//Programmer: Owen Nguyen

//Project: Probability Stats

//Date: May 26th

//Description: From a pair of dice, keep track of all possible rolls when rolling the pair of dice 100000 times

using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Dice Pair Probability Stats");

        Console.WriteLine(new String('=',40));

        programRe://restarts here

        Console.WriteLine("How many times would you like to roll the pair of dice?");

        int amt = Convert.ToInt32(Console.ReadLine());

​

        if (amt <= 0)//simple error check to see if roll is less than 0

        {

            Console.WriteLine("Invalid roll amount... Restarting program");

            goto programRe;//restarts here when rolls is less than 0 or equal to 0

        }

​

        Random rG = new Random();//starts a random number generator

​

        int [] rollList = new int [13];//array keeping track of tally of pair of dice

​

        int rolls = 0;//rolls amount declared

        int sum = 0;//declares sum (of dice pair)

        //declares dice values

        int dv1;

        int dv2;

        do

        {

                dv1 = rG.Next(1,7);//rolls dice 1

                dv2 = rG.Next(1,7);//rolls dice 2

                sum = dv1 + dv2;//adds dice together as rolls

            //Add 1 as a tally when each roll value is rolled

                if (sum==2)  //update the number of 2's rolled

                    rollList[2] +=1;//adds one to rollList tally (of amount of twos)

                else if (sum==3)

                    rollList[3] +=1;

                else if (sum == 4)

                    rollList[4] +=1;

                else if (sum == 5)

                    rollList[5] +=1;

                else if (sum == 6)

                    rollList[6] +=1;

                else if (sum == 7)

                    rollList[7] +=1;

                else if (sum == 8)

                    rollList[8] +=1;

                else if (sum == 9)

                    rollList[9] +=1;

                else if (sum == 10)

                    rollList[10] +=1;

                else if (sum == 11)

                    rollList[11] +=1;

                else if (sum == 12)

                    rollList[12] +=1;

​

            rolls++;//adds one to rolls

        } while (rolls <= amt);//loops when rolls (starting at zero) is less than the amt roll inputted by user

​

        //calculate percentage of rolls 

        double pc2 = (double)rollList[2]/amt;

        double pc3 = (double)rollList[3]/amt;

        double pc4 = (double)rollList[4]/amt;

        double pc5 = (double)rollList[5]/amt;

        double pc6 = (double)rollList[6]/amt;

        double pc7 = (double)rollList[7]/amt;

        double pc8 = (double)rollList[8]/amt;

        double pc9 = (double)rollList[9]/amt;

        double pc10 = (double)rollList[10]/amt;

        double pc11 = (double)rollList[11]/amt;

        double pc12 = (double)rollList[12]/amt;

        //display percentage of rolls

        Console.WriteLine("The percentage of 2's rolled was " + Math.Round(pc2*100, 2) + "%");

        Console.WriteLine("The percentage of 3's rolled was " + Math.Round(pc3*100, 2) + "%");

        Console.WriteLine("The percentage of 4's rolled was " + Math.Round(pc4*100, 2) + "%");

        Console.WriteLine("The percentage of 5's rolled was " + Math.Round(pc5*100, 2) + "%");

        Console.WriteLine("The percentage of 6's rolled was " + Math.Round(pc6*100, 2) + "%");

        Console.WriteLine("The percentage of 7's rolled was " + Math.Round(pc7*100, 2) + "%");

        Console.WriteLine("The percentage of 8's rolled was " + Math.Round(pc8*100, 2)+ "%");

        Console.WriteLine("The percentage of 9's rolled was " + Math.Round(pc9*100, 2) + "%");

        Console.WriteLine("The percentage of 10's rolled was " + Math.Round(pc10*100, 2) + "%");

        Console.WriteLine("The percentage of 11's rolled was " + Math.Round(pc11*100, 2) + "%");

        Console.WriteLine("The percentage of doubles's rolled was " + Math.Round(pc12*100, 2) + "%");

        Console.WriteLine(new String('=',40));

        Console.WriteLine("Would you like to restart the simulator?");

        againRestart: //restarts here if user input is invalid

        string againBool = Console.ReadLine();  //the string used to determine whether or not the user wants to restart again or not

        if (againBool.Substring(0,1).ToUpper() == "Y")//using the Substring method the program takes the first letter of user input

        {

            Console.WriteLine("Restarting program...");

            goto programRe;//goes back to to programRe (at start)

        }

        else if (againBool.Substring(0,1).ToUpper() == "N")

        {

            Console.WriteLine("The program has ended.");//ends program here

        }

        else

        {

            Console.WriteLine("Would you like to restart the program or not? Please input a valid answer!");

            goto againRestart; //error checking for input

        }

    }

}