Write a few lines about the importance of ‘C’ (or) history of ‘C’?

Ø  C is simple, powerful, flexible, portable, structure oriented, high level & machine independent language. Ø  Before introducing ‘C’ here are may languages

Evolution of C:-

ALGOL :- Ø  It was developed by international group in 1960. It is a type less system s/w. Ø  It is the root of all modern languages.

BCPL :-

Ø  Basic combined programming language

Ø  It was developed from ALGOL in 1967 by martin Richards

Ø  It is a typeles system s/w

Ø  It is used primarily for writing system s/w.

B:-

Ø  It was developed from BCPL in 1970 by Ken Thomson

Ø  It was type Len s/w

Ø  B is a language adding many features to BCPL. It is very useful to create early vesion of UNIX so. At bell laboratories.

Traditional ‘C’:-

Ø  Developed from ALGOL, BCPL, B, It in was developed by Dennis Ritchie in 1972 at bell laboratories

Ø  It is a middle level language

Ø  It is a typing s/w

Ø  ‘C’ added many concepts like data types & other powerful features.

K & RC:-

Ø  It was developed in the year 1978 by Dennis Ritchie & Kernighan.

ANSI ‘C’:-

Ø  It was developed by ANSI committee in 1989.

ANSI ISO:-

Ø  It was developed by Iso committee in 1990. 1960 ALGOL  International group 1967 BCPL Martin Richards 1970 B Ken Thompson 1972 Traditional C Dennis Ritchic 1978 K & RC Kernighan & Ritchc 1989 ANSI C ANSI committee 1990 ANSI/ISO C ISO committee 1999 C99 Standardization committee Important (or) features of C language: ® C is a Robust language whose rich set of built-in functions  & operators can be used to write any complex program ® The c complier combines the capabilities of an assembly language with the features of a high-level language & it is well suited for write both system software as well as business applications. ® Programs written in C are efficient & fast, this is due to its variety of data types & powerful operators   ® There are only 32 key words in ANSI C. ® C is highly portable.  This means that C programs written for one computer can be run on another with little or no modifications ® C language is well suited for structured programming, thus requiring the user to think  about the problem in terms of function  modules (or) blocks This modular structure makes program debugging, testing & maintenance easier. ® Another important feature of C is its ability to extend itself. A c program is basically a collection of functions that are supported by the C library. We can continuously add our own functions to c library. ® C allows dynamic allocation of memory. ® It is case sensitive language.