Question

是否可以从函数返回多个值并将它们分配给多个变量？

假设我有代码生成3个数字

int first, second , third
int generator (a,b,c){
int one , two ,three
//code that generates numbers and assign them into one, two three
}

我希望将int的值分配给变量first，two to second和three to third。使用C可以这样吗？

Answer 1

您可以将要分配值的变量的地址传递给：

int generator(int* first, int* second, int* third) {
    int one, two, three;

    /* Initialize local variables here. */

    *first = one;
    *second = two;
    *third = three;

    return something;
}

int main(void) {
    int first, second, third;
    generator(&first, &second, &third);
}

另一种方法是创建struct并返回struct：

struct data {
    int one, two, three;
};

并将其退回：

struct data generator() {
    int one, two, three;

     /* Initialize local variables here. */

    return (struct data) { one, two, three };
}

或通过函数参数¹填写，类似于第一种方法：

void generator(struct data* d) {
    int one, two, three;

    /* Fill one, two, and three here. */

    d->one = one;
    d->two = two;
    d->three = three;
}

@CraigEstey在对此答案的评论中提出

_¹

将多个值返回到多个变量

1 个答案: