// Written by Hosung Leo Kim

#include <iostream>

int sum( int n1, int n2 )
{
  return ( n1 + n2 );
}

double sum( double n1, double n2 )
{
  return ( n1 + n2 );
}

int sum( int n1, int n2, int n3 )
{
  return ( n1 + n2 + n3 );
}

int main()
{
  cout << "The sum of 1 and 2 is "
       << sum( 1, 2 ) << endl;

  cout << "The sum of 1.5 and 2.5 is "
       << sum( 1.5, 2.0 ) << endl;

  cout << "The sum of 1, 2, and 3 is "
       << sum( 1, 2, 3 ) << endl;
  return 0;
}