endl相当于回车/换行

#include<iostream>
using namespace std;
int main()
{
    int a,b,c;
    cin>>a>>b>>c;
    int x=a,y=b,z=c;
    if(a>b)
    {
        int t=a;
        a=b;
        b=t;
    }
    if(a>c)
    {
        int t=a;
        a=c;
        c=t;
    }
    if(b>c)
    {
        int t=b;
        b=c;
        c=t;
    }
    cout<<a<<endl<<b<<endl<<c<<endl<<endl;
    cout<<x<<endl<<y<<endl<<z<<endl;
    return 0;
}