Jv lambda calc solution vk

src/main/java/core/basesyntax/Calculating.java

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+package core.basesyntax;
+
+public interface Calculating {
+    public double calculate(double a, double b, char operation);
+}

src/main/java/core/basesyntax/Calculator.java

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+package core.basesyntax;
+
+import core.basesyntax.exceptions.OperatorException;
+import core.basesyntax.exceptions.ValueException;
+
+public class Calculator implements Calculating {
+
+    @Override
+    public double calculate(double a, double b, char operation) {
+        double result = 0;
+        switch (operation) {
+            case '+':
+                result = a + b;
+                break;
+            case '-':
+                result = a - b;
+                break;
+            case '*':
+                result = a * b;
+                break;
+            case '/':
+                if (b == 0.00) {
+                    throw new ValueException("Division by zero");
+                }
+                result = a / b;
+                break;
+            case '^':
+                if (a == 0 && b < 0) {
+                    throw new ValueException("Zero cannot powered to negative value");
+                }
+                result = Math.pow(a, b);
+                break;
+            default:
+                throw new OperatorException("Wrong operator");
+        }
+        return result;
+    }
+}

src/main/java/core/basesyntax/exceptions/OperatorException.java

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+package core.basesyntax.exceptions;
+
+public class OperatorException extends RuntimeException {
+    public OperatorException(String message) {
+        super(message);
+    }
+}

src/main/java/core/basesyntax/exceptions/ValueException.java

@@ -0,0 +1,7 @@
+package core.basesyntax.exceptions;
+
+public class ValueException extends RuntimeException {
+    public ValueException(String message) {
+        super(message);
+    }
+}