//Sort 2 numbers
#include <iostream>
using namespace std;
void swap(int& n1, int& n2)
//receive  n1 and n2 by reference, exchange
{ int temp;
  temp=n1;
  n1=n2;
  n2=temp;
} //swap

void main() //input 2 numbers, sort, print
{ int first, second;
  cout<<"enter a number ";
  cin>>first;
  cout<<"enter a number ";
  cin>>second;
  if (first>second) swap(first, second);
  cout<<"In order: "<<first<<" "<<second<<"\n";
} //main