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src/main/java/baseball/Application.java

@@ -1,7 +1,97 @@
 package baseball;
 
+import camp.nextstep.edu.missionutils.Console;
+
+import java.util.*;
+
+// M model -> 계산 로직 데이터
+// v View -> 입력 출력
+// C Controller -> 모델 뷰를 합쳐서 관리함
+
 public class Application {
+
     public static void main(String[] args) {
         // TODO: 프로그램 구현
+        while (true) {
+            //게임 시작
+            System.out.print("숫자 야구 게임을 시작합니다.");
+            startGame();
+
+            System.out.println("게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.");
+            int continueAnswer = Integer.parseInt(Console.readLine());
+            if (continueAnswer == 1) continue;
+            else if (continueAnswer == 2) {
+                break;
+            }
+        }
+    }
+
+    private static void startGame() {
+        while (true) {
+            //정답 배열 생성
+            List<Integer> answerNumbers = makeAnswer();
+
+            //볼, 스트라이크 판별
+            while (true) {
+                //숫자 입력받고 list에 저장
+                List<Integer> userNumbers = getNumbers();
+                Result result = verifyNumbers(answerNumbers, userNumbers);
+
+                if (result.hasBall()) {
+                    System.out.println(result.ball + "볼");
+                }
+                if (result.strike == 1 || result.strike == 2) {
+                    System.out.println(result.strike + "스트라이크");
+                } else if (result.isNothing()) {
+                    System.out.println("낫싱");
+                }
+                if (result.strike == 3) {
+                    System.out.println("3개의 숫자를 모두 맞히셨습니다! 게임 종료");
+                    break;
+                } else continue;
+            }
+        }
+    }
+
+    private static List<Integer> makeAnswer() {
+        List<Integer> answerNumbers = new ArrayList<>();
+        Random random = new Random();
+
+        while(answerNumbers.size() < 3) {
+            int number = random.nextInt(9) + 1; //1~9
+            if (!answerNumbers.contains(number)) {
+                answerNumbers.add(number);
+            }
+        }
+
+        return answerNumbers;
+    }
+
+    private static Result verifyNumbers(List<Integer> answerNumbers, List<Integer> userNumbers) {
+        int ball = 0;
+        int strike = 0;
+
+        for (int i = 0; i < userNumbers.size(); i++) {
+            if (answerNumbers.contains(userNumbers.get(i))) {
+                if (answerNumbers.get(i) == userNumbers.get(i)) {
+                    strike++;
+                }
+                else ball++;
+            }
+        }
+        return new Result(strike, ball);
+    }
+
+    private static List<Integer> getNumbers() {
+        List<Integer> userInput = new ArrayList<>();
+
+        System.out.print("\n숫자를 입력해주세요: ");
+        String input = Console.readLine();
+
+        for (int i = 0; i < input.length(); i++) {
+            userInput.add(input.charAt(i) - '0');
+        }
+
+        return userInput;
     }
-}
+}

src/main/java/baseball/Result.java

@@ -0,0 +1,19 @@
+package baseball;
+
+public class Result {
+    public int strike;
+    public int ball;
+
+    public Result(int strike, int ball) {
+        this.strike = strike;
+        this.ball = ball;
+    }
+
+    public boolean hasBall() {
+        return ball > 0;
+    }
+
+    public boolean isNothing() {
+        return ball == 0 && strike == 0;
+    }
+}