//Read 3 numbers, sort with function, then print
#include <iostream>
using namespace std;
void swap(int& first, int& second) //passed by reference
{ int temp;
  temp = first;    //temp is a local variable
  first = second;  //first and second are references
  second = temp;   // to the variables that were passed
} //swap
	
main() //execution always starts in main
{ int num1, num2, num3;
  cout<<"Enter the first number:";
  cin>>num1;
  cout<<"Enter the second number:";
  cin>>num2;
  cout<<"Enter the third number:";
  cin>>num3;
  if (num1>num2) //swap the two numbers
    swap(num1, num2); //pass num1 and num2 by reference
  if (num2>num3) //swap the two numbers
    swap(num2, num3); //pass num2 and num3 by reference
  if (num1>num2) //swap the two numbers
    swap(num1, num2); //pass num1 and num2 by reference
  cout<<"In order: "<<num1<<" "<<num2<<" "<<num3<<"\n";
  return 0;
} //main