C语言之利用函数交换两个数的值

#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;
}