#include <iostream>
using namespace std ;

//This function computes the area of a circle
double areaOfCircle ( double radius )
{
  const double PI = 3.14 ;
  double Area ;
  Area = PI * radius * radius ;
  return Area ;
}



/* This is the main function */

int main()
{
  double radius = 2 ;
  cout << "Area is:" << areaOfCircle( radius ) << endl ;

  return ( 0 ) ;
}