#include<iostream>
using namespace std;

double pi = 3.1415;

void printArea(double radius)
{
	return pi*radius*radius;
}

int main()
{
	double pi,radius;
	cout<<"Enter the radius: ";
	cin>> radius;
	cout<<"Enter the value of pi: ";
	cin>>pi;
	
	cout<<"The area calculated in main: "<<pi*radius*radius<<endl;

	cout<<"The area calculated in printArea: "<<printArea(radius)<<endl;
	
	return 0;
}