CS304: Lecture 1

1
CS304 Lecture 1

• Basics of C Programming
• Deitel, Ch. 1-5
• http//www.cis.uab.edu/cs304

2
Overview

• Who am I?
• Who are you?
• What is this course?

3
C vs. Java

• C extension of C
• Provides capabilities for object-oriented
  programming
• Hybrid language
• C-like style
• Can have global functions or data. Java cant
• OO style
• Fast
• Originally designed for OS development, can be 20
  times faster than Java.
• Complex
• Preprocessor Appendix F (pp. 1272)
• Macro, templates, operator overloading
• And more
• Google "Comparing C and Java!

4
Typical C Environment
5
Hello World!

• include ltiostreamgt // preprocessor directive
• using stdcout // scope operator
• int main()
• cout ltlt "Hello, world!\n" // stream operator
• return 0

6
Structure of a C Program

• Comments
• Single-line comment
• Begin with //
• Preprocessor directives
• Processed by preprocessor before compiling
• Begin with

7
Structure of a C Program

• Standard output stream object
• stdcout
• Connected to screen
• ltlt
• Stream insertion operator
• Value to right (right operand) inserted into
  output stream
• Input stream object
• gtgt (stream extraction operator)
• Used with stdcin
• Waits for user to input value, then press Enter
  (Return) key
• Stores value in variable to right of operator
• Converts value to variable data type

8
Structure of a C Program

• Namespace
• std specifies using name that belongs to
  namespace std
• std removed through use of using statements
• using statements
• Eliminate use of std prefix
• Write cout instead of stdcout