creating GCD game, small corrections Calculator and Even

Author: Antojkv

README.md

@@ -6,6 +6,8 @@
 [![Duplicated Lines (%)](https://sonarcloud.io/api/project_badges/measure?project=Antojkv_java-project-61&metric=duplicated_lines_density)](https://sonarcloud.io/summary/new_code?id=Antojkv_java-project-61)
 
 Аскинемы:
-Even: https://asciinema.org/a/C2DaZpopjiwCQOdQGr5ldJEa4
+"Even" https://asciinema.org/a/C2DaZpopjiwCQOdQGr5ldJEa4
 
-Calculator: https://asciinema.org/a/QIkWy2KinHzcdj0LULvdMOfM0
+"Calculator" https://asciinema.org/a/QIkWy2KinHzcdj0LULvdMOfM0
+
+"GCD" https://asciinema.org/a/anWD6GPnBTcWTBLCfvbMGZeV6

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

@@ -2,7 +2,7 @@
 
 import hexlet.code.games.Calculator;
 import hexlet.code.games.Even;
-
+import hexlet.code.games.Gcd;
 import java.util.Scanner;
 
 class App {
@@ -11,6 +11,7 @@ public static void main(String[] args) {
         System.out.println("1 - Greet");
         System.out.println("2 - Even");
         System.out.println("3 - Calculator");
+        System.out.println("4 - GCD");
         System.out.println("0 - Exit");
 
         Scanner scanner = new Scanner(System.in);
@@ -27,6 +28,9 @@ public static void main(String[] args) {
             case "3":
                 Calculator.startGame();
                 break;
+            case "4":
+                Gcd.startGame();
+                break;
             case "0":
                 System.out.println("Goodbye!");
                 break;

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

@@ -1,4 +1,5 @@
 package hexlet.code;
+
 import java.util.Scanner;
 
 public final class Cli {

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

@@ -1,7 +1,6 @@
 package hexlet.code.games;
 
 import hexlet.code.Engine;
-
 import java.security.SecureRandom;
 
 public class Calculator {

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

@@ -1,6 +1,6 @@
 package hexlet.code.games;
-import hexlet.code.Engine;
 
+import hexlet.code.Engine;
 import java.security.SecureRandom;
 
 public class Even {

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

@@ -0,0 +1,34 @@
+package hexlet.code.games;
+
+import hexlet.code.Engine;
+import java.security.SecureRandom;
+
+public class Gcd {
+    private static final String DESCRIPTION = "Find the greatest common divisor of given numbers.";
+
+    private static int isGCD(int a, int b) {
+        while (b != 0) {
+            int value = b;
+            b = a % b;
+            a = value;
+        }
+        return a;
+    }
+
+    public static void startGame() {
+        String[][] data = new String[Engine.getRoundsCount()][2];
+        SecureRandom random = new SecureRandom();
+
+        for (int i = 0; i < Engine.getRoundsCount(); i++) {
+            int number1 = random.nextInt(100) + 1;
+            int number2 = random.nextInt(100) + 1;
+            String question = number1 + " " + number2;
+            String correctAnswer = String.valueOf(isGCD(number1, number2));
+
+            data[i][0] = question;
+            data[i][1] = correctAnswer;
+        }
+        Engine.run(DESCRIPTION, data);
+    }
+
+}