Closed

Write some Software

This project was awarded to DemonDeveloper for $240 HKD.

Get free quotes for a project like this
Employer working
Project Budget
$80 - $240 HKD
Total Bids
7
Project Description

Your system design should conform to the Open Closed Principle so that your design should easily support new functions (e.g. change of name of security) and securities, for example, creation of BankNote record which is a subclass of Security.

You MUST apply the following design patterns for your new system

Command pattern to provide the “create”, “display”, “deposit”, “withdraw”, “undo”,

“redo” and “show undo/redo list” functions

Factory pattern or Abstract Factory Pattern to create different Command objects and Security objects (e.g. Bond object, Stock object, etc.)

Memento pattern to provide “Undo” and “Redo” functions

Awarded to:
Skills Required

Browse Related Skills

Related Projects

Other things people do on Freelancer

Related Articles

Latest Articles

Looking to make some money?

  • Set your budget and the timeframe
  • Outline your proposal
  • Get paid for your work

Hire Freelancers who also bid on this project

    • Forbes
    • The New York Times
    • Time
    • Wall Street Journal
    • Times Online