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Programming C

M S Prasad , UAA 105

C is a programming language designed for system programmers

, and device drivers and application program exiility! "#e

exiility of data de$nition , pointers % directly accessing t#e

memory & ma'es it easier to design a complex program !

A computer program operates on data % variale& and produces

t#e result!

Variable ( data ) types.

a! (nteger ) (nteger are *#ole numers represented as 1+ it

contagious memory in t#e computer! "#e integer could e

signed or unsigned also!

(nt var1 , var - ./ #ere var 1 and var are t*o variales

*#ic# #as een de$ned as integer! /."o represent a #ig#er integer values t#an 1+ it , it is

de$ned as long int % ma'es it it &A numer t#at is too large for an integer is automatically

converted to long !(t is read as )scanf% 2d& and printed as printf% 2d&! some more

representations are elo* )

data type 3ead% scanf%&

Print% printf%& 0

s#ort 2#d 2dlong 2ld 2ldUnsigned int 2u 2u

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4exadecimal 2x 2xctal 2o 2o

! 6loating numers % oat ! long doule , doule & "#esevariales are decimal numer representations t#ey are

represented as sign it , exponent and fraction part! "#e

oat representation re7uires it storage and provides

around 8 signi$cant digits!Most of t#e compilers do arit#metic operations in doule

precision only!% y default all oat declaration are doule&!scanf%2f& , printf%2f&

9xample 1

./ compute example area of circle /.

:include ;stdio!#+main%&

? doule radius , area -

printf% @ enter 3adius ) & - scanf%2lfB,radius& -area D pi/radius/radius -printf% area in oating numer ) 2fEn , area&-printf% area in exp notation ) 2eEn, area&-return 0-F

9xample

./ rate of interest tale /.: include ;stdio!#