怎么写c语言音像图书租借管理系统

以下是一个简单的C语言音像图书租借管理系统的实现：

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

#define MAX_BOOKS 100
#define MAX_CUSTOMERS 100

typedef struct {
    char title[50];
    char author[50];
    int year;
    int available;
} Book;

typedef struct {
    char name[50];
    char address[50];
    char phone[15];
    Book *rented_books[5];
} Customer;

Book books[MAX_BOOKS];
Customer customers[MAX_CUSTOMERS];
int num_books = 0;
int num_customers = 0;

void add_book();
void list_books();
void add_customer();
void list_customers();
void rent_book();
void return_book();

int main() {
    int choice;
    do {
        printf("1. Add book\n");
        printf("2. List books\n");
        printf("3. Add customer\n");
        printf("4. List customers\n");
        printf("5. Rent book\n");
        printf("6. Return book\n");
        printf("0. Exit\n");
        printf("Enter choice: ");
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                add_book();
                break;
            case 2:
                list_books();
                break;
            case 3:
                add_customer();
                break;
            case 4:
                list_customers();
                break;
            case 5:
                rent_book();
                break;
            case 6:
                return_book();
                break;
            case 0:
                printf("Goodbye!\n");
                break;
            default:
                printf("Invalid choice!\n");
                break;
        }
    } while (choice != 0);
    return 0;
}

void add_book() {
    if (num_books >= MAX_BOOKS) {
        printf("Maximum number of books reached!\n");
        return;
    }
    Book book;
    printf("Enter title: ");
    scanf("%s", book.title);
    printf("Enter author: ");
    scanf("%s", book.author);
    printf("Enter year: ");
    scanf("%d", &book.year);
    book.available = 1;
    books[num_books++] = book;
    printf("Book added successfully!\n");
}

void list_books() {
    printf("Title\tAuthor\tYear\tAvailable\n");
    for (int i = 0; i < num_books; i++) {
        printf("%s\t%s\t%d\t%s\n", books[i].title, books[i].author, books[i].year, books[i].available ? "Yes" : "No");
    }
}

void add_customer() {
    if (num_customers >= MAX_CUSTOMERS) {
        printf("Maximum number of customers reached!\n");
        return;
    }
    Customer customer;
    printf("Enter name: ");
    scanf("%s", customer.name);
    printf("Enter address: ");
    scanf("%s", customer.address);
    printf("Enter phone: ");
    scanf("%s", customer.phone);
    for (int i = 0; i < 5; i++) {
        customer.rented_books[i] = NULL;
    }
    customers[num_customers++] = customer;
    printf("Customer added successfully!\n");
}

void list_customers() {
    printf("Name\tAddress\tPhone\n");
    for (int i = 0; i < num_customers; i++) {
        printf("%s\t%s\t%s\n", customers[i].name, customers[i].address, customers[i].phone);
    }
}

void rent_book() {
    char book_title[50];
    printf("Enter book title: ");
    scanf("%s", book_title);
    Book *book = NULL;
    for (int i = 0; i < num_books; i++) {
        if (strcmp(books[i].title, book_title) == 0) {
            book = &books[i];
            break;
        }
    }
    if (book == NULL) {
        printf("Book not found!\n");
        return;
    }
    if (!book->available) {
        printf("Book is not available for rent!\n");
        return;
    }
    char customer_name[50];
    printf("Enter customer name: ");
    scanf("%s", customer_name);
    Customer *customer = NULL;
    for (int i = 0; i < num_customers; i++) {
        if (strcmp(customers[i].name, customer_name) == 0) {
            customer = &customers[i];
            break;
        }
    }
    if (customer == NULL) {
        printf("Customer not found!\n");
        return;
    }
    for (int i = 0; i < 5; i++) {
        if (customer->rented_books[i] == NULL) {
            customer->rented_books[i] = book;
            book->available = 0;
            printf("Book rented successfully!\n");
            return;
        }
    }
    printf("Customer has reached maximum number of rented books!\n");
}

void return_book() {
    char book_title[50];
    printf("Enter book title: ");
    scanf("%s", book_title);
    Book *book = NULL;
    for (int i = 0; i < num_books; i++) {
        if (strcmp(books[i].title, book_title) == 0) {
            book = &books[i];
            break;
        }
    }
    if (book == NULL) {
        printf("Book not found!\n");
        return;
    }
    if (book->available) {
        printf("Book is already available!\n");
        return;
    }
    char customer_name[50];
    printf("Enter customer name: ");
    scanf("%s", customer_name);
    Customer *customer = NULL;
    for (int i = 0; i < num_customers; i++) {
        if (strcmp(customers[i].name, customer_name) == 0) {
            customer = &customers[i];
            break;
        }
    }
    if (customer == NULL) {
        printf("Customer not found!\n");
        return;
    }
    for (int i = 0; i < 5; i++) {
        if (customer->rented_books[i] == book) {
            customer->rented_books[i] = NULL;
            book->available = 1;
            printf("Book returned successfully!\n");
            return;
        }
    }
    printf("Customer has not rented this book!\n");
}

这个系统提供了以下功能：

- 添加图书
- 列出图书
- 添加客户
- 列出客户
- 租借图书
- 归还图书

每本图书包含标题、作者、年份、可用性等信息。每个客户包含名称、地址、电话和租用的图书列表。租用图书时，用户必须提供其名称和所需的图书标题。如果该书可用，则将其标记为不可用，并将其添加到客户的租用列表中。还书时，用户必须提供其名称和要归还的图书标题。如果该书已被租用，则将其标记为可用，并将其从客户的租用列表中删除。