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Merge pull request #224 from journich/main

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Fur Trader game - Java Port
This commit is contained in:
Jeff Atwood
2021-03-10 12:38:29 -08:00
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parent 8377350a48 1ce47dd896
commit d53808331d
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38 Fur Trader/java/src/FurTrader.java Normal file
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import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;
/**
* Game of Fur Trader
* <p>
* Based on the Basic game of Fur Trader here
* https://github.com/coding-horror/basic-computer-games/blob/main/38%20Fur%20Trader/furtrader.bas
* <p>
* Note: The idea was to create a version of the 1970's Basic game in Java, without introducing
* new features - no additional text, error checking, etc has been added.
*/
public class FurTrader {
public static final double START_SAVINGS_AMOUNT = 600.0;
public static final int STARTING_FURS = 190;
public static final int FORT_HOCHELAGA_MONTREAL = 1;
public static final int FORT_STADACONA_QUEBEC = 2;
public static final int FORT_NEW_YORK = 3;
public static final String MINK = "MINK";
public static final int MINK_ENTRY = 0;
public static final String BEAVER = "BEAVER";
public static final int BEAVER_ENTRY = 1;
public static final String ERMINE = "ERMINE";
public static final int ERMINE_ENTRY = 2;
public static final String FOX = "FOX";
public static final int FOX_ENTRY = 3;
// Used for keyboard input
private final Scanner kbScanner;
private enum GAME_STATE {
STARTUP,
INIT,
TRADE_AT_FORT,
TRADE_SUMMARY,
TRADE_AGAIN,
GAME_OVER
}
// Current game state
private GAME_STATE gameState;
private double savings;
private double minkPrice;
private double beaverPrice;
private double erminePrice;
private double foxPrice;
private ArrayList<Pelt> pelts;
private boolean playedOnce;
public FurTrader() {
kbScanner = new Scanner(System.in);
gameState = GAME_STATE.INIT;
playedOnce = false;
}
/**
* Main game loop
*/
public void play() {
do {
switch (gameState) {
case INIT:
savings = START_SAVINGS_AMOUNT;
// Only display initial game heading once
if (!playedOnce) {
playedOnce = true;
gameStartupMessage();
}
intro();
if (yesEntered(displayTextAndGetInput("DO YOU WISH TO TRADE FURS? "))) {
System.out.println("YOU HAVE $" + formatNumber(savings) + " SAVINGS.");
System.out.println("AND " + STARTING_FURS + " FURS TO BEGIN THE EXPEDITION.");
// Create a new array of Pelts.
pelts = initPelts();
gameState = GAME_STATE.STARTUP;
} else {
gameState = GAME_STATE.GAME_OVER;
}
break;
case STARTUP:
// Reset count of pelts (all types)
resetPelts();
// This is where we will go to after processing all pelts.
gameState = GAME_STATE.TRADE_AT_FORT;
int totalPelts = 0;
// Cycle through all types of pelts
for (int i = 0; i < pelts.size(); i++) {
Pelt pelt = pelts.get(i);
int number = getPeltCount(pelt.getName());
totalPelts += number;
if (totalPelts > STARTING_FURS) {
System.out.println("YOU MAY NOT HAVE THAT MANY FURS.");
System.out.println("DO NOT TRY TO CHEAT. I CAN ADD.");
System.out.println("YOU MUST START AGAIN.");
System.out.println();
// Restart the game
gameState = GAME_STATE.INIT;
break;
} else {
// update count entered by player and save back to ArrayList.
pelt.setPeltCount(number);
pelts.set(i, pelt);
// Its possible for the player to put all their pelt allocation
// into one or more different pelts. They don't have to use all four types.
// If we have an exact count of pelts matching the MAX
// don't bother continuing to ask for more.
if (totalPelts == STARTING_FURS) {
break;
}
}
}
// Only move onto the trading part of the game if the player didn't add too many pelts
if (gameState != GAME_STATE.STARTUP) {
// Set ermine and beaver default prices here, depending on where you trade these
// defaults will either be used or overwritten with other values.
// check out the tradeAt??? methods for more info.
erminePrice = ((.15 * Math.random() + .95) * (Math.pow(10, 2) + .5)) / Math.pow(10, 2);
beaverPrice = ((.25 * Math.random() + 1.00) * (Math.pow(10, 2) + .5)) / Math.pow(10, 2);
System.out.println();
}
break;
case TRADE_AT_FORT:
extendedTradingInfo();
int answer = displayTextAndGetNumber("ANSWER 1, 2, OR 3. ");
System.out.println();
// Now show the details of the fort they are about to trade
// and give the player the chance to NOT proceed.
// A "No" or false means they do not want to change to another fort
if (!confirmFort(answer)) {
switch (answer) {
case 1:
tradeAtFortHochelagaMontreal();
gameState = GAME_STATE.TRADE_SUMMARY;
break;
case 2:
tradeAtFortStadaconaQuebec();
gameState = GAME_STATE.TRADE_SUMMARY;
break;
case 3:
// Did the player and party all die?
if (!tradeAtFortNewYork()) {
gameState = GAME_STATE.GAME_OVER;
} else {
gameState = GAME_STATE.TRADE_SUMMARY;
}
break;
}
break;
}
case TRADE_SUMMARY:
System.out.println();
double beaverTotal = beaverPrice * pelts.get(BEAVER_ENTRY).getNumber();
System.out.print("YOUR BEAVER SOLD FOR $ " + formatNumber(beaverTotal));
double foxTotal = foxPrice * pelts.get(FOX_ENTRY).getNumber();
System.out.println(simulateTabs(5) + "YOUR FOX SOLD FOR $ " + formatNumber(foxTotal));
double erMineTotal = erminePrice * pelts.get(ERMINE_ENTRY).getNumber();
System.out.print("YOUR ERMINE SOLD FOR $ " + formatNumber(erMineTotal));
double minkTotal = minkPrice * pelts.get(MINK_ENTRY).getNumber();
System.out.println(simulateTabs(5) + "YOUR MINK SOLD FOR $ " + formatNumber(minkTotal));
savings += beaverTotal + foxTotal + erMineTotal + minkTotal;
System.out.println();
System.out.println("YOU NOW HAVE $" + formatNumber(savings) + " INCLUDING YOUR PREVIOUS SAVINGS");
gameState = GAME_STATE.TRADE_AGAIN;
break;
case TRADE_AGAIN:
if (yesEntered(displayTextAndGetInput("DO YOU WANT TO TRADE FURS NEXT YEAR? "))) {
gameState = GAME_STATE.STARTUP;
} else {
gameState = GAME_STATE.GAME_OVER;
}
}
} while (gameState != GAME_STATE.GAME_OVER);
}
/**
* Create all pelt types with a count of zero
*
* @return Arraylist of initialised Pelt objects.
*/
private ArrayList<Pelt> initPelts() {
ArrayList<Pelt> tempPelts = new ArrayList<>();
tempPelts.add(new Pelt(MINK, 0));
tempPelts.add(new Pelt(BEAVER, 0));
tempPelts.add(new Pelt(ERMINE, 0));
tempPelts.add(new Pelt(FOX, 0));
return tempPelts;
}
/**
* Display a message about trading at each fort and confirm if the player wants to trade
* at ANOTHER fort
*
* @param fort the fort in question
* @return true if YES was typed by player
*/
private boolean confirmFort(int fort) {
switch (fort) {
case FORT_HOCHELAGA_MONTREAL:
System.out.println("YOU HAVE CHOSEN THE EASIEST ROUTE. HOWEVER, THE FORT");
System.out.println("IS FAR FROM ANY SEAPORT. THE VALUE");
System.out.println("YOU RECEIVE FOR YOUR FURS WILL BE LOW AND THE COST");
System.out.println("OF SUPPLIES HIGHER THAN AT FORTS STADACONA OR NEW YORK.");
break;
case FORT_STADACONA_QUEBEC:
System.out.println("YOU HAVE CHOSEN A HARD ROUTE. IT IS, IN COMPARSION,");
System.out.println("HARDER THAN THE ROUTE TO HOCHELAGA BUT EASIER THAN");
System.out.println("THE ROUTE TO NEW YORK. YOU WILL RECEIVE AN AVERAGE VALUE");
System.out.println("FOR YOUR FURS AND THE COST OF YOUR SUPPLIES WILL BE AVERAGE.");
break;
case FORT_NEW_YORK:
System.out.println("YOU HAVE CHOSEN THE MOST DIFFICULT ROUTE. AT");
System.out.println("FORT NEW YORK YOU WILL RECEIVE THE HIGHEST VALUE");
System.out.println("FOR YOUR FURS. THE COST OF YOUR SUPPLIES");
System.out.println("WILL BE LOWER THAN AT ALL THE OTHER FORTS.");
break;
}
System.out.println("DO YOU WANT TO TRADE AT ANOTHER FORT?");
return yesEntered(displayTextAndGetInput("ANSWER YES OR NO "));
}
/**
* Trade at the safest fort - Fort Hochelaga
* No chance of anything bad happening, so just calculate amount per pelt
* and return
*/
private void tradeAtFortHochelagaMontreal() {
savings -= 160.0;
System.out.println();
System.out.println("SUPPLIES AT FORT HOCHELAGA COST $150.00.");
System.out.println("YOUR TRAVEL EXPENSES TO HOCHELAGA WERE $10.00.");
minkPrice = ((.2 * Math.random() + .7) * (Math.pow(10, 2) + .5)) / Math.pow(10, 2);
erminePrice = ((.2 * Math.random() + .65) * (Math.pow(10, 2) + .5)) / Math.pow(10, 2);
beaverPrice = ((.2 * Math.random() + .75) * (Math.pow(10, 2) + .5)) / Math.pow(10, 2);
foxPrice = ((.2 * Math.random() + .8) * (Math.pow(10, 2) + .5)) / Math.pow(10, 2);
}
private void tradeAtFortStadaconaQuebec() {
savings -= 140.0;
System.out.println();
minkPrice = ((.2 * Math.random() + .85) * (Math.pow(10, 2) + .5)) / Math.pow(10, 2);
erminePrice = ((.2 * Math.random() + .8) * (Math.pow(10, 2) + .5)) / Math.pow(10, 2);
beaverPrice = ((.2 * Math.random() + .9) * (Math.pow(10, 2) + .5)) / Math.pow(10, 2);
// What happened during the trip to the fort?
int tripResult = (int) (Math.random() * 10) + 1;
if (tripResult <= 2) {
// Find the Beaver pelt in our Arraylist
Pelt beaverPelt = pelts.get(BEAVER_ENTRY);
// Pelts got stolen, so update to a count of zero
beaverPelt.lostPelts();
// Update it back in the ArrayList
pelts.set(BEAVER_ENTRY, beaverPelt);
System.out.println("YOUR BEAVER WERE TOO HEAVY TO CARRY ACROSS");
System.out.println("THE PORTAGE. YOU HAD TO LEAVE THE PELTS, BUT FOUND");
System.out.println("THEM STOLEN WHEN YOU RETURNED.");
} else if (tripResult <= 6) {
System.out.println("YOU ARRIVED SAFELY AT FORT STADACONA.");
} else if (tripResult <= 8) {
System.out.println("YOUR CANOE UPSET IN THE LACHINE RAPIDS. YOU");
System.out.println("LOST ALL YOUR FURS.");
// Clear out all pelts.
resetPelts();
} else if (tripResult <= 10) {
// Fox pelts not cured
System.out.println("YOUR FOX PELTS WERE NOT CURED PROPERLY.");
System.out.println("NO ONE WILL BUY THEM.");
// Bug because Fox furs were not calculated above in original basic program
// Find the Beaver pelt in our Arraylist
Pelt foxPelt = pelts.get(FOX_ENTRY);
// Pelts got stolen, so update to a count of zero
foxPelt.lostPelts();
// Update it back in the ArrayList
pelts.set(FOX_ENTRY, foxPelt);
}
System.out.println("SUPPLIES AT FORT STADACONA COST $125.00.");
System.out.println("YOUR TRAVEL EXPENSES TO STADACONA WERE $15.00.");
}
private boolean tradeAtFortNewYork() {
boolean playerAlive = true;
savings -= 105.0;
System.out.println();
minkPrice = ((.2 * Math.random() + 1.05) * (Math.pow(10, 2) + .5)) / Math.pow(10, 2);
foxPrice = ((.2 * Math.random() + 1.1) * (Math.pow(10, 2) + .5)) / Math.pow(10, 2);
// What happened during the trip to the fort?
int tripResult = (int) (Math.random() * 10) + 1;
if (tripResult <= 2) {
System.out.println("YOU WERE ATTACKED BY A PARTY OF IROQUOIS.");
System.out.println("ALL PEOPLE IN YOUR TRADING GROUP WERE");
System.out.println("KILLED. THIS ENDS THE GAME.");
playerAlive = false;
} else if (tripResult <= 6) {
System.out.println("YOU WERE LUCKY. YOU ARRIVED SAFELY");
System.out.println("AT FORT NEW YORK.");
} else if (tripResult <= 8) {
System.out.println("YOU NARROWLY ESCAPED AN IROQUOIS RAIDING PARTY.");
System.out.println("HOWEVER, YOU HAD TO LEAVE ALL YOUR FURS BEHIND.");
// Clear out all pelts.
resetPelts();
} else if (tripResult <= 10) {
beaverPrice /= 2;
minkPrice /= 2;
System.out.println("YOUR MINK AND BEAVER WERE DAMAGED ON YOUR TRIP.");
System.out.println("YOU RECEIVE ONLY HALF THE CURRENT PRICE FOR THESE FURS.");
}
if (playerAlive) {
System.out.println("SUPPLIES AT NEW YORK COST $80.00.");
System.out.println("YOUR TRAVEL EXPENSES TO NEW YORK WERE $25.00.");
}
return playerAlive;
}
/**
* Reset pelt count for all Pelt types to zero.
*/
private void resetPelts() {
for (int i = 0; i < pelts.size(); i++) {
Pelt pelt = pelts.get(i);
pelt.lostPelts();
pelts.set(i, pelt);
}
}
/**
* Return a pelt object containing the user entered number of pelts.
*
* @param peltName Name of pelt (Type)
* @return number of pelts assigned by player
*/
private int getPeltCount(String peltName) {
return displayTextAndGetNumber("HOW MANY " + peltName + " PELTS DO YOU HAVE? ");
}
private void extendedTradingInfo() {
System.out.println("YOU MAY TRADE YOUR FURS AT FORT 1, FORT 2,");
System.out.println("OR FORT 3. FORT 1 IS FORT HOCHELAGA (MONTREAL)");
System.out.println("AND IS UNDER THE PROTECTION OF THE FRENCH ARMY.");
System.out.println("FORT 2 IS FORT STADACONA (QUEBEC) AND IS UNDER THE");
System.out.println("PROTECTION OF THE FRENCH ARMY. HOWEVER, YOU MUST");
System.out.println("MAKE A PORTAGE AND CROSS THE LACHINE RAPIDS.");
System.out.println("FORT 3 IS FORT NEW YORK AND IS UNDER DUTCH CONTROL.");
System.out.println("YOU MUST CROSS THROUGH IROQUOIS LAND.");
System.out.println();
}
private void gameStartupMessage() {
System.out.println(simulateTabs(31) + "FUR TRADER");
System.out.println(simulateTabs(15) + "CREATIVE COMPUTING MORRISTOWN, NEW JERSEY");
System.out.println();
}
private void intro() {
System.out.println("YOU ARE THE LEADER OF A FRENCH FUR TRADING EXPEDITION IN ");
System.out.println("1776 LEAVING THE LAKE ONTARIO AREA TO SELL FURS AND GET");
System.out.println("SUPPLIES FOR THE NEXT YEAR. YOU HAVE A CHOICE OF THREE");
System.out.println("FORTS AT WHICH YOU MAY TRADE. THE COST OF SUPPLIES");
System.out.println("AND THE AMOUNT YOU RECEIVE FOR YOUR FURS WILL DEPEND");
System.out.println("ON THE FORT THAT YOU CHOOSE.");
System.out.println();
}
/**
* Format a double number to two decimal points for output.
*
* @param number double number
* @return formatted number as a string
*/
private String formatNumber(double number) {
return String.format("%.2f", number);
}
/*
* Print a message on the screen, then accept input from Keyboard.
* Converts input to an Integer
*
* @param text message to be displayed on screen.
* @return what was typed by the player.
*/
private int displayTextAndGetNumber(String text) {
return Integer.parseInt(displayTextAndGetInput(text));
}
/*
* Print a message on the screen, then accept input from Keyboard.
*
* @param text message to be displayed on screen.
* @return what was typed by the player.
*/
private String displayTextAndGetInput(String text) {
System.out.print(text);
return kbScanner.next();
}
/**
* Simulate the old basic tab(xx) command which indented text by xx spaces.
*
* @param spaces number of spaces required
* @return String with number of spaces
*/
private String simulateTabs(int spaces) {
char[] spacesTemp = new char[spaces];
Arrays.fill(spacesTemp, ' ');
return new String(spacesTemp);
}
/**
* Checks whether player entered Y or YES to a question.
*
* @param text player string from kb
* @return true of Y or YES was entered, otherwise false
*/
private boolean yesEntered(String text) {
return stringIsAnyValue(text, "Y", "YES");
}
/**
* Check whether a string equals one of a variable number of values
* Useful to check for Y or YES for example
* Comparison is case insensitive.
*
* @param text source string
* @param values a range of values to compare against the source string
* @return true if a comparison was found in one of the variable number of strings passed
*/
private boolean stringIsAnyValue(String text, String... values) {
return Arrays.stream(values).anyMatch(str -> str.equalsIgnoreCase(text));
}
}

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38 Fur Trader/java/src/FurTraderGame.java Normal file
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public class FurTraderGame {
public static void main(String[] args) {
FurTrader furTrader = new FurTrader();
furTrader.play();
}
}

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38 Fur Trader/java/src/Pelt.java Normal file
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/**
* Pelt object - tracks the name and number of pelts the player has for this pelt type
*/
public class Pelt {
private final String name;
private int number;
public Pelt(String name, int number) {
this.name = name;
this.number = number;
}
public void setPeltCount(int pelts) {
this.number = pelts;
}
public int getNumber() {
return this.number;
}
public String getName() {
return this.name;
}
public void lostPelts() {
this.number = 0;
}
}