指针变量

#include<iostream>
using namespace std;
void compare(int a,int b){
    int rand;
    if(a<b){
        rand=a;
        a=b;
        b=rand;
    }
    cout<<a<<' '<<b;
}
int main(){
    int x,y;
    cin>>x>>y;
    compare(x,y);
}

　　

#include<iostream>
using namespace std;
int main(){
    int x,y,*a,*b,*p;
    cin>>x>>y;
    a=&x;
    b=&y;
    if(x<y){
        p=a;
        a=b;
        b=p;
    }
    cout<<"max="<<*a<<"min="<<*b;
    
}