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2015-06-21_pairing_objects.md

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Objective

  1. Understand the benefits of pair programming http://www.wikihow.com/Pair-Program
  2. More experiences with classes/objects

Pair Programming

http://www.wikihow.com/Pair-Program

In-class assignment:

BankAccount & Patron

####Create two classes: BankAccount and Patron

  • A BankAccount has a balance
  • A Patron has a name, an account, and his/her “pocket”.

####For now, our constraints will be:

  • A patron can only interact with one account ( 1 <=> 1 )
  • An account can interact with many patrons ( 1 <=> many)
  • We will deal with dollars only, no cents

Create a program that creates objects of these types and have them interact with each other.

Some suggested “interactions”:
  • An account should allow withdrawals and deposits
  • A patron can get from and put money in the account
  • Both should be able to show their current balance
Extra Credit:
  • Make it so a patron can interact with multiple accounts
  • Prevent the possibility of a Patron performing an overwithdrawl
  • Prevent the possibility of depositing more than you currently have in your pocket

Calculator

####Create one class: Calculator

####For now, our constraints will be:

  • Your calculator must be able to add, subtract, multiply, and divide
  • Your calculator should have an accumulator property to hold on to the current calculated value

Some suggested "interactions":

  • A calculator should be able to change its sign (+/-)
  • A calculator should be able to display the reciprocal value of the accumulator (1 / accumulator)
  • A calculator should be able to produce the squared value of the accumulator
Extra Credit:

Add a memory capability to your calculator:

  • Memory Clear // clear memory
  • Memory Store // set memory to accumulator
  • Memory Recall // set accumulator to memory