c - 我该如何让这个指针工作？

Question

我有两个功能。一种称为 play_card，一种称为 scan_card。

如您所见，在 scan_card 函数中，它扫描了 3 个数字。但是，我需要将这三个数字返回给 play_card。我怎样才能用指针做到这一点？

void play_card(void) {

    int card_one;
    int card_two;
    int card_three;

    int card_array[] = {0};

    // Calls the scan_card function
    play_scanner(card_array);
    }

// Scans in the cards a user puts in
void scan_card(int card_array[]) {

    int num1;
    int num2;
    int num3;

    scanf("%d %d %d", &num1, &num2, &num3);

    *card_one = num1;
    *card_two = num2;
    *card_three = num3;
}

Answer 1

这是我想到的最简单的实现。

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

void play_card(void);
void scan_card(int* card_array[]);


int main()
{
    play_card();
    return 0;
}

void play_card(void)
{
    int* card_array[3];

    // Calls the scan_card function
    scan_card(card_array);
    int card_one = *card_array[0];
    int card_two = *card_array[1];
    int card_three = *card_array[2];
    printf("\n%d\n%d\n%d\n" , card_one , card_two , card_three);
}

// Scans in the cards a user puts in
void scan_card(int* card_array[])
{

    int num1;
    int num2;
    int num3;

    scanf("%d %d %d", &num1, &num2, &num3);

    card_array[0] = &num1;
    card_array[1] = &num2;
    card_array[2] = &num3;
}