Question

Required in JAVA language

Write a program that enables a user to play number guessing games. The following is a nutshell description of a number guessing game.

+ a random number is generated

+ loop prompting the user to enter guesses

until the user guesses the number or hits

the maximum number of allowed guesses or

enters the "quit" sentinel value

The rest of this specification documents number guessing games in more detail. The documentation uses manifest constants that can be used by your program.

Playing a Guessing Game

Use a class Random object to get a random number between MIN_NUMBER (1) and MAX_NUMBER (205), inclusive.

Print the ENTER_GUESS_PROMPT and read the user input. Loop until one of the following are true.

+ the user enters the random number

- print WINNER_MSG along with number of guesses

+ the user enters MAX_GUESSES (10) wrong guesses

- print LOSER_MSG along with the random number

+ the user enters QUIT_VALUE (-1)

- print QUITTER_MSG

The current game ends in all three of these cases.

(see "End of Game Processing" section)

If the user enters BACKDOOR_VALUE (-314), print the random number and re-prompt the user to enter a guess. BACKDOOR_VALUE input is not counted as a wrong guess.

Print a INPUT_TOO_SMALL_MSG or INPUT_TOO_LARGE_MSG message when the user enters a number that is either less than MIN_NUMBER or greater than MAX_NUMBER, respectively. Re-prompt the user to enter a guess after printing the message. Invalid inputs are not counted as wrong guesses.

Print a NOPE_NOPE_MSG message when the user enters a wrong guess more than once and re-prompt the user to enter a guess. Duplicate wrong guesses are not counted as wrong guess.

Print a NOPE_MSG when the user enters a wrong guess. At HINT_THRESHOLD (5) wrong guesses, print a HIGHER_MSG or LOWER_MSG message. Re-prompt the user to enter a guess.

End of Game Processing

If number of games played equals MAX_GAMES (4), then do "Post Game Playing Processing." Otherwise, issue the PLAY_AGAIN_PROMPT. Do "Post Game Playing Processing" if user enters 'n', else start new game.

Post Game Playing Processing

Print the following prior to exiting the program.

number of games played

number of games won

number of games lost

number of games quit

winning percentage

Also print game summaries for each game played.

games played: 3; won: 1; lost: 1; quit: 1; winning pct.: 33.33%

game 1: Won; the number was: 145; #guesses: 6; backdoored: true

...guesses in ascending order: 1,2,3,4,5,

game 2: Quit; the number was: 49; #guesses: 3; backdoored: false

...guesses in ascending order: 1,2,3,

game 3: Lost; the number was: 182; #guesses: 10; backdoored: true

...guesses in ascending order: 1,5,144,150,181,183,191,199,200,201,

Manifest Constants

Your program can implements I_GG to use the manifest constants defined in the interface. I_GG can be copied/pasted after (or before) the declaration of your class.

To Support Testing (i.e. test mode)

If the program is executed with a command-line argument, then the random number for each game is DFLT_NUMBER (60).

The motivation for supporting test mode is to play games without having to play games.

shell-prompt: cat gg.in

-314 10 20 30 foo 40 50 70 60 y

10 20 10 0 210 -1 y

1 2 3 4 5 6 7 8 9 10 11 12 y

1 2 3 1 2 60 w y

shell-prompt: cat gg.in | java GG testing > gg.out

Example Games

*** Hello! Have fun playing the CSC205AA guessing game. ***

enter a guess between 1 and 205 (-1 to quit): 1 // ENTER_GUESS_PROMPT

nope... // NOPE_MSG

enter a guess between 1 and 205 (-1 to quit): 2

nope...

enter a guess between 1 and 205 (-1 to quit): 3

nope...

enter a guess between 1 and 205 (-1 to quit): 4

nope...

enter a guess between 1 and 205 (-1 to quit): 5

nope... higher // NOPE_MSG with hint

enter a guess between 1 and 205 (-1 to quit): 3

you've already guessed that wrong guess... // NOPE_NOPE_MSG

enter a guess between 1 and 205 (-1 to quit): 314

*** invalid input -- must be less than 206 // INPUT_TOO_LARGE_MSG

enter a guess between 1 and 205 (-1 to quit): -5

*** invalid input -- must be greater than 0 // INPUT_TOO_SMALL_MSG

enter a guess between 1 and 205 (-1 to quit): -314

...the number is 145

enter a guess between 1 and 205 (-1 to quit): 145

you're a winner... # of guesses: 6 // WINNER_MSG

Do you want to play again (n or y)? y // PLAY_AGAIN_PROMPT

enter a guess between 1 and 205 (-1 to quit): 1

nope...

enter a guess between 1 and 205 (-1 to quit): 2

nope...

enter a guess between 1 and 205 (-1 to quit): 3

nope...

enter a guess between 1 and 205 (-1 to quit): -1

you're a quitter... the number was 49 // QUITTER_MSG

Do you want to play again (n or y)? what   

*** invalid input -- must be n or y // NOT_YN_MSG

Do you want to play again (n or y)? y

enter a guess between 1 and 205 (-1 to quit): -314

...the number is 182

enter a guess between 1 and 205 (-1 to quit): 150

nope...

enter a guess between 1 and 205 (-1 to quit): 200

nope...

enter a guess between 1 and 205 (-1 to quit): 1

nope...

enter a guess between 1 and 205 (-1 to quit): 5

nope...

enter a guess between 1 and 205 (-1 to quit): 200

you've already guessed that wrong guess...

enter a guess between 1 and 205 (-1 to quit): 206

*** invalid input -- must be less than 206

enter a guess between 1 and 205 (-1 to quit): 0

*** invalid input -- must be greater than 0

enter a guess between 1 and 205 (-1 to quit): 144

nope... higher

enter a guess between 1 and 205 (-1 to quit): foo

*** invalid input -- must be an whole number

enter a guess between 1 and 205 (-1 to quit): 201

nope... lower

enter a guess between 1 and 205 (-1 to quit): 183

nope... lower

enter a guess between 1 and 205 (-1 to quit): 200

you've already guessed that wrong guess...

enter a guess between 1 and 205 (-1 to quit): 199

nope... lower

enter a guess between 1 and 205 (-1 to quit): -314

...the number is 182

enter a guess between 1 and 205 (-1 to quit): 181

nope... higher

enter a guess between 1 and 205 (-1 to quit): 191

too many guesses entered... the number was 182 // LOSER_MSG

Do you want to play again (n or y)? n

*** Thanks for playing the CSC205AA guessing game. ***

games played: 3; won: 1; lost: 1; quit: 1; winning pct.: 33.33%

game 1: Won; the number was: 145; #guesses: 6; backdoored: true

...guesses in ascending order: 1,2,3,4,5,

game 2: Quit; the number was: 49; #guesses: 3; backdoored: false

...guesses in ascending order: 1,2,3,

game 3: Lost; the number was: 182; #guesses: 10; backdoored: true

...guesses in ascending order: 1,5,144,150,181,183,191,199,200,201,

Example Games (second round to test MAX_GAMES played)

*** Hello! Have fun playing the CSC205AA guessing game. ***

enter a guess between 1 and 205 (-1 to quit): -1

you're a quitter... the number was 157

Do you want to play again (n or y)? y

enter a guess between 1 and 205 (-1 to quit): -1

you're a quitter... the number was 4

Do you want to play again (n or y)? y

enter a guess between 1 and 205 (-1 to quit): -314

...the number is 35

enter a guess between 1 and 205 (-1 to quit): 35

you're a winner... # of guesses: 1

Do you want to play again (n or y)? y

enter a guess between 1 and 205 (-1 to quit): -1

you're a quitter... the number was 118

Maximum number (4) of games have been played.

*** Thanks for playing the CSC205AA guessing game. ***

games played: 4; won: 1; lost: 0; quit: 3; winning pct.: 25.00%

game 1: Quit; the number was: 157; #guesses: 0; backdoored: false

game 2: Quit; the number was: 4; #guesses: 0; backdoored: false

game 3: Won; the number was: 35; #guesses: 1; backdoored: true

game 4: Quit; the number was: 118; #guesses: 0; backdoored: false

Example Games (test mode)

*** Hello! Have fun playing the CSC205AA guessing game. ***

enter a guess between 1 and 205 (-1 to quit): -314

...the number is 60

enter a guess between 1 and 205 (-1 to quit): 10

nope...

enter a guess between 1 and 205 (-1 to quit): 20

nope...

enter a guess between 1 and 205 (-1 to quit): 30

nope...

enter a guess between 1 and 205 (-1 to quit): foo

*** invalid input -- must be an whole number

enter a guess between 1 and 205 (-1 to quit): 40

nope...

enter a guess between 1 and 205 (-1 to quit): 50

nope... higher

enter a guess between 1 and 205 (-1 to quit): 70

nope... lower

enter a guess between 1 and 205 (-1 to quit): 60

you're a winner... # of guesses: 7

Do you want to play again (n or y)? y

enter a guess between 1 and 205 (-1 to quit): 10

nope...

enter a guess between 1 and 205 (-1 to quit): 20

nope...

enter a guess between 1 and 205 (-1 to quit): 10

you've already guessed that wrong guess...

enter a guess between 1 and 205 (-1 to quit): 0

*** invalid input -- must be greater than 0

enter a guess between 1 and 205 (-1 to quit): 210

*** invalid input -- must be less than 206

enter a guess between 1 and 205 (-1 to quit): -1

you're a quitter... the number was 60

Do you want to play again (n or y)? y

enter a guess between 1 and 205 (-1 to quit): 1

nope...

enter a guess between 1 and 205 (-1 to quit): 2

nope...

enter a guess between 1 and 205 (-1 to quit): 3

nope...

enter a guess between 1 and 205 (-1 to quit): 4

nope...

enter a guess between 1 and 205 (-1 to quit): 5

nope... higher

enter a guess between 1 and 205 (-1 to quit): 6

nope... higher

enter a guess between 1 and 205 (-1 to quit): 7

nope... higher

enter a guess between 1 and 205 (-1 to quit): 8

nope... higher

enter a guess between 1 and 205 (-1 to quit): 9

nope... higher

enter a guess between 1 and 205 (-1 to quit): 10

too many guesses entered... the number was 60

Do you want to play again (n or y)? 11

*** invalid input -- must be n or y

Do you want to play again (n or y)? 12

*** invalid input -- must be n or y

Do you want to play again (n or y)? y

enter a guess between 1 and 205 (-1 to quit): 1

nope...

enter a guess between 1 and 205 (-1 to quit): 2

nope...

enter a guess between 1 and 205 (-1 to quit): 3

nope...

enter a guess between 1 and 205 (-1 to quit): 1

you've already guessed that wrong guess...

enter a guess between 1 and 205 (-1 to quit): 2

you've already guessed that wrong guess...

enter a guess between 1 and 205 (-1 to quit): 60

you're a winner... # of guesses: 4

Maximum number (4) of games played.

*** Thanks for playing the CSC205AA guessing game. ***

games played: 4; won: 2; lost: 1; quit: 1; winning pct.: 50.00%

game 1: Won; the number was: 60; #guesses: 7; backdoored: true

...guesses in ascending order: 10,20,30,40,50,70,

game 2: Quit; the number was: 60; #guesses: 2; backdoored: false

...guesses in ascending order: 10,20,

game 3: Lost; the number was: 60; #guesses: 10; backdoored: false

...guesses in ascending order: 1,2,3,4,5,6,7,8,9,10,

game 4: Won; the number was: 60; #guesses: 4; backdoored: false

...guesses in ascending order: 1,2,3,

Answer 1

GuessingGame.java

import java.util.Scanner;
import java.util.Random;
public class GuessingGame {

    private static final int MIN_NUMBER = 1;
    private static final int MAX_NUMBER = 205;
    private static final int QUIT_VALUE = -1;
    private static final int MAX_GAMES = 4;
    private static final int MAX_GUESSES = 10;
    private static final int HINT_THRESHOLD = 5;
    private static final int BACKDOOR_VALUE = -314;

    private static final String NOPE_MSG = "nope...";
    private static final String NOPE_NOPE_MSG =
      "you've already guessed that wrong guess...";
    private static final String INVALID_INPUT_BEGIN =
      "*** invalid input -- ";
    private static final String INVALID_INPUT_LESS_MIN_MSG =
      INVALID_INPUT_BEGIN + "must be greater than " + (MIN_NUMBER - 1);
    private static final String INVALID_INPUT_GREATER_MAX_MSG =
      INVALID_INPUT_BEGIN + "must be less than " + (MAX_NUMBER + 1);
    private static final String INVALID_INPUT_YN_MSG =
      INVALID_INPUT_BEGIN + "must be n or y";
    private static final String WINNER_MSG =
      "you're a winner... # of guesses: ";
    private static final String LOSER_MSG =
      "too many guesses entered... the number was ";
    private static final String QUITTER_MSG =
      "you're a quitter... the number was ";
    private static final String MAX_GAMES_PLAYED_MSG =
      "you've played the maximum number (" + MAX_GAMES + ") of games";
    private static final String ENTER_GUESS_PROMPT =
      "enter a guess between " + MIN_NUMBER + " and " + MAX_NUMBER +
      " (" + QUIT_VALUE + " to quit): ";
    private static final String PLAY_AGAIN_PROMPT =
      "Do you want to play again (n or y)? ";

    private static final String BOLD_BEGIN = "*** ";
    private static final String BOLD_END = " ***";
    private static final String PLAY_MSG = " playing the CSC" + MAX_NUMBER +
                                          " guessing game." + BOLD_END;
    private static final String WELCOME_MSG =
      BOLD_BEGIN + "Hello! Have fun" + PLAY_MSG;
    private static final String THANKS_MSG =
      BOLD_BEGIN + "Thanks for" + PLAY_MSG;
  
    static Random rng = new Random(System.currentTimeMillis());
    static Scanner stdin = new Scanner(System.in);
    static Scanner scan = new Scanner(System.in);
          
    static int guess;
    static int numberOfGames = 0;
    static int numberOfWins = 0;
    static int numberOfLoses = 0;
    static boolean endStart = true; // Check if this boolean is used
  
        public static void main(String[] args) {
      
            PlayGame();
            PostGame();
            EndGame();
        }
      
        public static boolean check(int item, int[] chekarray){
            for (int i = 0; i < chekarray.length - 1; i++){
                if (chekarray[i] == item)
                    return true;
          
       }
       return false;
        }
      
        public static void PlayGame() {
      
            int guessCounter = 0;
            int n = MIN_NUMBER + rng.nextInt(MAX_NUMBER);
            int[] history = new int[10];
            boolean found = false;
          
            System.out.println(WELCOME_MSG);
            boolean test = true;
            do{
                found = false;
                System.out.println();
                System.out.print(ENTER_GUESS_PROMPT);
                guess = stdin.nextInt();
              
                if (check(guess, history)){
                    found = true;
       }

                history[guessCounter] = guess;
                guessCounter = guessCounter + 1;
              
                if(guess < MIN_NUMBER && guess != BACKDOOR_VALUE &&
                        guess != QUIT_VALUE){
                    if (found) {
                        System.out.print(NOPE_NOPE_MSG + "\n");
           guessCounter--;
                    } else {
           System.out.println(INVALID_INPUT_LESS_MIN_MSG + "\n");
                        guessCounter--;
                    }
                }
              
                if(guess > MAX_NUMBER){
                    if (found) {
           System.out.print(NOPE_NOPE_MSG + "\n");
                            guessCounter--;
                    } else {
           System.out.println(INVALID_INPUT_GREATER_MAX_MSG +
                                "\n");
                        guessCounter--;
                    }
       }
              
                // Giving the user the answer
                if(guess == BACKDOOR_VALUE){
                    System.out.println(n);
                        guessCounter--;
                }
              
                // Quiting the round and giving the chance to end the game
                if(guess == QUIT_VALUE){
                    System.out.println((QUITTER_MSG + n) + "\n" +
                            PLAY_AGAIN_PROMPT);
                    numberOfLoses++;
                    String val = scan.next();
                        if(val.equalsIgnoreCase("y")){
                            numberOfGames++;  
                                PlayGame();
                        }
                      
                        if(val.equalsIgnoreCase("n")){
                            System.out.println(THANKS_MSG);
                            test = false;
                            PostGame();
                            break;
                        }
                      
                      
                }
              
                // Correct guess on the last try
                if(guessCounter == MAX_GUESSES && guess == n){
                    numberOfGames++;
                    System.out.println(WINNER_MSG + guessCounter);
                        numberOfWins++;
                        System.out.println(PLAY_AGAIN_PROMPT);
                        String val = scan.next();
                        if(val.equalsIgnoreCase("y"))
                                PlayGame();  
                        if(val.equalsIgnoreCase("n")){
                            System.out.println(THANKS_MSG);
                            test = false;
                            PostGame();
                            break;
                        }
                }
              
                // Max games
                if(numberOfGames == MAX_GAMES){
                    System.out.println(MAX_GAMES_PLAYED_MSG);
                    test = false;
                    PostGame();
                    break;
                }
              
                // Max guesses
                if(guessCounter == MAX_GUESSES){
                    numberOfGames++;
                    System.out.println(LOSER_MSG+ n + "\n" +PLAY_AGAIN_PROMPT);
                    numberOfLoses++;
                    String val = scan.next();
                        if(val.equalsIgnoreCase("y"))
                                PlayGame();  
                        if(val.equalsIgnoreCase("n")){
                            System.out.println(THANKS_MSG);
                            test = false;
                            PostGame();
                            break;
                        }
                }
              
                // Guessing in the range of the bonds
                    if(guess > MIN_NUMBER || guess < MAX_NUMBER){
                        if (found) {
                            System.out.print(NOPE_NOPE_MSG + "\n");  
                                guessCounter -= 1;
                        } else {
                            System.out.print(NOPE_MSG);
                        }
                        if(guess == n){
                            numberOfGames++;
                            System.out.println(WINNER_MSG + guessCounter);
                            numberOfWins++;
                            System.out.println(PLAY_AGAIN_PROMPT);
                            String val = scan.next();
                            if(val.equalsIgnoreCase("y"))
                                    PlayGame();
                            if(val.equalsIgnoreCase("n")){
                                System.out.println(THANKS_MSG);
                                test = false;
                                PostGame();
                                break;
                            }
                        }  
                    }
                  
                // Giving hints after 5 tries until the max # of guesses
                if(guessCounter == HINT_THRESHOLD ||
                    guessCounter == (HINT_THRESHOLD + 1) ||
                    guessCounter == (HINT_THRESHOLD + 2) ||
                    guessCounter == (HINT_THRESHOLD + 3) ||
                    guessCounter == (HINT_THRESHOLD + 4) ||
                    guessCounter == (HINT_THRESHOLD + 5)){
                    if(guess != n && guess > n){
                        System.out.println("lower");
                    }
                    if(guess != n && guess < n){
                        System.out.println("higher");
                    }
                }
                  
            }
            while(guess > MIN_NUMBER || guess < MAX_NUMBER);
        }
      
        // Post game information
        public static void PostGame() {
            int winningPct = 0;
            System.out.print("Played: " + numberOfGames + ";" +
                    " Won: " + numberOfWins + ";" +
                    " Lost: " + numberOfLoses + ";");
            if(numberOfGames != 0){
                System.out.println(" winningPct: " +
                        (winningPct = numberOfWins/numberOfGames));
                EndGame();
            }
            else{
            winningPct =0;}
            EndGame();
        }
      
        // Ending the game
        public static void EndGame(){
          
        }

}