11. Objects

• Feel free to use your laptop

• You are strongly encourage to work with others

  • When you get stuck, ask those sitting around you for help

  • Get used to working together in the labs

  • Peer teaching and peer learning has been empirically shown to be very effective

11.1. Pre Lab Exercises

• Have a working implementation of the Circle class from lecture

  • You can obtain the source code from here

  • It will provide a nice template for all the classes you will make in this lab

11.2. Before Kattis

1. Create a Square class

   • Single attribute side_length

   • The constructor will take a parameter for specifying the size

   • Method for calculating area()

   • Method for calculating the perimeter()

   • Make instances of the class and write assert tests to verify correctness

2. Create a Rectangle class

   • Attribute for length

   • Another attribute for width

   • The constructor will take two parameters for specifying the size

   • Method for calculating area()

   • Method for calculating the perimeter()

   • Make instances of the class and write assert tests to verify correctness

3. Create a RectangularPrism class

   • Attributes for length, width, and height

   • The constructor will take three parameters for specifying the size

   • A method for calculating surface_area()

   • A method for calculating volume()

   • Make instances of the class and write assert tests to verify correctness

4. Create a Person class

   • Attribute for first_name

   • Attribute for last_name

   • Attribute for email_address

   • The constructor will take three parameters for specifying the values of the attributes

   • A method returning a string of their full_name() — e.g. Bob Smith

   • Make instances of the class and write assert tests to verify correctness

5. Create unittest classes for each of the above classes

   • Write tests for each of the methods in each class

   • Be sure to reference the unittest topic

   • You may find the Circle class’ unittests helpful

     • Be sure to remove the from src.circle import Circle line

   • Run the tests with unittest.main(argv=[''], verbosity=2, exit=False)

   • Ensure all tests pass

11.3. Kattis Problems

• You should be using a scrap piece of paper to work out the ideas for the following problems

  • The problems you are to solve are getting too complex to try to solve by just coding

  • Trying to solve problems by just typing away will not yield success

1. https://open.kattis.com/problems/everywhere

2. https://open.kattis.com/problems/babelfish

3. https://open.kattis.com/problems/oddmanout

4. https://open.kattis.com/problems/securedoors

5. https://open.kattis.com/problems/modulo