//Pass by refernece
#include<iostream>
using namespace std;
void exchange(double&,double&);
int main()
{ double num1, num2;
  cout<<"Enter the first number:";
  cin>>num1;
  cout<<"Enter the second number:";
  cin>>num2;
  if(num1>num2) exchange(num1,num2);
  cout<<"The numbers are "<<num1<<" and "<<num2<<endl;
  system("pause");
  return 0;
} //main
void exchange(double &a,double &b) {
  double temp=a;
  a=b;
  b=temp;
}