red.is

README.md

@@ -5,3 +5,15 @@
 
 ## 과제 제출 과정
 * [과제 제출 방법](https://github.com/next-step/nextstep-docs/tree/master/ent-precourse)
+
+## 구현할 기능 목록
+* 유저에게 메세지를 출력하는 기능
+    * 유저에게 인풋을 요구하는 메세지
+    * 결과 메세지
+* 유저의 인풋을 저장하는 기능
+* 유저의 인풋에 대한 결과를 확인하는 기능
+* 서로 다른 3개의 digit으로 이루어진 랜덤한 세자리 숫자 선정하는 기능
+
+## 구현하면 좋을 기능
+* input의 validity check 기능
+* 더 많은 Test들

src/main/java/baseball/Console.java

@@ -0,0 +1,30 @@
+package baseball;
+import java.util.Scanner;
+
+public class Console {
+    public String getInput() {
+        System.out.print("숫자를 입력해주세요 : ");
+        Scanner scanner = new Scanner(System.in);
+        return scanner.next();
+    }
+
+    public void printResult(int strike, int ball) {
+        if (strike + ball == 0) {
+            System.out.print("낫씽");
+        }
+        if (strike != 0) {
+            System.out.print(strike + " 스트라이크 ");
+        }
+        if (ball != 0) {
+            System.out.print(ball + " 볼");
+        }
+        System.out.println();
+    }
+
+    public int endGame() {
+        System.out.println("3개의 숫자를 모두 맞히셨습니다! 게임 종료");
+        System.out.println("게임을 새로 시작하시려면 1, 종료하려면 2를 입력하세요.");
+        Scanner scanner = new Scanner(System.in);
+        return scanner.nextInt();
+    }
+}

src/main/java/baseball/Controller.java

@@ -0,0 +1,8 @@
+package baseball;
+
+public class Controller {
+    public static void main(String[] args) {
+        Engine engine = new Engine();
+        engine.playBall();
+    }
+}

src/main/java/baseball/Engine.java

@@ -0,0 +1,31 @@
+package baseball;
+
+public class Engine {
+    public void playBall() {
+        int flag = 1;
+        while (flag == 1) {
+            flag = match();
+        }
+    }
+
+    private int match() {
+        Console console = new Console();
+        Pitcher pitcher = new Pitcher();
+        String target = pitcher.generateNumber();
+        batting(console, target);
+        return console.endGame();
+    }
+
+    private void batting(Console console, String target) {
+        int strike = 0;
+        int ball;
+        Referee referee = new Referee();
+        while (strike != 3) {
+            String input = console.getInput();
+            int[] result = referee.judge(target, input);
+            strike = result[0];
+            ball = result[1];
+            console.printResult(strike, ball);
+        }
+    }
+}

src/main/java/baseball/Pitcher.java

@@ -0,0 +1,18 @@
+package baseball;
+import java.util.Random;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+public class Pitcher {
+    public String generateNumber() {
+        Random random = new Random();
+        ArrayList<Integer> digits = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9));
+        StringBuilder number = new StringBuilder();
+        for (int i = 0; i < 3; i++) {
+            int randomIndex = random.nextInt(digits.size());
+            number.append(digits.get(randomIndex));
+            digits.remove(randomIndex);
+        }
+        return number.toString();
+    }
+}

src/main/java/baseball/Referee.java

@@ -0,0 +1,45 @@
+package baseball;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Referee {
+    public int[] judge(String target, String input) {
+        return new int[] {countStrike(convert(target), convert(input)), countBall(convert(target), convert(input))};
+    }
+
+    private List<Integer> convert(String string) {
+        List<Integer> career = new ArrayList<>();
+        for(String number: string.split("")) {
+            career.add(Integer.parseInt(number));
+        }
+        return career;
+    }
+
+    private int countBall(List<Integer> target, List<Integer> input) {
+        int ball = 0;
+        if (target.get(0) == input.get(1) || target.get(0) == input.get(2)) {
+            ball++;
+        }
+        if (target.get(1) == input.get(0) || target.get(1) == input.get(2)) {
+            ball++;
+        }
+        if (target.get(2) == input.get(0) || target.get(2) == input.get(1)) {
+            ball++;
+        }
+        return ball;
+    }
+
+    private int countStrike(List<Integer> target, List<Integer> input) {
+        int strike = 0;
+        if (target.get(0) == input.get(0)) {
+            strike ++;
+        }
+        if (target.get(1) == input.get(1)) {
+            strike ++;
+        }
+        if (target.get(2) == input.get(2)) {
+            strike ++;
+        }
+        return strike;
+    }
+}

src/test/java/baseball/PitcherTest.java

@@ -0,0 +1,22 @@
+package baseball;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.BeforeEach;
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+public class PitcherTest {
+    Pitcher pitcher;
+
+    @BeforeEach
+    void setUp() {
+        pitcher = new Pitcher();
+    }
+
+    @Test
+    @DisplayName("랜덤 세자리 숫자 생성 확인")
+    void lengthTest() {
+        String number = pitcher.generateNumber();
+        assertThat(3).isEqualTo(number.length());
+    }
+}

src/test/java/baseball/RefereeTest.java

@@ -0,0 +1,21 @@
+package baseball;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.BeforeEach;
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+public class RefereeTest {
+    Referee referee;
+
+    @BeforeEach
+    void setUp() {
+        referee = new Referee();
+    }
+
+    @Test
+    @DisplayName("스트라이크 볼 판단 확인")
+    void judgeTest() {
+        assertThat(new int[] {2, 0}).isEqualTo(referee.judge("123", "125"));
+    }
+}