Kate Gregory with material from Deitel and Deitel

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CO 204

• Object Oriented Programming
• 2003
• Trent University
• Kate Gregory

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Agenda

• About Me
• Administrivia
• Overview
• Intro to C

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Class Times

• 300 500 Lecture
• Usually break around 400 for 10-15 minutes
• 500 550 Tutorial
• Less formal, more one-on-one
• Save non-urgent questions for this hour

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Web Site

• www.gregcons.com/204
• Lecture PowerPoints
• Usually available before class
• Companion Word and Excel documents
• Assignments, handouts
• Please email me if you need HTML versions of
  these
• Announcements of test dates and other information
  of interest
• Reminder of my phone numbers and email

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Administrivia

• Text Harvey M. Deitel, Paul J. Deitel. C How
  to Program, 3rd Edition.
• Office Hours Before and after class and by
  appointment downtown
• Web Support www.gregcons.com/204
• kate_at_gregcons.com anytime
• Grading Scheme 7 Labs 35, Midterm 25,
  Final 40

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Course Schedule
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Labs and Assignments

• 7 Labs, each worth 5
• Typically each will be drawn from end-of-chapter
  exercises in text
• One lab may cover several weeks of material
• Each is due one week after it is handed out
• Late penalties HURT

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Marking Labs

• A working program does not mean a perfect mark
• Comment your code meaningfully
• Make sure your code solves the problem you were
  given
• Hand in whatever extras are requested such as
  problem statement, sample output
• Some marks are allotted for test techniques

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Overview Topics Covered

• Introduction to C
• Control Structures
• Functions
• Arrays
• Pointers
• Strings
• Classes
• Data Abstraction

• Operator Overloading
• Inheritance
• Virtual Functions
• Polymorphism
• Stream IO
• Templates
• Exceptions
• File IO

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Design vs Coding

• You will learn how to code a feature, such as
  inheritance
• You will not learn how to decide whether a system
  should use the feature
• Design is CO 362
• Most paid programmers start as coders and are
  allowed to design later
• You will learn the benefits and advantages of
  these language features.

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History C

• Evolved by Ritchie from two previous programming
  languages, BCPL and B
• Used to develop UNIX
• Used to write modern operating systems
• Hardware independent (portable)
• By late 1970's C had evolved to "Traditional C"
• Standardization
• Many slight variations of C existed, and were
  incompatible
• Committee formed to create a "unambiguous,
  machine-independent" definition
• Standard created in 1989, updated in 1999

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History C

• Superset of C developed by Bjarne Stroustrup at
  Bell Labs
• "Spruces up" C, and provides object-oriented
  capabilities
• Object-oriented design very powerful
• 10 to 100 fold increase in productivity
• Dominant language in industry and academia

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Files in C

• foo.cpp source code
• foo.h header file
• Typically .h files are included into source files
• Source files are each compiled into obj files
• Several obj files are linked into an exe
• Sometimes a lib file is linked in also
• The exe can be executed, or run
• Extensions and naming conventions may vary

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Important times

• Compile Time
• Link Time
• Run Time
• When is something known?
• When does an error happen?
• When is a decision made?

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C Gotchas

• Case Sensitive if and IF are different
• You must declare variables
• You must initialize variables
• Ignores line breaks you must mark ends of lines
  with
• Compiler does not read indents
• Brace brackets are sometimes optional use
  them anyway

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Strongly Typed

• All variables in C have a type
• int,char, float, etc
• int i 3.4
• float f Hello
• The compiler is your friend

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The main() function

• This is what the operating system runs
• // Everybodys first program
• include ltiostream.hgt
• int main()
• cout ltlt "Hello, Trent!"
• return 0

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Learning Already

• Function
• Indenting styles
• include
• cout ltlt
• return
• Historical allusions Unix, foo, Hello World

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For Next class

• Read Chapters 1, 2, and 3 of text
• Ensure you know how to use the C compiler in
  the lab or on your own computer (the text comes
  with a copy of Visual C.)