package chapter2;

import java.util.Random;
import java.util.Scanner;

public class CoinToss 
{
	public static void main(String[] args)
	{
		//counters
		double nuHeads = 0;
		double nuTails = 0;
		
		//set up to flip coins
		Scanner in = new Scanner(System.in);
		Random rng = new Random();
		int FLIP = 1;
		int choice = FLIP;
		
		while (choice == FLIP)
		{
			System.out.println("Do you wish to flip a coin?  Enter 1 for yes, -1 to quit");
			choice = in.nextInt();
			
			if (choice == FLIP)
			{
				int result = rng.nextInt(2); //0 or 1
				if (result == 0)
				{
					System.out.println("Tails");
					nuTails++;
				}
				else
				{
					System.out.println("Heads");
					nuHeads++;
				}
			}//end if they chose to flip
		}//end while
		
		//print results at the end
		System.out.println("Number of Heads: " + nuHeads +
				"\nNumber of Tails: " + nuTails + "\nFraction Heads: " + 
				nuHeads / (nuHeads + nuTails));
		
		//sample results:
		//Number of Heads: 23.0
		//Number of Tails: 15.0
		//Fraction Heads: 0.6052631578947368
		
	}//end main

}