import java.util.Random;

/**
 *class MonteCarlo is used to use probability to solve certain types of problems.
 *Central Limit Theorem?
 * 
 * @author John Sloan
 * @version 03/12/08
 */
    public class MonteCarlo
{
    private Random generator;

    /**
     * Constructor for objects of class MonteCarlo.
     * assigns generator a new space in memory for the Ranom package.
     */
    public MonteCarlo()
    {
        generator = new Random ( );
    }

    /**
     * An example of a method - replace this comment with your own
     */
    
     public void surprise()
    {
        //number o0f iterations
        int max = 2000000;
        //increment value
        int hits = 0;
        double maxD = 0;
        //assigned from below double hits
        double hitsD = 0;
        //assigned from local variable below in while body.
        double x = 0;
        //assigned from local variable below in while body.`
        double y = 0;
        //stored value for mathmatical equation below.`
        double answer = 0;
        //stores the value for the answer.
        int i = 0;
        //use the name of my object...is that rand??
        
        while( i < max )
        {
                x = generator.nextDouble( );
                y = generator.nextDouble( );
                if(((x*x) + (y*y)) <= 1)
                    hits++ ;
                i++;
        }
        maxD = (double) max;
        hitsD = (double) hits;
        answer = (4.0 * hitsD / maxD);
        System.out.println(answer);
    }
}