add folder for games

Author: Aleksandr Pronichev

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

@@ -0,0 +1,8 @@
+package hexlet.code;
+
+public class Calc {
+    public static void gameCalc() {
+        String userName = Engine.greeting();
+
+    }
+}

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

@@ -0,0 +1,49 @@
+package hexlet.code;
+
+import java.util.Scanner;
+
+public class Even {
+    public static void gameEven() {
+        String userName = Engine.greeting();
+        System.out.println("Answer 'yes' if the number is even, otherwise answer 'no'.");
+
+        Scanner scanner = new Scanner(System.in);
+
+        for (int i = 0; i < 3; i++) {
+            int guessedNumber = (int) (Math.random() * 100);
+            System.out.println("Question: " + guessedNumber);
+            System.out.print("Your answer: ");
+            String answer = scanner.next();
+
+            if (!answer.equals("yes") && !answer.equals("no")) {
+                System.out.println("'" + answer + "'" + "is wrong answer. Answer should be 'yes' or 'no'");
+                break;
+            }
+
+            if (guessedNumber % 2 == 0) {
+                if (answer.equals("yes")) {
+                    System.out.println("Correct!");
+                } else {
+                    System.out.println("'no' is wrong answer ;(. Correct answer was 'yes'.\n"
+                            + "Let's try again, " + userName + "!");
+                    break;
+                }
+            } else {
+                if (answer.equals("no")) {
+                    System.out.println("Correct!");
+                } else {
+                    System.out.println("'yes' is wrong answer ;(. Correct answer was 'no'.\n"
+                            + "Let's try again, " + userName + "!");
+                    break;
+                }
+            }
+
+            if (i == 2) {
+                System.out.println("Congratulations, " + userName + "!");
+                break;
+            }
+        }
+        scanner.close();
+    }
+
+}