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https://github.com/coding-horror/basic-computer-games.git
synced 2025-12-22 23:26:40 -08:00
moved implementations to individual folders
This commit is contained in:
Thomas Kwashnak
234
75_Roulette/java/oop/Roulette.java
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234
75_Roulette/java/oop/Roulette.java
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.PrintStream;
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import java.util.ArrayList;
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import java.util.HashSet;
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import java.util.Random;
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import java.time.LocalDate;
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import java.time.format.DateTimeFormatter;
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import java.time.format.FormatStyle;
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public class Roulette {
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public static void main(String args[]) throws Exception {
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Roulette r = new Roulette();
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r.play();
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}
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private BufferedReader reader;
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private PrintStream writer;
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private int house; // how much money does the house have
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private int player; // how much money does the player have
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private Wheel wheel = new Wheel();
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public Roulette() {
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reader = new BufferedReader(new InputStreamReader(System.in));
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writer = System.out;
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house = 100000;
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player = 1000;
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}
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// for a test / cheat mode -- set the random number generator to a known value
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private void setSeed(long l) {
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wheel.setSeed(l);
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}
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public void play() {
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try {
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intro();
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writer.println("WELCOME TO THE ROULETTE TABLE\n" +
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"DO YOU WANT INSTRUCTIONS");
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String instr = reader.readLine();
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if (!instr.toUpperCase().startsWith("N"))
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instructions();
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while (betAndSpin()) { // returns true if the game is to continue
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}
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if (player <= 0) {
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// player ran out of money
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writer.println("THANKS FOR YOUR MONEY.\nI'LL USE IT TO BUY A SOLID GOLD ROULETTE WHEEL");
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} else {
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// player has money -- print them a check
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writer.println("TO WHOM SHALL I MAKE THE CHECK");
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String payee = reader.readLine();
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writer.println("-".repeat(72));
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tab(50); writer.println("CHECK NO. " + (new Random().nextInt(100) + 1));
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writer.println();
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tab(40); writer.println(LocalDate.now().format(DateTimeFormatter.ofLocalizedDate(FormatStyle.LONG)));
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writer.println("\n\nPAY TO THE ORDER OF-----" + payee + "-----$ " + player);
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writer.print("\n\n");
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tab(10); writer.println("THE MEMORY BANK OF NEW YORK\n");
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tab(40); writer.println("THE COMPUTER");
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tab(40); writer.println("----------X-----\n");
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writer.println("-".repeat(72));
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writer.println("COME BACK SOON!\n");
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}
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}
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catch (IOException e) {
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// this should not happen
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System.err.println("System error:\n" + e);
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}
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}
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/* Write the starting introduction */
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private void intro() throws IOException {
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tab(32); writer.println("ROULETTE");
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tab(15); writer.println("CREATIVE COMPUTING MORRISTOWN, NEW JERSEY\n\n\n");
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}
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/* Display the game instructions */
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private void instructions() {
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String[] instLines = new String[] {
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"THIS IS THE BETTING LAYOUT",
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" (*=RED)",
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"" ,
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" 1* 2 3*",
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" 4 5* 6 ",
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" 7* 8 9*",
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"10 11 12*",
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"---------------",
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"13 14* 15 ",
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"16* 17 18*",
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"19* 20 21*",
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"22 23* 24 ",
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"---------------",
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"25* 26 27*",
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"28 29 30*",
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"31 32* 33 ",
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"34* 35 36*",
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"---------------",
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" 00 0 ",
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"" ,
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"TYPES OF BETS",
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"" ,
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"THE NUMBERS 1 TO 36 SIGNIFY A STRAIGHT BET",
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"ON THAT NUMBER.",
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"THESE PAY OFF 35:1",
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"" ,
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"THE 2:1 BETS ARE:",
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" 37) 1-12 40) FIRST COLUMN",
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" 38) 13-24 41) SECOND COLUMN",
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" 39) 25-36 42) THIRD COLUMN",
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"" ,
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"THE EVEN MONEY BETS ARE:",
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" 43) 1-18 46) ODD",
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" 44) 19-36 47) RED",
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" 45) EVEN 48) BLACK",
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"",
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" 49)0 AND 50)00 PAY OFF 35:1",
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" NOTE: 0 AND 00 DO NOT COUNT UNDER ANY",
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" BETS EXCEPT THEIR OWN.",
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"",
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"WHEN I ASK FOR EACH BET, TYPE THE NUMBER",
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"AND THE AMOUNT, SEPARATED BY A COMMA.",
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"FOR EXAMPLE: TO BET $500 ON BLACK, TYPE 48,500",
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"WHEN I ASK FOR A BET.",
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"",
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"THE MINIMUM BET IS $5, THE MAXIMUM IS $500.",
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"" };
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writer.println(String.join("\n", instLines));
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}
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/* Take a set of bets from the player, then spin the wheel and work out the winnings *
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* This returns true if the game is to continue afterwards
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*/
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private boolean betAndSpin() throws IOException {
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int betCount = 0;
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while (betCount == 0) { // keep asking how many bets until we get a good answer
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try {
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writer.println("HOW MANY BETS");
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String howMany = reader.readLine();
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betCount = Integer.parseInt(howMany.strip());
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if ((betCount < 1) || (betCount > 100)) betCount = 0; // bad -- set zero and ask again
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}
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catch (NumberFormatException e) {
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// this happens if the input is not a number
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writer.println("INPUT ERROR");
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}
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}
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HashSet<Integer> betsMade = new HashSet<>(); // Bet targets already made, so we can spot repeats
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ArrayList<Bet> bets = new ArrayList<>(); // All the bets for this round
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while (bets.size() < betCount) {
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Bet bet = new Bet(0, 0); // an invalid bet to hold the place
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while (!bet.isValid()) { // keep asking until it is valid
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try {
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writer.println("NUMBER " + (bets.size() + 1));
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String fields[] = reader.readLine().split(",");
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if (fields.length == 2) {
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bet = new Bet(Integer.parseInt(fields[0].strip()),
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Integer.parseInt(fields[1].strip()));
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}
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}
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catch (NumberFormatException e) {
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writer.println("INPUT ERROR");
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}
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}
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// Check if there is already a bet on the same target
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if (betsMade.contains(bet.target)) {
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writer.println("YOU MADE THAT BET ONCE ALREADY,DUM-DUM");
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} else {
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betsMade.add(bet.target); // note this target has now been bet on
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bets.add(bet);
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}
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}
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writer.println("SPINNING\n\n");
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wheel.spin(); // this deliberately takes some random amount of time
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writer.println(wheel.value());
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// go through the bets, and evaluate each one
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int betNumber = 1;
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for (Bet b : bets) {
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int multiplier = b.winsOn(wheel);
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if (multiplier == 0) {
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// lost the amount of the bet
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writer.println("YOU LOSE " + b.amount + " DOLLARS ON BET " + betNumber);
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house += b.amount;
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player -= b.amount;
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} else {
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// won the amount of the bet, multiplied by the odds
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int winnings = b.amount * multiplier;
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writer.println("YOU WIN " + winnings + " DOLLARS ON BET " + betNumber);
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house -= winnings;
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player += winnings;
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}
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++betNumber;
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}
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writer.println("\nTOTALS:\tME\tYOU\n\t" + house + "\t" + player);
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if (player <= 0) {
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writer.println("OOPS! YOU JUST SPENT YOUR LAST DOLLAR");
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return false; // do not repeat since the player has no more money
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}
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if (house <= 0) {
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writer.println("YOU BROKE THE HOUSE!");
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player = 101000; // can't win more than the house started with
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return false; // do not repeat since the house has no more money
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}
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// player still has money, and the house still has money, so ask the player
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// if they want to continue
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writer.println("AGAIN");
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String doContinue = reader.readLine();
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// repeat if the answer was not "n" or "no"
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return (!doContinue.toUpperCase().startsWith("N"));
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}
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// utility to print n spaces for formatting
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private void tab(int n) {
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writer.print(" ".repeat(n));
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}
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}
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