Make a game of rock paper scissors . But with two additions. After a game is won

ID: 3670201 • Letter: M

Question

Make a game of rock paper scissors . But with two additions. After a game is won by either side, ask if the user wants to play again. And if a round is a tie, continue that game until someone wins. When the user quits, display how many games they won and lost. Ties don’t count for anything, because a tie doesn’t end the game. Boy howdy do you ever want to start with a flowchart. You don’t need to turn in the flowchart.

Use a do-while or while loop.

Sample output:

Please enter “S” for scissors, “R” for rock, or “P” for paper.

I picked rock.

You lose!

Would you like to play again? (y/n)

Please enter “S” for scissors, “R” for rock, or “P” for paper.

I picked scissors.

Tie! Try again!

Please enter “S” for scissors, “R” for rock, or “P” for paper.

I picked paper.

You win!

Would you like to play again? (y/n)

You won 1 game and lost 1 game.

Explanation / Answer

import java.util.*;

public class HelloWorld {

   /*Replay logic is abstracted from RPS class to main's game loop*/
   public static void main(String[] args){
       String answer = "";

       /*Game loop will only end when user selects choice not to play another game*/
       while (!answer.equals("N")) {

           /*Start a new game by asking for a user choice*/
           System.out.println(" Please enter S for scissors, R for rock, or P for paper.");
           Scanner sc = new Scanner(System.in);
           String usrmsg = sc.nextLine().toUpperCase();

           /*Converting answer to numerical equivalent*/
           if (usrmsg.equals("R")) {
               new RockPaperScissors(0);
           } else if (usrmsg.equals("P")) {
               new RockPaperScissors(1);
           } else {
               new RockPaperScissors(2);
           }

           /*Prompt user to see if they'd like to play another game, skip replay prompt altogether if tied*/
           boolean t = RockPaperScissors.tied;
           if (t) {
               System.out.println("Tie! Try again!");

           } else {
               System.out.println("Would you like to play again? (y/n)");
               answer = sc.nextLine().toUpperCase();
           }
       }

       /*Ending message*/
       int w = RockPaperScissors.wins;
       int l = RockPaperScissors.losses;
       System.out.println("You won " + w + " game(s) and lost " + l + " game(s).");
   }
}

class RockPaperScissors {
   static HashMap<Integer, String> rps = new HashMap<Integer, String>();
   /* Yeah I know using static here is kind of hacky but I was lazy and it was
   * easier this way on top of what I had already
   */
   static int wins = 0;
   static int losses = 0;
   static boolean tied = false;

   /*Standard initializer for single game of Rock/Paper/Scissors*/
   public RockPaperScissors(int selection) {
       /*Defining number -> choice relationship*/
       rps.put(0, "rock");
       rps.put(1, "paper");
       rps.put(2, "scissors");

determineWinner(selection);
}

   private static void determineWinner(int opponentNum) {
       Random tRNG = new Random();
       int myNum = tRNG.nextInt(3);       //Making a random number between 0 and 3

/*Print what I picked*/
System.out.println("I picked " + rps.get(myNum) + ".");

       /*We chose the same thing*/
       if (myNum == opponentNum) {
           System.out.println("It was a tie!");
           RockPaperScissors.tied = true;

       /*Losing situations: (myNum, opponentNum) -> (0,2), (1,0), (2,1)*/
       } else if (myNum - opponentNum == 1 || myNum - opponentNum == -2) {
           System.out.println("You lose!");
           RockPaperScissors.tied = false;
           losses += 1;

       /*If you did not tie and did not lose, you won*/
       } else {
           System.out.println("You win!");
           RockPaperScissors.tied = false;
           wins += 1;
       }
   }
}

output

Please enter S for scissors, R for rock, or P for paper.
S
I picked paper.
You win!
Would you like to play again? (y/n)
N
You won 1 game(s) and lost 0 game(s).

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Make a game of rock paper scissors . But with two additions. After a game is won

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