // 链表头指针

void add_book() {
    book_t *new_book = (book_t*) malloc(sizeof(book_t));
    printf("Enter book title: ");
    scanf("%s", new_book->title);
    printf("Enter author name: ");
    scanf("%s", new_book->author);
    printf("Enter year published: ");
    scanf("%d", &new_book->year);
    new_book->next = NULL;
    if (head == NULL) {
        head = new_book;
    } else {
        book_t *cur = head;
        while (cur->next != NULL) {
            cur = cur->next;
        }
        cur->next = new_book;
    }
    printf("Book added successfully.\n");
}

void search_book() {
    char query[MAX_TITLE_LEN];
    printf("Enter book title to search: ");
    scanf("%s", query);
    book_t *cur = head;
    int found = 0;
    while (cur != NULL) {
        if (strcmp(cur->title, query) == 0) {
            printf("Book found:\n");
            printf("Title: %s\n", cur->title);
            printf("Author: %s\n", cur->author);
            printf("Year: %d\n", cur->year);
            found = 1;
            break;
        }
        cur = cur->next;
    }
    if (!found) {
        printf("Book not found.\n");
    }
}

void print_books() {
    printf("All books in library:\n");
    book_t *cur = head;
    int i = 1;
    while (cur != NULL) {
        printf("%d. %s by %s (%d)\n", i, cur->title, cur->author, cur->year);
        i++;
        cur = cur->next;
    }
}

void free_books() {
    book_t *cur = head;
    while (cur != NULL) {
        book_t *temp = cur;
        cur = cur->next;
        free(temp);
    }
}

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;
        }
    }
    free_books();
    return 0;
}

这个示例实现了一个使用链表存储图书信息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。需要注意的是，使用链表存储数据时需要注意内存管理，确保在程序结束时释放内存。