[장정우_BackEnd] 2주차 과제 제출합니다.

src/main/java/racingcar/Application.java

@@ -1,7 +1,158 @@
 package racingcar;
 
+import camp.nextstep.edu.missionutils.Randoms;
+import camp.nextstep.edu.missionutils.Console;
+import java.util.ArrayList;
+import java.util.List;
+
 public class Application {
+
     public static void main(String[] args) {
-        // TODO: 프로그램 구현
+        CarRacingGame carRacingGame = new CarRacingGame(new UserInput(), new Race());
+        carRacingGame.start();
+    }
+}
+
+class CarRacingGame {
+    private final UserInput userInput;
+    private final Race race;
+
+    public CarRacingGame(UserInput userInput, Race race) {
+        this.userInput = userInput;
+        this.race = race;
+    }
+
+    public void start() {
+        String[] names = userInput.getCarNames();
+        int attempts = userInput.getAttempts();
+
+        List<Car> cars = createCars(names);
+        race.run(cars, attempts);
+        race.printWinner(cars);
+    }
+
+    private List<Car> createCars(String[] names) {
+        List<Car> cars = new ArrayList<>();
+        for (String name : names) {
+            cars.add(new Car(name));
+        }
+        return cars;
+    }
+}
+
+class Car {
+    private final String name;
+    private int position = 0;
+
+    public Car(String name) {
+        this.name = name;
+    }
+
+    public void move() {
+        int randomValue = Randoms.pickNumberInRange(0, 9);
+        if (randomValue >= 4) {
+            position++;
+        }
+    }
+
+    public String getPositionDisplay() {
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < position; i++) {
+            sb.append("-");
+        }
+        return sb.toString();
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getPosition() {
+        return position;
+    }
+}
+
+class Race {
+
+    public void run(List<Car> cars, int attempts) {
+        for (int i = 0; i < attempts; i++) {
+            moveAllCars(cars);
+            printCarsPosition(cars);
+        }
+    }
+
+    private void moveAllCars(List<Car> cars) {
+        for (Car car : cars) {
+            car.move();
+        }
+    }
+
+    private void printCarsPosition(List<Car> cars) {
+        for (Car car : cars) {
+            System.out.println(car.getName() + " : " + car.getPositionDisplay());
+        }
+        System.out.println();
+    }
+
+    public void printWinner(List<Car> cars) {
+        int maxPosition = getMaxPosition(cars);
+        List<String> winners = getWinners(cars, maxPosition);
+        System.out.println("최종 우승자 : " + String.join(", ", winners));
+    }
+
+    private int getMaxPosition(List<Car> cars) {
+        int maxPosition = 0;
+        for (Car car : cars) {
+            if (car.getPosition() > maxPosition) {
+                maxPosition = car.getPosition();
+            }
+        }
+        return maxPosition;
+    }
+
+    private List<String> getWinners(List<Car> cars, int maxPosition) {
+        List<String> winners = new ArrayList<>();
+        for (Car car : cars) {
+            if (car.getPosition() == maxPosition) {
+                winners.add(car.getName());
+            }
+        }
+        return winners;
+    }
+}
+
+class UserInput {
+
+    public String[] getCarNames() {
+        String inputNames = promptCarNames();
+        String[] names = inputNames.split(",");
+        validateCarNames(names);
+        return names;
+    }
+
+    private String promptCarNames() {
+        System.out.println("경주할 자동차 이름을 입력하세요.(이름은 쉼표(,) 기준으로 구분)");
+        return Console.readLine();
+    }
+
+    private void validateCarNames(String[] names) {
+        for (String name : names) {
+            if (name.length() > 5) {
+                throw new IllegalArgumentException("자동차 이름은 5자 이하만 가능합니다.");
+            }
+        }
+    }
+
+    public int getAttempts() {
+        return promptAttempts();
+    }
+
+    private int promptAttempts() {
+        System.out.println("시도할 회수는 몇회인가요?");
+        int attempts = Integer.parseInt(Console.readLine());
+        if (attempts <= 0) {
+            throw new IllegalArgumentException("시도 횟수는 1회 이상이어야 합니다.");
+        }
+        return attempts;
     }
 }

src/main/java/racingcar/raicingcar.java

@@ -0,0 +1,4 @@
+package racingcar;
+
+public class raicingcar {
+}