图书管理系统借阅图书c语言

根据提供的引用内容，以下是一个简单的C语言图书借阅系统的示例：

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

#define MAX_BOOKS 100

typedef struct {
    char code[10];
    char title[100];
    int quantity;
    int status; // 0表示可借阅，1表示不可借阅
} Book;

Book library[MAX_BOOKS];
int numBooks = 0;

void addBook(char code[], char title[], int quantity) {
    if (numBooks < MAX_BOOKS) {
        strcpy(library[numBooks].code, code);
        strcpy(library[numBooks].title, title);
        library[numBooks].quantity = quantity;
        library[numBooks].status = 0;
        numBooks++;
        printf("图书添加成功！\n");
    } else {
        printf("图书库已满，无法添加新图书！\n");
    }
}

void borrowBook(char code[]) {
    int i;
    for (i = 0; i < numBooks; i++) {
        if (strcmp(library[i].code, code) == 0) {
            if (library[i].quantity > 0) {
                library[i].quantity--;
                if (library[i].quantity == 0) {
                    library[i].status = 1;
                }
                printf("借阅成功！\n");
                return;
            } else {
                printf("该图书已被借完！\n");
                return;
            }
        }
    }
    printf("未找到该图书！\n");
}

void displayBooks() {
    int i;
    printf("图书编码\t图书名称\t库存数量\t借阅状态\n");
    for (i = 0; i < numBooks; i++) {
        printf("%s\t\t%s\t\t%d\t\t%s\n", library[i].code, library[i].title, library[i].quantity, library[i].status == 0 ? "可借阅" : "不可借阅");
    }
}

int main() {
    int choice;
    char code[10];
    char title[100];
    int quantity;

    while (1) {
        printf("\n图书管理系统\n");
        printf("1. 添加图书\n");
        printf("2. 借阅图书\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:
                printf("请输入图书编码：");
                scanf("%s", code);
                printf("请输入图书名称：");
                scanf("%s", title);
                printf("请输入库存数量：");
                scanf("%d", &quantity);
                addBook(code, title, quantity);
                break;
            case 2:
                printf("请输入要借阅的图书编码：");
                scanf("%s", code);
                borrowBook(code);
                break;
            case 3:
                displayBooks();
                break;
            case 4:
                exit(0);
            default:
                printf("无效的选择！\n");
        }
    }

    return 0;
}