C程序习题-使用宏交换两个参数值[9.1]

#include <stdio.h>
#define EXCHANGE(a,b) temp = a; a = b; b = temp;

int main(int argc, char *argv[])
{
    int temp;
    int x,y ;
    printf("please input x,y value:");
    scanf("%d,%d",&x,&y);
    EXCHANGE(x,y);
    printf("result x = %d,y = %d",x,y);
    system("pause");
    return 0;
}