#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
void Swap(int *px,int *py)
{
    int tmp = *px;
    *px = *py;
    *py = tmp;


}
int main()
{
    int a = 1;
    int b = 2;
    Swap(&a,&b);
    printf("a = %d b = %d\n",a, b);
    return 0;
}