Design a Basic Calculator
Explore how to design a basic calculator in Ruby by defining a Calculator class with add and subtract methods. Understand class creation, method definition, object instantiation, and method invocation in Ruby's object-oriented programming.
Problem
Write a class named Calculator that contains two methods:
add: To add two numbersminus: To subtract two numbers
Expected output
We'll test the class by creating an object of the class, and invoking its methods on the object to verify that they return the ...