图书管理系统链表c语言

以下是一个用C语言链表实现的图书管理系统的示例：

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

// 定义图书结构体
typedef struct Book {
    char title[100];
    char author[100];
    int year;
    struct Book* next;
} Book;

// 全局变量，指向链表的头节点
Book* head = NULL;

// 函数声明
void addBook();
void displayBooks();
void deleteBook(char* title);
void searchBook(char* title);

// 添加图书
void addBook() {
    Book* newBook = (Book*)malloc(sizeof(Book));
    printf("请输入书名：");
    scanf("%s", newBook->title);
    printf("请输入作者：");
    scanf("%s", newBook->author);
    printf("请输入出版年份：");
    scanf("%d", &(newBook->year));
    newBook->next = NULL;

    if (head == NULL) {
        head = newBook;
    } else {
        Book* current = head;
        while (current->next != NULL) {
            current = current->next;
        }
        current->next = newBook;
    }

    printf("图书添加成功！\n");
}

// 显示所有图书
void displayBooks() {
    if (head == NULL) {
        printf("图书馆为空！\n");
        return;
    }

    Book* current = head;
    printf("图书列表：\n");
    while (current != NULL) {
        printf("书名：%s，作者：%s，出版年份：%d\n", current->title, current->author, current->year);
        current = current->next;
    }
}

// 删除图书
void deleteBook(char* title) {
    if (head == NULL) {
        printf("图书馆为空！\n");
        return;
    }

    Book* current = head;
    Book* previous = NULL;

    while (current != NULL) {
        if (strcmp(current->title, title) == 0) {
            if (previous == NULL) {
                head = current->next;
            } else {
                previous->next = current->next;
            }
            free(current);
            printf("图书删除成功！\n");
            return;
        }
        previous = current;
        current = current->next;
    }

    printf("未找到该图书！\n");
}

// 查找图书
void searchBook(char* title) {
    if (head == NULL) {
        printf("图书馆为空！\n");
        return;
    }

    Book* current = head;
    while (current != NULL) {
        if (strcmp(current->title, title) == 0) {
            printf("书名：%s，作者：%s，出版年份：%d\n", current->title, current->author, current->year);
            return;
        }
        current = current->next;
    }

    printf("未找到该图书！\n");
}

int main() {
    int choice;
    char title[100];

    while (1) {
        printf("\n图书管理系统\n");
        printf("1. 添加图书\n");
        printf("2. 显示所有图书\n");
        printf("3. 删除图书\n");
        printf("4. 查找图书\n");
        printf("5. 退出\n");
        printf("请输入您的选择：");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                addBook();
                break;
            case 2:
                displayBooks();
                break;
            case 3:
                printf("请输入要删除的图书的书名：");
                scanf("%s", title);
                deleteBook(title);
                break;
            case 4:
                printf("请输入要查找的图书的书名：");
                scanf("%s", title);
                searchBook(title);
                break;
            case 5:
                printf("感谢使用图书管理系统！\n");
                exit(0);
            default:
                printf("无效的选择！\n");
        }
    }

    return 0;
}