Question

Ch 4 Program 5: RockPaperScissors.java                                                 

Please adhere to the Standards for Programming Assignments and the Java Coding Guidelines.

In the game Rock Paper Scissors, two players simultaneously choose one of three options: rock, paper, or scissors. If both players choose the same option, then the result is a tie. However, if they choose differently, the winner is determined as follows

• Rock beats scissors because a rock can break a part of scissors
• Scissors beats paper because scissors can cut paper
• Paper beats rock because a piece of paper can cover a rock

1. Create a game, in which the computer randomly chooses rock, paper, or scissors(without revealing it).

2. Let the player enter “rock,” “paper” or “scissors” as a string and then determine the winner or a tie. The player can enter rock, paper, or scissors using either upper case, lower case, or a combination of cases.

3. The program must validate the player’s choice. If the input is invalid, then the program writes an appropriate message, informing the player. If the input is valid, then the program informs the player who won(computer or the player ) or is it a tie.

4. The program then asks the player if he/she wants to continue playing. The player must answer either “yes” or “No” in either upper or lower case.

5. The game ends when the player chooses to stop. It then prints the total number of player’s wins, losses, and ties.

Hints:  

• You can assign a number to each “rock,” paper,” and “scissors” strings, in order to determine what the computer picks randomly. For example, if the random number generated is a “1” then computer picks rock and so on.  
• Review methods in String and Random classes to find the relevant ones.

• Do not try to write the entire program in one go. It is much easier to write a small piece and test it, then write another small piece and test it. For example, start by writing the game logic without worrying about the input validation. Then add the code that validates the input. Then add each additional step, one at a time. You should test your program with simple test inputs to check that you handle each case.

Example Output with Valid inputs:

********Rock Paper Scissors*************** Enter one of the following: -- Rock -- Paper --Scissors Rock You picked rock Computer picked rock Winner: Tie Do you want to play again: Y/N ?   y ********Rock Paper Scissors*************** Enter one of the following: -- Rock -- Paper --Scissors Scissors You picked scissors Computer picked rock Winner: Computer Do you want to play again: Y/N ?   y ********Rock Paper Scissors*************** Enter one of the following: -- Rock -- Paper --Scissors paper You picked paper Computer picked rock Winner: Player Do you want to play again: Y/N ?   N You won 1 times. You lost 1 time. We tied 1 times. Good Bye!

********Rock Paper Scissors*************** Enter one of the following : -- Rock -- Paper --Scissors Scissors You picked scissors Computer picked paper Winner: Player Do you want to play again: Y/N?   y ********Rock Paper Scissors*************** Enter one of the following : -- Rock -- Paper --Scissors rack Invalid Choice! Do you want to play again: Y/N?   y ********Rock Paper Scissors*************** Enter one of the following : -- Rock -- Paper --Scissors Rock You picked rock Computer picked paper Winner: Computer Do you want to play again: Y/N ?   n You won 1 times. You lost 1 times. We tied 0 times. Goodbye!!

Example Output with an Invalid input:

********Rock Paper Scissors*************** Enter one of the following: -- Rock -- Paper --Scissors Scissors You picked scissors Computer picked paper Winner: You Do you want to play again: Y/N ?   y ********Rock Paper Scissors*************** Enter one of the following: -- Rock -- Paper --Scissors rack Invalid Choice! Do you want to play again: Y/N ?   Y ********Rock Paper Scissors*************** Enter one of the following: -- Rock -- Paper --Scissors Rock You picked rock Computer picked paper Winner: Computer Do you want to play again: Y/N ?   n You won 1 times. You lost 1 times. We tied 0 times. Goodbye!!

Answer 1

Answer :

The program is using 0 for scissor, 11 for paper, 22 for rock.So, choose the numbers accordingly.

And the Score will be given in this way (Loss:-1,Win:+1,Draw:0)

The program consists of a class name "Game" and if else conditions for different conditions.

import java.util.Scanner;
public class Game{
public static void main(String[] Args) {
boolean yes = true;
boolean no=false;
int b;
char choice;
int score=0;
String winner ;
  
System.out.println("Write 0 for ✂,11 for✋ and 22 for?");
System.out.println("and then press the enter key.");
System.out.println("Good luck.");
for(int i=0;i<5;i++){

String str1,str2;
int a = (int)(Math.random()*3); // will generate random paper, rock, scissors

Scanner sc = new Scanner(System.in);
b = sc.nextInt();

if (b==0){
System.out.println("Your move:✂");
if(no){
no=!no;
}
}   
if (b==11){
System.out.println(b);
if(no){
no=!no;
}
System.out.println("Your move:✋");
}

if (b==22){
System.out.println("Your move:?");
if(no){
no=!no;
}
}
if(b!=00&&b!=11&&b!=22){
System.out.println("Invalid move.");
no=true;
i--;
}
if(!no){
if (a==0){
System.out.println("comp move:✂");
}   
if (a==1){
System.out.println("comp move:✋");
}

if (a==2){
System.out.println("comp move:?"); }
}

if(a==b){
System.out.println("Tie");
}

else{
  
if(a==0&&b==11){
System.out.println("Computer won");
score--;
}
if(a==0&&b==22){
score++;
winner = "you have";
System.out.println(winner+" won");
}
if(a==1&&b==11){
System.out.println("TIE");
}
if(a==1&&b==22){
winner = "computer";
System.out.println(winner+" has won");
score--;
}
if(a==1&&b==0){
System.out.println("You won");
score++;
}
if(a==2&&b==22){
winner = "";
System.out.println("TIE");
}
if(a==2&&b==11){
System.out.println("You won.");
score++;
}
if (a==2&&b==0){
System.out.println("Computer won.");
score--;
}
}
}
System.out.println("Nice game.");
System.out.println("score="+score+"(Loss:-1,Win:+1,Draw:0)"); //Result
if (score == 0){
System.out.println("Game draw.");
}
else if(score >0){
System.out.println("You won the series.");
}
else if(score < 0){
System.out.println("Computer won the series.");
}
}
}

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