用C语言写一个图书管理系统，功能包括录入，查询删除，修改，浏览等

好的，我可以为您提供一个基本的图书管理系统的 C 语言代码示例，包括录入、查询、删除、修改和浏览功能。以下是代码示例：

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

#define MAX_BOOKS 100

struct book {
    char title[50];
    char author[50];
    int id;
};

struct book books[MAX_BOOKS];
int num_books = 0;

void add_book()
{
    if (num_books >= MAX_BOOKS) {
        printf("Error: Maximum number of books reached.\n");
        return;
    }

    printf("Enter book title: ");
    scanf("%s", books[num_books].title);

    printf("Enter book author: ");
    scanf("%s", books[num_books].author);

    printf("Enter book ID: ");
    scanf("%d", &books[num_books].id);

    num_books++;

    printf("Book added successfully.\n");
}

void search_book()
{
    int id;
    printf("Enter book ID: ");
    scanf("%d", &id);

    for (int i = 0; i < num_books; i++) {
        if (books[i].id == id) {
            printf("Book title: %s\n", books[i].title);
            printf("Book author: %s\n", books[i].author);
            printf("Book ID: %d\n", books[i].id);
            return;
        }
    }

    printf("Book not found.\n");
}

void delete_book()
{
    int id;
    printf("Enter book ID: ");
    scanf("%d", &id);

    for (int i = 0; i < num_books; i++) {
        if (books[i].id == id) {
            for (int j = i; j < num_books - 1; j++) {
                books[j] = books[j+1];
            }
            num_books--;
            printf("Book deleted successfully.\n");
            return;
        }
    }

    printf("Book not found.\n");
}

void modify_book()
{
    int id;
    printf("Enter book ID: ");
    scanf("%d", &id);

    for (int i = 0; i < num_books; i++) {
        if (books[i].id == id) {
            printf("Enter new book title: ");
            scanf("%s", books[i].title);

            printf("Enter new book author: ");
            scanf("%s", books[i].author);

            printf("Enter new book ID: ");
            scanf("%d", &books[i].id);

            printf("Book modified successfully.\n");
            return;
        }
    }

    printf("Book not found.\n");
}

void view_books()
{
    printf("Total number of books: %d\n", num_books);
    for (int i = 0; i < num_books; i++) {
        printf("Book title: %s\n", books[i].title);
        printf("Book author: %s\n", books[i].author);
        printf("Book ID: %d\n", books[i].id);
    }
}

int main()
{
    int choice;

    while (1) {
        printf("\n");
        printf("1. Add book\n");
        printf("2. Search book\n");
        printf("3. Delete book\n");
        printf("4. Modify book\n");
        printf("5. View books\n");
        printf("6. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                add_book();
                break;
            case 2:
                search_book();
                break;
            case 3:
                delete_book();
                break;
            case 4:
                modify_book();
                break;
            case 5:
                view_books();
                break;
            case 6:
                exit(0);
                break;
            default:
                printf("Invalid choice.\n");
                break;
        }
    }

    return 0;
}

这是一个简单的命令行程序，可以通过菜单来执行不同的功能。您可以根据自己的需要进行修改和扩展，例如添加借阅和归还功能等。