CS 392 Fall 2014

Exercise 01

Open up a Swift playground. Write Swift code for a super simple Bank:

• A bank has customers.
• A customer has name and an account.
• An account has account number, balance, and owner.
• Write the Customer, Account and Bank classes.
• Money can be deposited or withdrawn from accounts.
• Write some test code to create a few Customer, Account and Bank objects; add customers to the Bank, etc.
• Write description methods to print the account information of customers.

Objectives

• What’s the difference between let and var?
• How do you initialize an object? i.e. What’s the equivalent of a constructor in Swift?
• How do you refer to the current object? i.e. What’s the equivalent of this in Swift?
• What’s nil?
• What’s an option type? E.g. What is the difference between var account: Account? and var account: Account.
• How do you declare and use (i.e. iterate, access and modify) arrays?