c语言程序设计图书管理系统

以下是一个简单的基于C语言的图书管理系统：

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

#define MAX_BOOKS 100

struct book {
    char title[100];
    char author[100];
    int year;
};

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

void print_menu() {
    printf("Welcome to the Book Management System!\n");
    printf("1. Add a book\n");
    printf("2. Search for a book\n");
    printf("3. Print all books\n");
    printf("4. Exit\n");
}

void add_book() {
    if (num_books >= MAX_BOOKS) {
        printf("Sorry, the maximum number of books has been reached.\n");
        return;
    }

    struct book new_book;

    printf("Enter the title of the book: ");
    fgets(new_book.title, 100, stdin);
    new_book.title[strlen(new_book.title) - 1] = '\0';

    printf("Enter the author of the book: ");
    fgets(new_book.author, 100, stdin);
    new_book.author[strlen(new_book.author) - 1] = '\0';

    printf("Enter the year the book was published: ");
    scanf("%d", &new_book.year);
    getchar();

    books[num_books] = new_book;
    num_books++;

    printf("The book has been added to the system.\n");
}

void search_book() {
    char search_title[100];
    printf("Enter the title of the book to search for: ");
    fgets(search_title, 100, stdin);
    search_title[strlen(search_title) - 1] = '\0';

    int found = 0;
    for (int i = 0; i < num_books; i++) {
        if (strcmp(books[i].title, search_title) == 0) {
            printf("Book found:\n");
            printf("Title: %s\n", books[i].title);
            printf("Author: %s\n", books[i].author);
            printf("Year: %d\n", books[i].year);
            found = 1;
            break;
        }
    }

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

void print_all_books() {
    printf("All books in the system:\n");
    for (int i = 0; i < num_books; i++) {
        printf("Book %d:\n", i+1);
        printf("Title: %s\n", books[i].title);
        printf("Author: %s\n", books[i].author);
        printf("Year: %d\n", books[i].year);
    }
}

int main() {
    int choice;

    do {
        print_menu();

        printf("Enter your choice: ");
        scanf("%d", &choice);
        getchar();

        switch (choice) {
            case 1:
                add_book();
                break;
            case 2:
                search_book();
                break;
            case 3:
                print_all_books();
                break;
            case 4:
                printf("Goodbye!\n");
                break;
            default:
                printf("Invalid choice, please try again.\n");
                break;
        }
    } while (choice != 4);

    return 0;
}

该程序使用结构体来存储书籍的信息，可以添加、搜索和打印所有书籍。用户可以通过菜单选择要执行的操作。程序限制了最大书籍数量为100本。