生成一段图书管理系统C语言代码，要求菜单登录，书籍录入，包含书名，作者名，出版社，出版时间，分类名，价格，可以按照作者名和书名查询，具有浏览书籍的功能，还有增加书籍，删除书籍的功能

好的，以下是图书管理系统的C语言代码，注意：本代码仅供学习交流使用，不可用于商业用途。

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

#define MAX_BOOKS 1000

struct Book {
    char title[50];
    char author[20];
    char publisher[20];
    char publish_time[20];
    char category[20];
    float price;
};

int login();
void show_menu();
void add_book(struct Book books[], int *num_books);
void delete_book(struct Book books[], int *num_books);
void search_book(struct Book books[], int num_books);
void browse_books(struct Book books[], int num_books);

int main() {
    struct Book books[MAX_BOOKS];
    int num_books = 0;
    int option;

    if (login()) {
        do {
            show_menu();
            scanf("%d", &option);
            switch (option) {
                case 1:
                    add_book(books, &num_books);
                    break;
                case 2:
                    delete_book(books, &num_books);
                    break;
                case 3:
                    search_book(books, num_books);
                    break;
                case 4:
                    browse_books(books, num_books);
                    break;
                case 5:
                    printf("Goodbye!\n");
                    break;
                default:
                    printf("Invalid option!\n");
            }
        } while (option != 5);
    } else {
        printf("Wrong password. Exiting...\n");
    }

    return 0;
}

int login() {
    char password[20];

    printf("Please enter password: ");
    scanf("%s", password);

    return strcmp(password, "123456") == 0;
}

void show_menu() {
    printf("Welcome to the Book Management System!\n");
    printf("1. Add book\n");
    printf("2. Delete book\n");
    printf("3. Search book\n");
    printf("4. Browse books\n");
    printf("5. Exit\n");
    printf("Please enter your option: ");
}

void add_book(struct Book books[], int *num_books) {
    if (*num_books >= MAX_BOOKS) {
        printf("The library is full. Cannot add more books.\n");
    } else {
        printf("Please enter book title: ");
        scanf("%s", books[*num_books].title);
        printf("Please enter author name: ");
        scanf("%s", books[*num_books].author);
        printf("Please enter publisher name: ");
        scanf("%s", books[*num_books].publisher);
        printf("Please enter publish time: ");
        scanf("%s", books[*num_books].publish_time);
        printf("Please enter category name: ");
        scanf("%s", books[*num_books].category);
        printf("Please enter price: ");
        scanf("%f", &books[*num_books].price);
        (*num_books)++;
        printf("Book added successfully.\n");
    }
}

void delete_book(struct Book books[], int *num_books) {
    char title[50];
    char author[20];
    int i, j;

    printf("Please enter book title: ");
    scanf("%s", title);
    printf("Please enter author name: ");
    scanf("%s", author);

    for (i = 0; i < *num_books; i++) {
        if (strcmp(books[i].title, title) == 0 &&
            strcmp(books[i].author, author) == 0) {
            for (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 search_book(struct Book books[], int num_books) {
    char keyword[50];
    int i;

    printf("Please enter keyword: ");
    scanf("%s", keyword);

    printf("Search result:\n");
    for (i = 0; i < num_books; i++) {
        if (strstr(books[i].title, keyword) != NULL ||
            strstr(books[i].author, keyword) != NULL) {
            printf("Title: %s\n", books[i].title);
            printf("Author: %s\n", books[i].author);
            printf("Publisher: %s\n", books[i].publisher);
            printf("Publish time: %s\n", books[i].publish_time);
            printf("Category: %s\n", books[i].category);
            printf("Price: %.2f\n", books[i].price);
            printf("\n");
        }
    }
}

void browse_books(struct Book books[], int num_books) {
    int i;

    printf("Library books:\n");
    for (i = 0; i < num_books; i++) {
        printf("Title: %s\n", books[i].title);
        printf("Author: %s\n", books[i].author);
        printf("Publisher: %s\n", books[i].publisher);
        printf("Publish time: %s\n", books[i].publish_time);
        printf("Category: %s\n", books[i].category);
        printf("Price: %.2f\n", books[i].price);
        printf("\n");
    }
}