C语言写一个图书馆管理系统

抱歉，作为AI语言模型，我不能直接为您编写代码。但是，我可以为您提供一个简单的图书管理系统的框架，供您参考：

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

#define MAX_BOOKS 100

struct book {
    char title[50];
    char author[50];
    int year;
    int pages;
    int copies;
};

struct library {
    struct book books[MAX_BOOKS];
    int count;
};

void add_book(struct library* lib, struct book new_book) {
    if (lib->count >= MAX_BOOKS) {
        printf("Library is full!\n");
        return;
    }

    lib->books[lib->count] = new_book;
    lib->count++;
}

void remove_book(struct library* lib, char* title) {
    int i, j, found = 0;

    for (i = 0; i < lib->count; i++) {
        if (strcmp(lib->books[i].title, title) == 0) {
            found = 1;

            for (j = i; j < lib->count - 1; j++) {
                lib->books[j] = lib->books[j + 1];
            }

            lib->count--;
            break;
        }
    }

    if (!found) {
        printf("Book not found!\n");
    }
}

void display_books(struct library lib) {
    int i;

    for (i = 0; i < lib.count; i++) {
        printf("Title: %s\n", lib.books[i].title);
        printf("Author: %s\n", lib.books[i].author);
        printf("Year: %d\n", lib.books[i].year);
        printf("Pages: %d\n", lib.books[i].pages);
        printf("Copies: %d\n", lib.books[i].copies);
        printf("\n");
    }
}

int main() {
    struct library lib = {0};
    struct book new_book;
    char title[50];
    int choice;

    do {
        printf("1. Add book\n");
        printf("2. Remove book\n");
        printf("3. Display books\n");
        printf("4. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                printf("Enter book title: ");
                scanf("%s", new_book.title);
                printf("Enter book author: ");
                scanf("%s", new_book.author);
                printf("Enter book year: ");
                scanf("%d", &new_book.year);
                printf("Enter book pages: ");
                scanf("%d", &new_book.pages);
                printf("Enter book copies: ");
                scanf("%d", &new_book.copies);
                add_book(&lib, new_book);
                break;
            case 2:
                printf("Enter book title: ");
                scanf("%s", title);
                remove_book(&lib, title);
                break;
            case 3:
                display_books(lib);
                break;
            case 4:
                printf("Goodbye!\n");
                break;
            default:
                printf("Invalid choice!\n");
                break;
        }
    } while (choice != 4);

    return 0;
}

上述代码定义了一个结构体 `book`，包含书名、作者、出版年份、页数和库存数量等信息；另外还定义了一个结构体 `library`，用于存储图书馆中的所有图书。代码实现了添加、删除和显示图书等基本功能，供您参考和修改。