MonteHall.java in a pgm

MonteHall.java

public class MonteHall

{

 public static void main(String[] args)

{

      int N = Integer.parseInt(args[0]); 

      int wins = 0;                     

       for (int i = 0; i < N; i++)

      {

                    int prize  = (int) (3 * Math.random());

                    int choice = (int) (3 * Math.random());

                    int reveal;

         do

        {

            reveal = (int) (3 * Math.random());

         } while ((reveal == choice) || (reveal == prize));

         int other = 0 + 1 + 2 - reveal - choice;

                     if (other == prize) wins++;

      }

      System.out.println("Fraction of games won = " + 1.0 * wins / N);

   }

}