#include <iostream.h>

void swap(float&, float&);   // function receives 2 references

int main()
{
  float firstnum = 20.5, secnum = 6.25;

  cout << "The value stored in firstnum is: " << firstnum << endl;
  cout << "The value stored in secnum is: "<< secnum << "\n\n";

  swap(firstnum, secnum);   // call the function with references

  cout << "The value stored in firstnum is now: " 
       << firstnum << endl; 
  cout << "The value stored in secnum is now: " 
       << secnum << endl;

  return 0;
}

void swap(float& num1, float& num2)
{
  float temp;

  temp = num1;     // save num1's value
  num1 = num2;     // store num2's value in num1
  num2 = temp;     // change num2's value

  return;
}