体会函数参数传递

#include<iostream>
using namespace std;
void jiaohuan(int*x,int*y);
int main(void){
int a,b;
cout<<"请输入两个数：\n";
cout<<"a=";
cin>>a;
cout<<"b=";
cin>> b;
cout<<"交换后为：\n";
if(a<b)
jiaohuan(&a,&b);
cout<<"a="<<a<<"\tb="<<b<<'\n';
return 0;
}
void jiaohuan(int*x,int*y){
int t;
t=*x;
*x=*y;
*y=t;
}