package apcsjava;

public class DoorProblem {

	//it pained me to write this...make it shorter/simpler/better
	public static void main(String[] args) {
		int doorCount = 4;
		int never = 0;
        int always = 0;
		int[] doors = new int[doorCount];
		System.out.println("Using " + doorCount + " doors.");
		int runs = 100000;
        int selectedDoor;
        int prizeDoor;
        int j;
	    for (int k = 0; k < runs; k++) {
            for (int i = 0; i < doors.length; i++) {
				doors[i] = 0;

package com.apcs;
public class Main {
    public static void main(String[] args) {
        int doorCount = 4, never = 0, runs = 1000000;
        for (int k = 0; k < runs; k++) if ((int)(Math.random()*doorCount) == (int)(Math.random()*doorCount)) never++;
        System.out.println("Using " + doorCount + " doors.\n" + "After " + runs + " runs, not switching succeeds " + (never*100.0/runs) + "% of the time.\n" + "After " + runs + " runs, switching succeeds " + (100 - (never*100/runs)) + "% of the time.");