mirror of
https://github.com/coding-horror/basic-computer-games.git
synced 2025-12-21 23:00:43 -08:00
Removed spaces from top-level directory names.
Spaces tend to cause annoyances in a Unix-style shell environment. This change fixes that.
This commit is contained in:
Chris Reuter
242
73_Reverse/java/Reverse.java
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242
73_Reverse/java/Reverse.java
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import java.util.Scanner;
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import java.lang.Math;
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/**
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* Game of Reverse
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* <p>
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* Based on the BASIC game of Reverse here
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* https://github.com/coding-horror/basic-computer-games/blob/main/73%20Reverse/reverse.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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* Converted from BASIC to Java by Darren Cardenas.
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*/
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public class Reverse {
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private final int NUMBER_COUNT = 9;
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private final Scanner scan; // For user input
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private enum Step {
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INITIALIZE, PERFORM_REVERSE, TRY_AGAIN, END_GAME
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}
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public Reverse() {
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scan = new Scanner(System.in);
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} // End of constructor Reverse
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public void play() {
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showIntro();
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startGame();
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} // End of method play
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private static void showIntro() {
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System.out.println(" ".repeat(31) + "REVERSE");
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System.out.println(" ".repeat(14) + "CREATIVE COMPUTING MORRISTOWN, NEW JERSEY");
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System.out.println("\n\n");
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System.out.println("REVERSE -- A GAME OF SKILL");
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System.out.println("");
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} // End of method showIntro
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private void startGame() {
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int index = 0;
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int numMoves = 0;
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int numReverse = 0;
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int tempVal = 0;
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int[] numList = new int[NUMBER_COUNT + 1];
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Step nextStep = Step.INITIALIZE;
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String userResponse = "";
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System.out.print("DO YOU WANT THE RULES? ");
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userResponse = scan.nextLine();
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if (!userResponse.toUpperCase().equals("NO")) {
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this.printRules();
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}
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// Begin outer while loop
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while (true) {
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// Begin outer switch
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switch (nextStep) {
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case INITIALIZE:
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// Make a random list of numbers
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numList[1] = (int)((NUMBER_COUNT - 1) * Math.random() + 2);
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for (index = 2; index <= NUMBER_COUNT; index++) {
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// Keep generating lists if there are duplicates
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while (true) {
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numList[index] = (int)(NUMBER_COUNT * Math.random() + 1);
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// Search for duplicates
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if (!this.findDuplicates(numList, index)) {
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break;
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}
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}
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}
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System.out.println("");
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System.out.println("HERE WE GO ... THE LIST IS:");
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numMoves = 0;
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this.printBoard(numList);
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nextStep = Step.PERFORM_REVERSE;
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break;
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case PERFORM_REVERSE:
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System.out.print("HOW MANY SHALL I REVERSE? ");
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numReverse = Integer.parseInt(scan.nextLine());
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if (numReverse == 0) {
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nextStep = Step.TRY_AGAIN;
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} else if (numReverse > NUMBER_COUNT) {
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System.out.println("OOPS! TOO MANY! I CAN REVERSE AT MOST " + NUMBER_COUNT);
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nextStep = Step.PERFORM_REVERSE;
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} else {
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numMoves++;
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for (index = 1; index <= (int)(numReverse / 2.0); index++) {
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tempVal = numList[index];
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numList[index] = numList[numReverse - index + 1];
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numList[numReverse - index + 1] = tempVal;
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}
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this.printBoard(numList);
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nextStep = Step.TRY_AGAIN;
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// Check for a win
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for (index = 1; index <= NUMBER_COUNT; index++) {
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if (numList[index] != index) {
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nextStep = Step.PERFORM_REVERSE;
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}
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}
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if (nextStep == Step.TRY_AGAIN) {
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System.out.println("YOU WON IT IN " + numMoves + " MOVES!!!");
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System.out.println("");
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}
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}
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break;
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case TRY_AGAIN:
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System.out.println("");
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System.out.print("TRY AGAIN (YES OR NO)? ");
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userResponse = scan.nextLine();
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if (userResponse.toUpperCase().equals("YES")) {
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nextStep = Step.INITIALIZE;
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} else {
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nextStep = Step.END_GAME;
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}
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break;
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case END_GAME:
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System.out.println("");
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System.out.println("O.K. HOPE YOU HAD FUN!!");
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return;
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default:
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System.out.println("INVALID STEP");
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break;
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} // End outer switch
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} // End outer while loop
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} // End of method startGame
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public boolean findDuplicates(int[] board, int length) {
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int index = 0;
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for (index = 1; index <= length - 1; index++) {
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// Identify duplicates
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if (board[length] == board[index]) {
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return true; // Found a duplicate
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}
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}
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return false; // No duplicates found
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} // End of method findDuplicates
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public void printBoard(int[] board) {
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int index = 0;
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System.out.println("");
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for (index = 1; index <= NUMBER_COUNT; index++) {
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System.out.format("%2d", board[index]);
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}
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System.out.println("\n");
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} // End of method printBoard
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public void printRules() {
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System.out.println("");
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System.out.println("THIS IS THE GAME OF 'REVERSE'. TO WIN, ALL YOU HAVE");
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System.out.println("TO DO IS ARRANGE A LIST OF NUMBERS (1 THROUGH " + NUMBER_COUNT + ")");
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System.out.println("IN NUMERICAL ORDER FROM LEFT TO RIGHT. TO MOVE, YOU");
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System.out.println("TELL ME HOW MANY NUMBERS (COUNTING FROM THE LEFT) TO");
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System.out.println("REVERSE. FOR EXAMPLE, IF THE CURRENT LIST IS:");
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System.out.println("");
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System.out.println("2 3 4 5 1 6 7 8 9");
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System.out.println("");
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System.out.println("AND YOU REVERSE 4, THE RESULT WILL BE:");
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System.out.println("");
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System.out.println("5 4 3 2 1 6 7 8 9");
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System.out.println("");
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System.out.println("NOW IF YOU REVERSE 5, YOU WIN!");
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System.out.println("");
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System.out.println("1 2 3 4 5 6 7 8 9");
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System.out.println("");
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System.out.println("NO DOUBT YOU WILL LIKE THIS GAME, BUT");
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System.out.println("IF YOU WANT TO QUIT, REVERSE 0 (ZERO).");
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System.out.println("");
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} // End of method printRules
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public static void main(String[] args) {
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Reverse game = new Reverse();
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game.play();
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} // End of method main
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} // End of class Reverse
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