#include<iostream.h>
void main(){
int a,b,c,x,y;
cout<<"请输入三个整数:"<<endl;
cin>>a>>b>>c;
if (a>b) x=a;
else x=b;
if (x>c) y=x;
else y=c;
cout<<"最大的数为:"<<y<<endl;
if (a<b) x=a;
else x=b;
if (x<c) y=x;
else y=c;
cout<<"最小的数为:"<<y<<endl;
}

#include "stdafx.h"

using namespace std;
void main()
{int a,b,c,max,min;
cin>>a>>b>>c;
max=a>b?a:b,max>c?max:c;
min=a<b?a:b,min<c?min:c;
cout<<max<<min<<endl;
}

#include<iostream.h>
void main(){
int a,b,c,max,min;
cin>>a>>b>>c;
if(a>b){
max=a;
max=max>c?max:c;
cout<<"max"<<":"<<max<<endl;
}
min=a;
min=min<c?min:c;
cout<<"min"<<":"<<min<<endl;
}

int max = i;
if (j > max)
    max = j;
if (k > max)
    max = k;

or

int max = i > j
        ? i > k ? i : k
        : j > k ? j : k;

min类似就不写了。。。。