{}
/* Name: Eshan Kiritharan
Date: July 24, 2024
Purpose of program:
- Develop a user-friendly program that implements coding components (ex: variables, loops, arrays, and methods) learned through the ICS3UE course.
- Create a probability game by simulating the roll of multiple dice at the user's discretion.
*/
// Import the Random class
import java.util.Random;
// Import the Scanner class.
import java.util.Scanner;
// Define the main class.
public class Main
{
// Define the rules method.
/* rules:
This method recieves no parameters and returns no values. It displays the rules of the game to the user when called.
Parameters: None
Returns: Void
*/
public static void rules()
{
// Print the rules of the game.
System.out.println("");
System.out.println("Select two or three dice to simulate the respective number of dice when playing.");
System.out.println("");
System.out.println("Your goal is to have the sum of the results of your dice match a winning number.");
System.out.println("");
System.out.println("If you have choose two dice, your winning numbers are 7, 9, 10 and 12. If you have chosen three dice, your winning numbers are 12, 13, 16, 17, and 18.");
System.out.println("");
}
// Define the twoDice method.
/* twoDice:
This method recieves a constant integer and a String array, but returns no values. It simulates a probability game with two dice when called.
Parameters: int, String []
Returns: Void
*/
public static void twoDice(int ROUNDS, String [] results)
{
// Create a new scanner object for user inputs.
Scanner scanner = new Scanner(System.in);
// Declare and initialize the variables and array for the program.
int diceA, diceB = 0;
int [] winNumber = {7, 9, 10, 12};
String input = "";
Boolean win = false;
// Instruct the user on the winning numbers of the game
System.out.println ("");
System.out.println ("Your winning numbers are 7, 9, 10 and 12.");
// Create a for loop that iterates the number of rounds the user has selected.
for (int i = 0; i < ROUNDS; i = i + 1)
{
// Prompt the user to enter [R] to simulate a dice roll.
System.out.println ("");
System.out.println ("Press the key [R] to roll the two dice.");
System.out.println ("");
// Store the input in the variable "input"
input = scanner.nextLine();
// Give the user a message depending on the input.
if (input.equals("R") || input.equals("r"))
{
// Initialize the boolean "win" to false
win = false;
// Generate a random number between 1 and 6 for the first dice.
diceA = (int)(Math.random() * 6) + 1;
// Generate a random number between 1 and 6 for the second dice.
diceB = (int)(Math.random() * 6) + 1;
// Print the results of the dice roll.
System.out.println ("");
System.out.println ("You rolled a " + diceA + " and a " + diceB + ", adding up to " + (diceA + diceB) + ".");
System.out.println ("");
// Create a for loop that iterates through the winning numbers array.
for (int j = 0; j < winNumber.length; j = j + 1)
{
if ((diceA + diceB) == winNumber[j])
{
// Output a winning message to the user.
System.out.println ("You won the round!");
// Input an element in the array cell results[i]
results[i] = "Round " + (i + 1) + ": Won";
// Set the boolean "win" to true
win = true;
// Break from the for loop
break;
}
}
if (!win)
{
// Give a losing message if the user does not win the round.
System.out.println ("You did not win the round.");
// Input an element in the array cell results[i]
results[i] = "Round " + (i + 1) + ": Lost";
}
}
else
{
// Output a losing message to the user for entering the wrong input.
System.out.println("");
System.out.println ("You did not press the key [R]. You automatically lose the round.");
// Input an element in the array cell results[i]
results[i] = "Round " + (i + 1) + ": Lost";
}
}
}
// Define the threeDice method.
/* threeDice:
This method recieves a constant integer and a String array, but returns no values. It simulates a probability game with three dice when called.
Parameters: int, String []
Returns: Void
*/
public static void threeDice(int ROUNDS, String [] results)
{
// Create a new scanner object for user inputs.
Scanner scanner = new Scanner(System.in);
// Declare and initialize the variables and array for the program.
int diceA, diceB, diceC = 0;
int [] winNumber = {12, 13, 16, 17, 18};
String input = "";
Boolean win = false;
// Instruct the user on the winning numbers of the game
System.out.println ("");
System.out.println ("Your winning numbers are 12, 13, 16, 17 and 18.");
// Create a for loop that iterates the number of rounds the user has selected.
for (int i = 0; i < ROUNDS; i = i + 1)
{
// Prompt the user to enter [R] to simulate a dice roll.
System.out.println ("");
System.out.println ("Press the key [R] to roll the three dice.");
System.out.println ("");
// Store the input in the variable "input"
input = scanner.nextLine();
// Give the user a message depending on the input.
if (input.equals("R") || input.equals("r"))
{
// Initialize the boolean "win" to false
win = false;
// Generate a random integer between 1 and 6 for the first, second and third dice.
diceA = (int)(Math.random() * 6) + 1;
diceB = (int)(Math.random() * 6) + 1;
diceC = (int)(Math.random() * 6) + 1;
// Print the results of the dice roll.
System.out.println ("");
System.out.println ("You rolled a " + diceA + ", a " + diceB + " and a " + diceC + ", adding up to " + (diceA + diceB + diceC) + ".");
System.out.println ("");
// Create a for loop that iterates through the winning numbers array.
for (int j = 0; j < winNumber.length; j = j + 1)
{
if ((diceA + diceB + diceC) == winNumber[j])
{
// Output a winning message to the user.
System.out.println ("You won the round!");
// Input an element in the array cell results[i]
results[i] = "Round " + (i + 1) + ": Won";
// Set the boolean "win" to true
win = true;
// Break from the for loop
break;
}
}
if (!win)
{
// Give a losing message if the user does not win the round.
System.out.println ("You did not win this round.");
// Input an element in the array cell results[i]
results[i] = "Round " + (i + 1) + ": Lost";
}
}
else
{
// Output a losing message to the user for entering the wrong input.
System.out.println("");
System.out.println ("You did not press the key [R]. You automatically lose the round.");
// Input an element in the array cell results[i]
results[i] = "Round " + (i + 1) + ": Lost";
}
}
}
// Define the display method.
/* display:
This method recieves a String array and a Boolean variable and returns a Boolean value. It displays the results of the game to the user when called.
Parameters: String [], Boolean
Returns: Boolean
*/
public static Boolean display(String [] results, Boolean exit)
{
// Create a new scanner object for user inputs.
Scanner scanner = new Scanner(System.in);
// Declare variables for the method
Boolean valid = false;
String input = "";
// Output a subheader for the results of the game
System.out.println ("");
System.out.println ("Your results for the game:");
System.out.println ("");
// Declare a for loop outputting the user's results
for (int i = 0; i < results.length; i = i + 1)
{
System.out.println(results[i]);
}
// Create a do while loop that iterates until the user enters a valid input.
do
{
// Prompt the user to play again or exit the program.
System.out.println("");
System.out.println("Would you like to play again or exit the program?");
System.out.println("");
System.out.println("Enter [P] to play again or [X] to exit.");
System.out.println("");
// Store the input in the variable "input"
input = scanner.nextLine();
// Give the user a message depending on the input.
if (input.equals("P") || input.equals("p"))
{
// Output a welcome back message to the user.
System.out.println("");
System.out.println("You have chosen to play again. Welcome back!");
System.out.println("");
// Set the boolean "valid" to true to exit the loop.
valid = true;
// Set the boolean "exit" to false to repeat the program.
exit = false;
}
else if (input.equals("X") || input.equals("x"))
{
// Output a farewell message to the user.
System.out.println("");
System.out.println("You have chosen to exit the program. Goodbye!");
System.out.println("");
// Set the boolean "valid" to true to exit the loop.
valid = true;
// Set the boolean "exit" to true to exit the program.
exit = true;
}
else
{
// Output a message to the user for entering an invalid input.
System.out.println("");
System.out.println("Invalid input. Please try again.");
// Set the boolean "valid" to false to repeat the prompt.
valid = false;
}
} while (!valid);
// Return the value of the boolean "exit".
return (exit);
}
// Define the main method.
public static void main(String[] args)
{
// Create a Scanner object for user inputs.
Scanner scanner = new Scanner(System.in);
// Declare and initialize variables, an array and a constant for the program.
String input = "";
int num = 0;
Boolean exit = true;
Boolean valid = true;
String [ ] results = new String [5];
final int ROUNDS = 5;
// Give a welcome message to the user
System.out.println("");
System.out.println("Welcome to Double or Triple Dice!");
System.out.println("");
System.out.println("This game will simulate the roll of two or three dice at your discretion.");
System.out.println("");
// Declare a while loop repeating until the user chooses to exit the program.
do
{
// Declare a while loop repeating until the user enters a valid input.
do
{
// Prompt the user to play the game immediately or view the rules
System.out.println("Press [P] to play the game or [R] to view the rules.");
System.out.println("");
input = scanner.nextLine();
// Give different outputs based on the user's input
if (input.equals("P")||input.equals("p"))
{
// Prompt the user to enter the number of dice they want to roll.
System.out.println("");
System.out.println("Enter the number of dice you want to roll (2 or 3):");
System.out.println("");
// Declare a while loop repeating until the user enters a valid input.
do
{
// Store the user's input in the string "input"
input = scanner.nextLine();
// Try to parse the user's input as an integer.
try
{
num = Integer.parseInt(input);
}
// Catch any exceptions and give an error message.
catch (NumberFormatException e)
{
System.out.println("");
System.out.println("Your input is not an integer. Please try again.");
valid = false;
}
// Give different outputs depending on the integer inputted/
switch (num)
{
case 2:
// Call the "twoDice" method
// Set the boolean variable "valid" to true to exit the loop.
valid = true;
twoDice(ROUNDS, results);
break;
case 3:
// Call the "threeDice" method
// Set the boolean variable "valid" to true to exit the loop.
valid = true;
threeDice(ROUNDS, results);
break;
default:
// Give an error message if the user enters an invalid integer
System.out.println("");
System.out.println("Please enter the number 2 or 3.");
System.out.println("");
// Set the boolean variable "valid" to false to continue the loop.
valid = false;
}
} while (!valid);
}
else if (input.equals("R")||input.equals("r"))
{
// Call the "rules" method to display the rules of the game
rules();
// Set the boolean "valid" to false to repeat the loop
valid = false;
}
else
{
// Output an error message to the user.
System.out.println("");
System.out.println("Invalid input. Please try again");
System.out.println("");
// Set the boolean variable "valid" to false to continue the loop.
valid = false;
}
} while (!valid);
// Call the "display" method to display the results to the user
exit = display(results, exit);
} while (!exit);
}
}