src/main/java/com/example/LoopTestApplication.java

@@ -1 +1,16 @@
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+package com.example;
+
+import com.example.util.AddFunction;
+import com.example.util.CalcFunction;
+import com.example.util.SubtractFunction;
+
+public class LoopTestApplication {
+
+    public static void main(String[] args) {
+        System.out.println("============== Calculator =============");
+        CalcFunction add = new AddFunction();
+        System.out.println("ADDITION: " + add.calc(2, 5, 6));
+        CalcFunction subtract = new SubtractFunction();
+        System.out.println("SUBTRACTION: " + subtract.calc(2, 5, 6));
+    }
+}