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Ø C is simple, powerful, flexible,
portable, structure oriented, ligh level & machine independent language.
Ø Before introducing ‘C’ here are may
languages
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Evolution of C:-
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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
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BCPL :-
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Ø
Basic
combined programming language
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Ø
It
was developed from ALGOL in 1967 by martin Richards
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Ø
It
is a typeles system s/w
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Ø
It
is used primarily for writing system s/w
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B:-
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Ø
It
was developed from BCPL in 1970 by KenThomason
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Ø
It
was type Len s/w
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Ø
B
is a language adding many features to BCPL. It is very useful to create early
vesion of UNIX so. At bell laboratories
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Traditional ‘C’:-
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Ø
Developed
from ALGOL, BCPL, B, It in was developed by Dennis Ritchie in 1972 at bell
laboratories
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Ø
It
is a middle level language
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Ø
It
is a typing s/w
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Ø
‘C’
added many concepts like data types & other powerful features
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K & RC:-
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Ø
It
was developed in the year 1978 by Dennis Ritclie & Kerningham
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ANSI ‘C’:-
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Ø
It
was developed by ANSI committee in 1989
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ANSI ISO:-
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Ø
It
was developed by Iso committee in 1990
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Ø
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Ø
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1960 ®
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ALGOL
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®
International group
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1967
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BCPL
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Martin
Richards
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1970
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13
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Ken Thompson
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1972
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Traditional
C
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Dennis Ritchic
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1978
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K &
RC
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Kernighan
& Ritchc
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1989
|
ANSL C
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ANSI
committee
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1990
|
ANSI/ISO
C
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ISO
committee
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1999
|
C99
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Standardization
committee
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Important
(or) features of C language
|
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®
|
C is a
Robus + language whose rich set of bwill—in function & operators can be used to write any
complex program
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®
|
The c
complie combines the capabilities of an assembly language with the features
of a high-level language & it in well suited for write both system
between of business packages
|
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®
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Programs
written in C are efficient & fast this is due to its variety of df = &
powerful operators
|
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®
|
There
are only 32 key wordsin ANSCI C.
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®
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C is
highly portable. This mean that C
programs written for one computer can be run on another with little or no
modifications
|
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®
|
C
language is well suited for structured programming, thus requiring the user
to think of er problem in terms of function modules (or) blocks
This modular structure makes
program debugging, testing & maintenance easier
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®
|
Another
important feature of C is its ability to extend itself. A c program is
basically a collection of function that
are supported by the C library.
We can continuously add out own function
to c library
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®
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C
allows dynamic allocation of memory
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®
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It is
case sensitive language
|
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Ex: 1)
WAP for printing a msg
2) WAP for printing a symbol
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