added game №5 progression

Author: DashProsh

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

@@ -12,6 +12,7 @@ public static void main(String[] args) {
                 2 - Even
                 3 - Calc
                 4 - GCD
+                5 - Progression
                 0 - Exit
                 Your choice:""");
 
@@ -28,6 +29,8 @@ public static void main(String[] args) {
 
             case "4" -> Games.gcd();
 
+            case "5" -> Games.progression();
+
             default -> System.out.println("Invalid choice, please try again.");
 
         }

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

@@ -1,11 +1,13 @@
 package hexlet.code;
 
+
 import java.util.Scanner;
 
 public class Engine {
     public static final int rounds = 3;
 
     public static void skeletonOfGames(String mainGameQuestion, String[] question, String[] correctAnswer) {
+
         Scanner scanner = new Scanner(System.in);
         System.out.println("""
                 Welcome to the Brain Games!
@@ -35,12 +37,3 @@ public static void skeletonOfGames(String mainGameQuestion, String[] question, S
         System.out.println("Congratulations, " + name + "!");
     }
 }
-
-
-
-
-//import java.util.Arrays;
-//import java.util.List;
-//import java.util.Scanner;
-//import java.util.Random;
-//import hexlet.code.Engine;

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

@@ -63,6 +63,7 @@ public static int calc() {
     }
 
 
+
     // Game №4 GCD
     public static int gcd() {
         Random random = new Random();
@@ -88,6 +89,36 @@ public static int gcd() {
         Engine.skeletonOfGames(mainGameQuestion, question, correctAnswer);
         return 0;
     }
-}
 
 
+
+    // Game №5 Progression
+    public static int progression() {
+        Random random = new Random();
+        String mainGameQuestion = "What number is missing in the progression?";
+
+        String[] question = new String[Engine.rounds];
+        String[] correctAnswer = new String[Engine.rounds];
+
+        for (var i = 0; i < Engine.rounds; i++) {
+
+            int[] array = new int[10];
+
+            int step = random.nextInt(9) + 1;
+            int start = random.nextInt(14) + 1;
+
+            for (int j = 0; j < 10; j++) {
+                array[j] = start + j * step;
+            }
+
+            int indexFromArray = random.nextInt(9);
+            String arrayToString = Arrays.toString(array);
+            String hideNumber = arrayToString.replaceAll(String.valueOf(array[indexFromArray]), "..");
+            question[i] = hideNumber;
+            correctAnswer[i] = String.valueOf(array[indexFromArray]);
+
+        }
+        Engine.skeletonOfGames(mainGameQuestion, question, correctAnswer);
+        return 0;
+    }
+}