(강상문) StringCalculator 리뷰 요청드립니다.

src/main/java/calculator/CalculatorMain.java

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+package calculator;
+
+import calculator.controller.CalculatorController;
+import calculator.model.Operator;
+import calculator.view.InputView;
+import calculator.view.OutputView;
+
+
+public class CalculatorMain {
+    public static void main(String[] args) {
+        Operator operator = new Operator();
+        InputView inputView = new InputView();
+        OutputView outputView = new OutputView();
+
+        CalculatorController controller = new CalculatorController(operator, inputView, outputView);
+        controller.run();
+    }
+}

src/main/java/calculator/controller/CalculatorController.java

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+package calculator.controller;
+
+import calculator.model.Operator;
+import calculator.view.InputView;
+import calculator.view.OutputView;
+
+public class CalculatorController {
+    private final Operator operator;
+    private final InputView inputView;
+    private final OutputView outputView;
+
+    public CalculatorController(Operator operator, InputView inputView, OutputView outputView) {
+        this.operator = operator;
+        this.inputView = inputView;
+        this.outputView = outputView;
+    }
+
+    public void run() {
+        String[] values = inputView.formulaInput();
+        int result = operator.calculate(values);
+        outputView.resultOutput(result);
+    }
+}

src/main/java/calculator/model/Operations.java

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+package calculator.model;
+
+public class Operations {
+    public int addition(int a, int b) {
+        return a + b;
+    }
+
+    public int subtract(int a, int b) {
+        return a - b;
+    }
+
+    public int multiply(int a, int b) {
+        return a * b;
+    }
+
+    public int divide(int a, int b) {
+        if (b == 0) {
+            throw new ArithmeticException("0으로 나눌 수 없습니다.");
+        }
+        return a / b;
+    }
+}

src/main/java/calculator/model/Operator.java

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+package calculator.model;
+
+public class Operator {
+    private final Operations operations;
+
+    public Operator() {
+        this.operations = new Operations();
+    }
+
+    public int calculate(String[] values) {
+        int result = Integer.parseInt(values[0]);
+
+        for (int i = 1; i < values.length; i += 2) {
+            OperatorType operatorType = OperatorType.fromString(values[i]);
+            int nextNumber = Integer.parseInt(values[i + 1]);
+
+            switch (operatorType) {
+                case ADDITION:
+                    result = operations.addition(result, nextNumber);
+                    break;
+                case SUBTRACT:
+                    result = operations.subtract(result, nextNumber);
+                    break;
+                case MULTIPLY:
+                    result = operations.multiply(result, nextNumber);
+                    break;
+                case DIVIDE:
+                    result = operations.divide(result, nextNumber);
+                    break;
+            }
+        }
+        return result;
+    }
+}

src/main/java/calculator/model/OperatorType.java

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+package calculator.model;
+
+public enum OperatorType {
+    ADDITION, SUBTRACT, MULTIPLY, DIVIDE;
+
+    public static OperatorType fromString(String symbol) {
+        switch (symbol) {
+            case "+":
+                return ADDITION;
+            case "-":
+                return SUBTRACT;
+            case "*":
+                return MULTIPLY;
+            case "/":
+                return DIVIDE;
+            default:
+                throw new IllegalArgumentException("잘못된 연산자입니다.");
+        }
+    }
+}

src/main/java/calculator/view/InputView.java

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+package calculator.view;
+
+import java.util.Scanner;
+
+public class InputView {
+    public String[] formulaInput() {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("수식을 입력하세요 : ");
+        return scanner.nextLine().split(" ");
+    }
+}

src/main/java/calculator/view/OutputView.java

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+package calculator.view;
+
+public class OutputView {
+
+    public void resultOutput(int result) {
+        System.out.print("결과 : " + result);
+    }
+}