PY-OOP-Assignment1

Object Oriented Programming in Python - Assignment 1

1. Clone this repository (or copy the starter code into your IDE of choice).

2. Implement the Calculator class. The starter code is in calculator.py.

3. Write a ScientificCalculator class that is a subclass of Calculator.

   ScientificCalculator has all of the methods of Calculator, plus (at a minimum) these additional methods:

   • sqrt(a) -> returns the square root of a
   • squared(a) -> returns the value of a squared
   • exp(a, b) -> returns the value of a to the power of b

4. Write a BusinessCalculator class that is a subclass of Calculator.

   BusinessCalculator has all of the methods of Calculator, plus (at a minimum) these additional methods:

   • minus_percent(a, p) -> returns the value of a minus p percent of a
   • plus_tax(a) -> returns the value of a plus 7% tax

5. Write a GraphingCalculator class that is a subclass of both ScientificCalculator and BusinessCalculator.

   GraphingCalculator has all of the methods of ScientificCalculator and BusinessCalculator, plus the following methods:

   • graph(eq) -> returns a string of your choice (we're just pretending it's a graph)

   • repeat_last_answer() Override this method from the Calculator class and change it so that it returns a string instead of a float. Make sure the answer is contained within the string.

     ex. 'The last answer was 4'

     NOTE: The graph() method should not affect the value of the attribute self.last_answer

6. Run the test functions for each of your classes and make sure that all tests pass.

   Full test suite is located in calulator_tests.py.

   All Tests

   • python3 -m unittest calculator_tests

   Test a Specific Calculator

   • python -m unittest calculator_tests.BasicCalculatorTest
   • python -m unittest calculator_tests.BusinessCalculatorTest
   • python -m unittest calculator_tests.GraphingCalculatorTest
   • python -m unittest calculator_tests.ScientificCalculator

   Test a Specific Calculator Function

   • python -m unittest calculator_tests.BasicCalculatorTest.test_add