请用c语言帮我写一个模块化的图书管理系统

好的，我可以帮你写一个模块化的图书管理系统。以下是示例代码：

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

// 定义图书结构体
typedef struct Book {
    char title[50];
    char author[50];
    int pages;
    int year;
} Book;

// 定义图书馆结构体
typedef struct Library {
    Book* books[100];
    int count;
} Library;

// 函数声明
void addBook(Library* library);
void searchBook(Library* library);
void deleteBook(Library* library);
void displayMenu();

int main() {
    Library library;
    library.count = 0;

    int choice;
    do {
        displayMenu();
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                addBook(&library);
                break;
            case 2:
                searchBook(&library);
                break;
            case 3:
                deleteBook(&library);
                break;
            case 4:
                printf("Goodbye!\n");
                break;
            default:
                printf("Invalid choice. Please try again.\n");
                break;
        }
    } while (choice != 4);

    return 0;
}

void addBook(Library* library) {
    if (library->count == 100) {
        printf("Library is already full.\n");
        return;
    }

    Book* newBook = (Book*) malloc(sizeof(Book));
    printf("Enter book title: ");
    scanf("%s", newBook->title);
    printf("Enter book author: ");
    scanf("%s", newBook->author);
    printf("Enter number of pages: ");
    scanf("%d", &newBook->pages);
    printf("Enter year published: ");
    scanf("%d", &newBook->year);

    library->books[library->count] = newBook;
    library->count++;

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

void searchBook(Library* library) {
    char searchTerm[50];
    printf("Enter search term: ");
    scanf("%s", searchTerm);

    for (int i = 0; i < library->count; i++) {
        Book* book = library->books[i];
        if (strstr(book->title, searchTerm) != NULL || strstr(book->author, searchTerm) != NULL) {
            printf("%s by %s (%d pages, %d)\n", book->title, book->author, book->pages, book->year);
        }
    }
}

void deleteBook(Library* library) {
    char deleteTitle[50];
    printf("Enter title of book to delete: ");
    scanf("%s", deleteTitle);

    int deleted = 0;
    for (int i = 0; i < library->count; i++) {
        Book* book = library->books[i];
        if (strcmp(book->title, deleteTitle) == 0) {
            free(book);
            library->books[i] = NULL;
            deleted = 1;
            break;
        }
    }

    if (deleted) {
        for (int i = 0; i < library->count; i++) {
            if (library->books[i] == NULL) {
                if (i != library->count - 1) {
                    library->books[i] = library->books[i + 1];
                }
                library->count--;
            }
        }

        printf("Book deleted successfully!\n");
    } else {
        printf("Book not found.\n");
    }
}

void displayMenu() {
    printf("\n");
    printf("----------\n");
    printf("MENU\n");
    printf("----------\n");
    printf("1. Add book\n");
    printf("2. Search for book\n");
    printf("3. Delete book\n");
    printf("4. Exit\n");
    printf("Enter your choice: ");
}

这个图书管理系统包含了添加图书、搜索图书、删除图书的功能，并且使用了模块化的编程方法，将图书和图书馆分别封装成了结构体。你可以根据需要进行修改和扩展。