int ARR(int *a,int *b)
{
int c = 0;
c = *a;
*a = *b;
*b = c;
return 0;
}
int main()
{
int num1 = 110;
int num2 = 20;
printf("%d\n", num1);
printf("%d\n", num2);
int num3 = ARR(&num1, &num2);
printf("%d\n", num1);
printf("%d\n", num2);
return 0;
}原文：https://blog.51cto.com/14893161/2518162