// Something more or less useful. This proggy takes raidius of a circle as user input and outputs the 
// diameter, circumference and area.
// Ill'z own production 

#include <iostream>
using std::cin;
using std::cout;
using std::endl;

int main()
{
	int r;
	float pi;
	pi = 3.14159;
	
	cout << "Please enter the radius of your circle ";
	cin >> r; 
	cout << "The diameter is " << 2 * r << endl;
	cout << "The circumference is " << 2 * pi *r << endl;
	cout << "The area is " << pi * r *r << endl;
	
	return 0;
}