c语言图书馆管理系统源代码

以下是一个简单的C语言图书管理系统的源代码，包括添加图书、删除图书、查找图书和显示所有图书等功能。代码中使用了结构体和动态内存分配等C语言基础知识。

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

#define MAX_NAME_LEN 50
#define MAX_AUTHOR_LEN 50
#define MAX_BOOKS 100

struct Book {
    char name[MAX_NAME_LEN];
    char author[MAX_AUTHOR_LEN];
    int id;
};

struct Library {
    struct Book* books[MAX_BOOKS];
    int num_books;
};

void add_book(struct Library* lib, char* name, char* author, int id) {
    if (lib->num_books >= MAX_BOOKS) {
        printf("The library is full!\n");
        return;
    }
    struct Book* book = (struct Book*)malloc(sizeof(struct Book));
    strcpy(book->name, name);
    strcpy(book->author, author);
    book->id = id;
    lib->books[lib->num_books] = book;
    lib->num_books++;
    printf("Book added successfully!\n");
}

void remove_book(struct Library* lib, int id) {
    int i;
    for (i = 0; i < lib->num_books; i++) {
        if (lib->books[i]->id == id) {
            free(lib->books[i]);
            lib->books[i] = NULL;
            printf("Book removed successfully!\n");
            return;
        }
    }
    printf("Book not found!\n");
}

void find_book(struct Library* lib, char* name) {
    int i;
    for (i = 0; i < lib->num_books; i++) {
        if (strcmp(lib->books[i]->name, name) == 0) {
            printf("Book found! Author: %s, ID: %d\n", lib->books[i]->author, lib->books[i]->id);
            return;
        }
    }
    printf("Book not found!\n");
}

void show_all_books(struct Library* lib) {
    int i;
    for (i = 0; i < lib->num_books; i++) {
        printf("Name: %s, Author: %s, ID: %d\n", lib->books[i]->name, lib->books[i]->author, lib->books[i]->id);
    }
}

int main() {
    struct Library lib;
    lib.num_books = 0;
    char name[MAX_NAME_LEN];
    char author[MAX_AUTHOR_LEN];
    int id;
    int choice;
    while (1) {
        printf("1. Add book\n");
        printf("2. Remove book\n");
        printf("3. Find book\n");
        printf("4. Show all books\n");
        printf("5. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                printf("Enter book name: ");
                scanf("%s", name);
                printf("Enter author name: ");
                scanf("%s", author);
                printf("Enter book ID: ");
                scanf("%d", &id);
                add_book(&lib, name, author, id);
                break;
            case 2:
                printf("Enter book ID: ");
                scanf("%d", &id);
                remove_book(&lib, id);
                break;
            case 3:
                printf("Enter book name: ");
                scanf("%s", name);
                find_book(&lib, name);
                break;
            case 4:
                show_all_books(&lib);
                break;
            case 5:
                exit(0);
            default:
                printf("Invalid choice!\n");
        }
    }
    return 0;
}