C语言数据结构图书管理系统

C语言数据结构图书管理系统是一个基于结构体的动态链表的程序，分为管理员操作和会员操作两个界面。管理员操作界面可以进行图书的收录和删除等操作，会员操作界面可以进行注册、借书和还书等操作。

以下是一个简单的C语言数据结构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，指向图书链表的头节点
Book* head = NULL;

// 函数声明
void addBook();void deleteBook();
void displayBooks();
void freeMemory();

int main() {
    int choice;

    while (1) {
        printf("图书管理系统\n");
        printf("1. 添加图书\n");        printf("2. 删除图书\n");
        printf("3. 显示图书\n");
        printf("4. 退出\n");
        printf("请选择操作：");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                addBook();
                break;
            case 2:
                deleteBook();
                break;
            case 3:
                displayBooks();
                break;
            case 4:
                freeMemory();
                exit(0);
            default:
                printf("无效的选择！\n");
        }
    }

    return 0;
}

// 添加图书
void addBook() {
    Book* newBook = (Book*)malloc(sizeof(Book));

    printf("请输入图书标题：");
    scanf("%s", newBook->title);
    printf("请输入图书作者：");
    scanf("%s", newBook->author);
    printf("请输入图书出版年份：");
    scanf("%d", &(newBook->year));

    newBook->next = head;
    head = newBook;

    printf("图书添加成功！\n");
}

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

    char title[100];
    printf("请输入要删除的图书标题：");
    scanf("%s", title);

    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("未找到要删除的图书！\n");
}

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

    Book* current = head;

    while (current != NULL) {
        printf("标题：%s\n", current->title);
        printf("作者：%s\n", current->author);
        printf("出版年份：%d\n", current->year);
        printf("--\n");

        current = current->next;
    }
}

// 释放内存
void freeMemory() {
    Book* current = head;
    Book* next;

    while (current != NULL) {
        next = current->next;
        free(current);
        current = next;
    }
}