用结构体，函数，指针，文件，写一个模拟发牌的c语言代码

下面是一个简单的模拟发牌的C语言代码，使用了结构体，函数，指针和文件：

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

#define NUM_RANKS 13
#define NUM_SUITS 4
#define NUM_CARDS 52

typedef struct {
    int rank;
    int suit;
} Card;

void shuffle(Card *deck);
void swap(Card *card1, Card *card2);
void print_card(Card *card);
void print_deck(Card *deck, int num_cards);
void deal(Card *deck, Card *hand, int num_cards);

int main(void) {
    Card deck[NUM_CARDS];
    Card hand[5];
    FILE *fp;

    // Initialize the deck
    int i, j, card_count = 0;
    for (i = 0; i < NUM_RANKS; i++) {
        for (j = 0; j < NUM_SUITS; j++) {
            deck[card_count].rank = i;
            deck[card_count].suit = j;
            card_count++;
        }
    }

    // Shuffle the deck
    srand((unsigned) time(NULL));
    shuffle(deck);

    // Print the shuffled deck
    printf("Shuffled deck:\n");
    print_deck(deck, NUM_CARDS);

    // Deal a hand of five cards
    deal(deck, hand, 5);

    // Print the hand
    printf("Hand:\n");
    print_deck(hand, 5);

    // Write the hand to a file
    fp = fopen("hand.txt", "w");
    for (i = 0; i < 5; i++) {
        fprintf(fp, "%d %d\n", hand[i].rank, hand[i].suit);
    }
    fclose(fp);

    return 0;
}

void shuffle(Card *deck) {
    int i;
    for (i = 0; i < NUM_CARDS; i++) {
        int j = rand() % NUM_CARDS;
        swap(&deck[i], &deck[j]);
    }
}

void swap(Card *card1, Card *card2) {
    Card temp = *card1;
    *card1 = *card2;
    *card2 = temp;
}

void print_card(Card *card) {
    char *ranks[] = {"2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K", "A"};
    char *suits[] = {"Clubs", "Diamonds", "Hearts", "Spades"};
    printf("%s of %s\n", ranks[card->rank], suits[card->suit]);
}

void print_deck(Card *deck, int num_cards) {
    int i;
    for (i = 0; i < num_cards; i++) {
        print_card(&deck[i]);
    }
}

void deal(Card *deck, Card *hand, int num_cards) {
    int i;
    for (i = 0; i < num_cards; i++) {
        hand[i] = deck[i];
    }
}

这个程序使用了一个 `Card` 结构体来表示一张扑克牌，其中包括牌的等级和花色。在 `main` 函数中，先初始化一副牌，然后洗牌并打印出来。接着用 `deal` 函数从牌堆中发出5张牌，并打印出手牌。最后将手牌写入文件 `hand.txt` 中。 `shuffle` 函数用于洗牌， `swap` 函数用于交换两张牌的位置， `print_card` 函数用于打印一张牌， `print_deck` 函数用于打印整副牌。