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https://github.com/coding-horror/basic-computer-games.git
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Merge pull request #94 from journich/main
Java versions of Dice and Guess
This commit is contained in:
Jeff Atwood
146
33 Dice/java/src/Dice.java
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146
33 Dice/java/src/Dice.java
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import java.util.Arrays;
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import java.util.Scanner;
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/**
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* Game of Dice
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* <p>
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* Based on the Basic game of Dice here
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* https://github.com/coding-horror/basic-computer-games/blob/main/33%20Dice/dice.bas
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* <p>
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* Note: The idea was to create a version of the 1970's Basic game in Java, without introducing
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* new features - no additional text, error checking, etc has been added.
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*/
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public class Dice {
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// Used for keyboard input
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private final Scanner kbScanner;
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private enum GAME_STATE {
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START_GAME,
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INPUT_AND_CALCULATE,
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RESULTS,
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GAME_OVER
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}
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// Current game state
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private GAME_STATE gameState;
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private int[] spots;
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public Dice() {
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kbScanner = new Scanner(System.in);
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gameState = GAME_STATE.START_GAME;
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}
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/**
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* Main game loop
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*/
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public void play() {
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do {
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switch (gameState) {
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case START_GAME:
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intro();
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spots = new int[12];
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gameState = GAME_STATE.INPUT_AND_CALCULATE;
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break;
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case INPUT_AND_CALCULATE:
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int howManyRolls = displayTextAndGetNumber("HOW MANY ROLLS? ");
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for (int i = 0; i < howManyRolls; i++) {
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int diceRoll = (int) (Math.random() * 6 + 1) + (int) (Math.random() * 6 + 1);
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// save dice roll in zero based array
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spots[diceRoll - 1]++;
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}
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gameState = GAME_STATE.RESULTS;
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break;
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case RESULTS:
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System.out.println("TOTAL SPOTS" + simulateTabs(8) + "NUMBER OF TIMES");
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for (int i = 1; i < 12; i++) {
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// show output using zero based array
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System.out.println(simulateTabs(5) + (i + 1) + simulateTabs(20) + spots[i]);
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}
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System.out.println();
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if (yesEntered(displayTextAndGetInput("TRY AGAIN? "))) {
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gameState = GAME_STATE.START_GAME;
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} else {
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gameState = GAME_STATE.GAME_OVER;
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}
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break;
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}
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} while (gameState != GAME_STATE.GAME_OVER);
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}
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private void intro() {
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System.out.println(simulateTabs(34) + "DICE");
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System.out.println(simulateTabs(15) + "CREATIVE COMPUTING MORRISTOWN, NEW JERSEY");
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System.out.println();
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System.out.println("THIS PROGRAM SIMULATES THE ROLLING OF A");
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System.out.println("PAIR OF DICE.");
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System.out.println("YOU ENTER THE NUMBER OF TIMES YOU WANT THE COMPUTER TO");
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System.out.println("'ROLL' THE DICE. WATCH OUT, VERY LARGE NUMBERS TAKE");
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System.out.println("A LONG TIME. IN PARTICULAR, NUMBERS OVER 5000.");
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}
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/*
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* Print a message on the screen, then accept input from Keyboard.
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* Converts input to an Integer
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*
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* @param text message to be displayed on screen.
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* @return what was typed by the player.
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*/
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private int displayTextAndGetNumber(String text) {
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return Integer.parseInt(displayTextAndGetInput(text));
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}
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/*
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* Print a message on the screen, then accept input from Keyboard.
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*
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* @param text message to be displayed on screen.
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* @return what was typed by the player.
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*/
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private String displayTextAndGetInput(String text) {
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System.out.print(text);
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return kbScanner.next();
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}
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/**
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* Checks whether player entered Y or YES to a question.
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*
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* @param text player string from kb
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* @return true of Y or YES was entered, otherwise false
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*/
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private boolean yesEntered(String text) {
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return stringIsAnyValue(text, "Y", "YES");
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}
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/**
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* Check whether a string equals one of a variable number of values
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* Useful to check for Y or YES for example
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* Comparison is case insensitive.
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*
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* @param text source string
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* @param values a range of values to compare against the source string
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* @return true if a comparison was found in one of the variable number of strings passed
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*/
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private boolean stringIsAnyValue(String text, String... values) {
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return Arrays.stream(values).anyMatch(str -> str.equalsIgnoreCase(text));
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}
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/**
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* Simulate the old basic tab(xx) command which indented text by xx spaces.
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*
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* @param spaces number of spaces required
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* @return String with number of spaces
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*/
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private String simulateTabs(int spaces) {
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char[] spacesTemp = new char[spaces];
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Arrays.fill(spacesTemp, ' ');
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return new String(spacesTemp);
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}
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}
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6
33 Dice/java/src/DiceGame.java
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6
33 Dice/java/src/DiceGame.java
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public class DiceGame {
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public static void main(String[] args) {
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Dice dice = new Dice();
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dice.play();
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}
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}
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161
41 Guess/java/src/Guess.java
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161
41 Guess/java/src/Guess.java
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@@ -0,0 +1,161 @@
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import java.util.Arrays;
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import java.util.Scanner;
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/**
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* Game of Guess
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* <p>
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* Based on the Basic game of Guess here
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* https://github.com/coding-horror/basic-computer-games/blob/main/41%20Guess/guess.bas
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* <p>
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* Note: The idea was to create a version of the 1970's Basic game in Java, without introducing
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* new features - no additional text, error checking, etc has been added.
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*/
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public class Guess {
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// Used for keyboard input
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private final Scanner kbScanner;
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private enum GAME_STATE {
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STARTUP,
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INPUT_RANGE,
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DEFINE_COMPUTERS_NUMBER,
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GUESS,
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GAME_OVER
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}
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// Current game state
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private GAME_STATE gameState;
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// User supplied maximum number to guess
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private int limit;
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// Computers calculated number for the player to guess
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private int computersNumber;
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// Number of turns the player has had guessing
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private int tries;
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// Optimal number of turns it should take to guess
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private int calculatedTurns;
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public Guess() {
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kbScanner = new Scanner(System.in);
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gameState = GAME_STATE.STARTUP;
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}
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/**
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* Main game loop
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*/
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public void play() {
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do {
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switch (gameState) {
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case STARTUP:
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intro();
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gameState = GAME_STATE.INPUT_RANGE;
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break;
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case INPUT_RANGE:
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limit = displayTextAndGetNumber("WHAT LIMIT DO YOU WANT? ");
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calculatedTurns = (int) (Math.log(limit) / Math.log(2)) + 1;
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gameState = GAME_STATE.DEFINE_COMPUTERS_NUMBER;
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break;
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case DEFINE_COMPUTERS_NUMBER:
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tries = 1;
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System.out.println("I'M THINKING OF A NUMBER BETWEEN 1 AND " + limit);
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computersNumber = (int) (Math.random() * limit + 1);
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gameState = GAME_STATE.GUESS;
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break;
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case GUESS:
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int playersGuess = displayTextAndGetNumber("NOW YOU TRY TO GUESS WHAT IT IS ");
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// Allow player to restart game with entry of 0
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if (playersGuess == 0) {
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linePadding();
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gameState = GAME_STATE.STARTUP;
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break;
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}
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if (playersGuess == computersNumber) {
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System.out.println("THAT'S IT! YOU GOT IT IN " + tries + " TRIES.");
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if (tries < calculatedTurns) {
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System.out.println("VERY ");
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}
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System.out.println("GOOD.");
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System.out.println("YOU SHOULD HAVE BEEN ABLE TO GET IT IN ONLY " + calculatedTurns);
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linePadding();
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gameState = GAME_STATE.DEFINE_COMPUTERS_NUMBER;
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break;
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} else if (playersGuess < computersNumber) {
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System.out.println("TOO LOW. TRY A BIGGER ANSWER.");
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} else {
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System.out.println("TOO HIGH. TRY A SMALLER ANSWER.");
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}
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tries++;
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break;
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}
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} while (gameState != GAME_STATE.GAME_OVER);
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}
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private void intro() {
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System.out.println(simulateTabs(33) + "GUESS");
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System.out.println(simulateTabs(15) + "CREATIVE COMPUTING MORRISTOWN, NEW JERSEY");
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System.out.println();
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System.out.println("THIS IS A NUMBER GUESSING GAME. I'LL THINK");
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System.out.println("OF A NUMBER BETWEEN 1 AND ANY LIMIT YOU WANT.");
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System.out.println("THEN YOU HAVE TO GUESS WHAT IT IS.");
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}
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/**
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* Print a predefined number of blank lines
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*
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*/
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private void linePadding() {
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for (int i = 1; i <= 5; i++) {
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System.out.println();
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}
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}
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/*
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* Print a message on the screen, then accept input from Keyboard.
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* Converts input to an Integer
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*
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* @param text message to be displayed on screen.
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* @return what was typed by the player.
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*/
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private int displayTextAndGetNumber(String text) {
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return Integer.parseInt(displayTextAndGetInput(text));
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}
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/*
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* Print a message on the screen, then accept input from Keyboard.
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*
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* @param text message to be displayed on screen.
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* @return what was typed by the player.
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*/
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private String displayTextAndGetInput(String text) {
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System.out.print(text);
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return kbScanner.next();
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}
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/**
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* Simulate the old basic tab(xx) command which indented text by xx spaces.
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*
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* @param spaces number of spaces required
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* @return String with number of spaces
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*/
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private String simulateTabs(int spaces) {
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char[] spacesTemp = new char[spaces];
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Arrays.fill(spacesTemp, ' ');
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return new String(spacesTemp);
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}
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}
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6
41 Guess/java/src/GuessGame.java
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6
41 Guess/java/src/GuessGame.java
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@@ -0,0 +1,6 @@
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public class GuessGame {
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public static void main(String[] args) {
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Guess guess = new Guess();
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guess.play();
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}
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}
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