Tuesday, December 05, 2006

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Tuesday, December 05, 2006

• I hear and I forget,
• I see and I remember,
• I do and I understand
• -Chinese Proverb

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CS 192 / CMPE 191

• First course in programming using C

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CS192 / CMPE 191 Problem Solving and Computer
Programming

• Course Outline
• Course Website URL
• http//suraj.lums.edu.pk/cs192w06/
• Information about the course, office hours,
  contact information, announcements,
  lecture-slides, tutorials, source code
• \\indus\Common\cs192w06
• Overview of C

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• Make use of office hours.

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• Course builds on top of previous discussion.
• Dont hesitate to ask questions in class.

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• 5 minute rule!

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• What is a program?
• -

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• C programming language.
• High level language

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• What does the computer understand?

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• What do we need here?

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myprogram.c
include ltiostream.hgt int main()
coutltltHello\n
Type your C program into a text file It is
human-readable
myprogram.exe
machine-readable
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• Compiler
• Source code
• Object code

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• What happens when you start a program?

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• C
• Whats with the name?

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Some history

• In 1970s
• Developed by Dennis Ritchie of ATT Bell
  Laboratories
• It was first used for writing UNIX operating
  system
• Widely used in programmer community
• ANSI (American National Standards Institution)
  standard C (1983)

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Advantages of C

• Built-in power
• Efficiency
• Flexibility
• Library routines

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From C to C (1980 Bell Labs)

• Reason Increasing complexity of programs
• Bjarne Stroustrup of ATT Bell Laboratories
  developed C in 1980s.
• Most of C is a subset of C

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From C to C (1980 Bell Labs)

• High performance system software is constructed
  using C
• C Enhancement to C

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• Real programmers language
• Also it is

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• a lot of
• FUN!

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• Computer Science Fundamentals (CS 111)
• Object Oriented Programming (CS 292)
• Data Structures (CS 213)
• Operating Systems (CS 381)

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My assumptions

• Knowledge of
• A text editor
• Files
• Some experience of using Windows operating
  system.
• General knowledge of what computer hardware /
  software is.

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• Basic C Program Structure.
• Statements

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• Input / Output (I/O)

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• Compiler
• Linker

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• include ltiostream.hgt
• int main( )
• cout ltlt"Welcome to CS192/CMPE191"
• return 0

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• Include directives

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• iostream is the name of library that contains
  definition of routines that handle input and
  output.
• iostream.h is a file that contains information
  about this library

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Welcome to CS192/CMPE191
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Comments have two forms in C //Single line
comments /Multi-line comments/ / comments
ignored by compiler / // comments required by
some organizations!