Final Sem 1

Code

///Name: Ben Borglin
///Period: 6
///Program: Final Exam Sem 1
///File Name: Final1.java
///Date Finished: 1/22/16

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

public class Final1
{
    public static void main( String[] args)
    {
        Scanner keyboard = new Scanner(System.in);
        Random r = new Random();
        int heads, tails, flips; //Used these variables to make this clear and simple
        tails = 0;
        heads = 0;
        
        System.out.print("How many coin flips would you like to do: ");
        flips = keyboard.nextInt();
        while ( flips < 0 || flips > 2100000000 ) //I used a while loop because It was easier to type and it is more clear
        {
            if ( flips < 0 )
            {
                System.out.println("Too small of a number pick again.");
                flips = keyboard.nextInt();
            }
            else
            {
                System.out.println("Too big of a number pick again.");
                flips = keyboard.nextInt();
            }
        }
            for (int n = 0; n < flips; n++) //I used a for loop to lessen the type load and all the variables are clearly labeled on top
            {
                int x = r.nextInt(2);
			    
                if ( x == 1 )
                    heads++;
                else
                    tails++;
            }
 
        
       
        
        double probOfHeads = ((double)heads / flips)*100;
        double probOfTails = ((double)tails / flips)*100;

        System.out.println(" ");
        System.out.println("Total number of heads: " + heads + "");
        System.out.println("Probability of heads : " + probOfHeads + "%");
        System.out.println(" ");
        System.out.println("Total number of tails: " + tails + ".");
        System.out.println("Probability of tails : " + probOfTails + "%");
    }
}
        
///I notice that to get an exact 50/50 chance you must use 2.1 billion input number of coin flips
    

Picture of the output