给定两个整形变量的值，将两个值的内容进行交换

//通过中间变量进行交换
#include<stdio.h>
int main()
{
   
	int a = 10;
	int b = 20;
	int temp;     //中间变量
	printf("交换前：a = %d,b = %d\n",a,b);
	
	temp = a;	  //数值交换操作
	a = b;
	b = temp;

	printf