add game Prime

Author: Prototype206

README.md

@@ -32,5 +32,9 @@
 ![Progression win](screenshots/ProgressionGame-win.png)
 ### Defeat in the app Progression 
 ![Progression lose](screenshots/ProgressionGame-lose.png)
+### Victory in the app Prime 
+![Prime win](screenshots/PrimeGame-win.png)
+### Defeat in the app Prime 
+![Prime lose](screenshots/PrimeGame-lose.png)
 ### Exiting the app   
 ![Exit](screenshots/Exiting-app.png)

app/src/main/java/hexlet/code/App.java

@@ -4,6 +4,7 @@
 import hexlet.code.games.Calc;
 import hexlet.code.games.Even;
 import hexlet.code.games.GCD;
+import hexlet.code.games.Prime;
 import hexlet.code.games.Progression;
 
 public class App {
@@ -12,7 +13,7 @@ public static void main(String[] args) {
 		try(Scanner scanner = new Scanner(System.in)) {
 
 			System.out.println("Please enter the game number and press Enter.");
-			System.out.print("1 - Greet\n2 - Even\n3 - Cacl\n4 - GCD\n5 - Progression\n0 - Exit\nYour choice: ");
+			System.out.print("1 - Greet\n2 - Even\n3 - Cacl\n4 - GCD\n5 - Progression\n6 - Prime\n0 - Exit\nYour choice: ");
 			int usersChoise = 0;
 
 			try {
@@ -46,6 +47,11 @@ public static void main(String[] args) {
 				Progression.startGameProgression();
 				Engine.runGame(Engine.PROGRESSION_GAME_NUMBER, scanner);
 				break;
+			case 6:
+				Cli.greetings(scanner);
+				Prime.startGamePrime();
+				Engine.runGame(Engine.PRIME_GAME_NUMBER, scanner);
+				break;
 			case 0:
 				break;
 			default:

app/src/main/java/hexlet/code/Engine.java

@@ -5,6 +5,7 @@
 import hexlet.code.games.Calc;
 import hexlet.code.games.Even;
 import hexlet.code.games.GCD;
+import hexlet.code.games.Prime;
 import hexlet.code.games.Progression;
 
 public final class Engine {
@@ -16,6 +17,7 @@ public final class Engine {
 	static final int CALC_GAME_NUMBER = 3;
 	static final int GCD_GAME_NUMBER = 4;
 	static final int PROGRESSION_GAME_NUMBER = 5;
+	static final int PRIME_GAME_NUMBER = 6;
 
 	private Engine() {
 		throw new AssertionError("Utility class instantiation prohibited");
@@ -27,21 +29,24 @@ public static void runGame(int gameNumber, Scanner scanner) {
 			usersAnswer.setLength(0);
 
 			switch(gameNumber) {
-			case EVEN_GAME_NUMBER:
-				correctAnswer.append(Even.generateCorrectAnswer());
-				break;
-			case CALC_GAME_NUMBER:
-				correctAnswer.append(Calc.generateCorrectAnswer());
-				break;
-			case GCD_GAME_NUMBER:
-				correctAnswer.append(GCD.generateCorrectAnswer());
-				break;
-			case PROGRESSION_GAME_NUMBER:
-				correctAnswer.append(Progression.generateCorrectAnswer());
-				Progression.generateProgression();
-				break;
-			default:
-				throw new IllegalArgumentException("Unknown number of game " + gameNumber);
+				case EVEN_GAME_NUMBER:
+					correctAnswer.append(Even.generateCorrectAnswer());
+					break;
+				case CALC_GAME_NUMBER:
+					correctAnswer.append(Calc.generateCorrectAnswer());
+					break;
+				case GCD_GAME_NUMBER:
+					correctAnswer.append(GCD.generateCorrectAnswer());
+					break;
+				case PROGRESSION_GAME_NUMBER:
+					correctAnswer.append(Progression.generateCorrectAnswer());
+					Progression.generateProgression();
+					break;
+				case PRIME_GAME_NUMBER:
+					correctAnswer.append(Prime.generateCorrectAnswer());
+					break;
+				default:
+					throw new IllegalArgumentException("Unknown number of game " + gameNumber);
 			}
 
 			System.out.print("Your answer: ");

app/src/main/java/hexlet/code/games/Prime.java

@@ -0,0 +1,39 @@
+package hexlet.code.games;
+
+public final class Prime {
+	private static int number;
+	private static int maxValue;
+	private final static int MIN_VALUE = 3;
+	private final static int EVEN_DIVISOR = 2;
+
+	
+	
+	private Prime() {
+		throw new AssertionError("Utility class instantiation prohibited");
+	}
+	
+	public static void startGamePrime() {
+		System.out.println("Answer \'yes\' if given number is prime. Otherwise answer \'no\'.");
+	}
+	
+	public static String generateCorrectAnswer() {
+		number = (int) (Math.random()*100);
+		maxValue = (int) (Math.ceil(Math.sqrt(number)));
+		System.out.println("Question: " + number);
+		if(number == EVEN_DIVISOR) {
+			return "yes";
+		}
+		else if(number < EVEN_DIVISOR || number % EVEN_DIVISOR == 0) {
+			return "no";
+		}
+		else {
+			for(int i = MIN_VALUE; i < maxValue; i++) {
+				if(number % i == 0) {
+					return "no";
+				}
+			}
+			return "yes";
+		}
+	}
+	
+}