very-simple-inheritance-for-beginners

Very Simple Inheritance for Beginners

There exists a preloaded abstract class named Operation:

abstract class Operation
{
  double result;
  abstract void execute(double variable1, double variable2);
}

Your job is to create 4 new classes which inherit the 'Operation' class. Within the class, create the proper execute method and save the mathematical operation to the proper result variable. The class names must be as follows:

• Add
• Subtract
• Multiply
• Divide