#include <cmath>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
    int In1;
    const double pi = 3.14159; // Declares Variables
    float Area;
    
    cout << "Enter the radius of a circle: "; 
    cin >> In1;

    Area = pi * pow(In1, 2.0); // Calculates Area
    
    cout << "The area to your circle is " << Area << endl;
    
    system("PAUSE");
    return 0;
}