Object Oriented Design and Programming

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Object Oriented Design and Programming

• Alan Goude
• Email a.goude_at_shu.ac.uk
• Room Sheaf 9323

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Unit delivery and assessment

• weeks 1 - 6
• 2hr lectures, 1hr labs
• weeks 7 -12
• 1hr lectures, 2hr labs
• 100 coursework assessment
• Two Assignments each contributing 50

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Topics -

• The object oriented approach OOA,OOD and OOP
• C Stream Input/Output
• Reference variables
• Classes
• Terminology
• Class members data and functions(methods)
• Class access public, private protected
• Separation of interface from implementation
• Constructor and destructors
• function overloading
• Dynamic memory allocation
• Object aggregation and composition
• UML notation for classes and class aggregation.

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Topics -

• Operator overloading
• Additional class features
• Friend functions
• Static members
• Inheritance
• Polymorphism
• Abstract classes, Virtual functions
• Templates, Standard Template Libray More UML
  (time permitting)

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Books

• Thinking in C by Bruce Eckel
• Vol.1 (basics) and Vol.2 (advance features)
• Assumes knowledge of C
• Free Electronic versions available from-
• http//www.mindview.net/Books
• C How to program by Deitel Deitel
• See info at http//www.deitel.com/
• Fourth Edition available Oct 2002
• Includes a version of Microsoft Visual C

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Other books and information sources

• Object-Oriented Analysis and Design with
  Applications by Grady Booch
• Unified Modelling Language User Guide by Grady
  Booch, Ivar Jacobson, James Rumbaugh
• UML Distilled A Brief Guide to the Standard
  Object Modeling Language (2nd Edition) by Martin
  Fowler, Kendall Scott
• My Web page - http//www.shu.ac.uk/schools/eng/tea
  ching/ag1
• Try a www.google.com search

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Object Oriented Design and Programming

• OOD Major proponents and developers
• Grady Booch, Ivar Jacobson, and James Rumbaugh
• Unified Modelling Language (UML)
• OOP Several OOP languages
• Smalltalk, Eiffel. Pure OOPL
• C, Java. Said to be object based OOPL

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Software Tools

• Object Oriented Programming (OOP)
• C
• Using Microsoft Visual Studio C compiler
• Object Oriented Design (OOD)
• UML (Unified Modelling Language)

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Object Model

• Key ideas
• Abstraction
• Encapsulation
• Modularity
• Hierarchy
• Minor elements of the object model
• Typing (language dependent data typing)
• Concurrency (OS dependent)
• Persistence

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Abstraction

• Helps to deal with complexity by focusing on
  certain features and suppressing others.
• Focus on interface (outside view)
• Separate behaviour from implementation

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Hierarchy

• A way of ordering abstractions
• Object hierarchical abstractions (HAS A or
  PART OF relationship)
• Interfaces and behaviours at each level
• Higher levels are more abstract

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Encapsulation

• Also known as information hiding
• Hides the details of the implementation
• Complementary to abstraction

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Abstraction, Encapsulation and Software Design

• Interface should be simple, providing the
  required behaviour.
• User is presented with high level abstract view.
  The detail of the implementation is hidden from
  the user.
• The designer may change the implementation
  keeping the interface the same.

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Modularity

• A common Divide and conquer approach
• Partitions a problem into sub-problems reducing
  complexity
• Modularity packages abstractions into discrete
  units
• In C classes are the basic modules providing
  encapsulation and abstraction

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Re-usability - Inheritance

• Class Hierarchies
• Derived class inherits properties and behaviour
  of a base class
• Allows code re-use.
• Derived classes can have
• additional properties and behaviour,
• or over-ride inherited behaviour.