Friday, August 24, 2018

Introduction to C Programming ?

C is a powerful, portable and elegantly structured programming language. It combines the features of a high-level language with the elements of an assembler and, therefore, it is suitable for writing both system software and application packages.

 To write programs in C, we need to understand various terms such as characters, identifiers, keyword, constants, variables, data types, programming constructs, etc. All this shall from the basis of this chapter along with actual programs written in C language.

C language is structured programming  language developed by Dennis Ritchie in 1972 at Bell Laboratories (AT and T bell Labs). It is the machine independent language that enables the programmer to focus more on programming aspects. C language is basically derived from ALGOL which was widely used in European countries. The introduction of ALGOL during 1960's have created the way for development of structured programming concepts.

The C language was published by a book written by W. Kernigham and Dennis Ritchie in 1983. In 1983, a separate standard for C was proposal by ANSI ( American National Standards Institute ) which was later approved in 1989. This version of C language standard is often known as C89. The ISO (International Standard Organisation) in 1990 adopted ANSI. Five years later (i.e., in 1995), few changes were made to the standard, this resulted in a new version popularly known as C95. In 1999, C95 was again upgraded with much more significant changes resulting in c99 standard. The c99 is the latest standard available.




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