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Introduction of C Programming Language

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Introduction of C Programming Language

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  1. Introduction of C

  2. What is C? • Invented by Dennis Ritchie – AT&T Bell Labs 1972 • Widely used today Extends to newer system architectures Efficiency/performance Low-level access

  3. C Features • Few keywords • Structures, unions, compound data types.. • Pointers, arrays… • Standard library • Compiles to native code • Macro preprocessor

  4. C Evolution • 1972 – C Invention • 1978 - 1st specification published • 1989 - C89 standard ( ANSI C or standard C ) • 1990 - ANSI C adopted by ISO, AKA C90 • 1999 - C99 standard Not completely implemented in many compilers • 2007 - Work on new standard C1X announced • We will focus on ANSI/ISO C ( C89/C90 )

  5. C Usage • Systems Programming Operating systems • Microcontrollers • Embedded processors • DSP processors

  6. Similarities of C to java /* Comments */ Variable declarations if / else statements for loops while loops function definitions (like methods) Main function starts program

  7. Differences between C and Java • C does not have objects There are “struct” ures • C is a functional programming language • C allows pointer manipulation • Input / Output with C Output with printf function Input with scanf function

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