skpmca

• Feb 2nd, 2006

 

there r of 4 type of storage class in C

static

auto

register

extern

Zdharan

• Feb 22nd, 2006

 

auto - its a local variable. Valid only within that fn. . garpage initial valuestatic - stored in permenent memory. Initial value 0. Valid for all fn.Register - stored in CPU register. Used for fast arithmatic operation. Limited no. of reg variables. When it exeeds it will take it as auto variable. Extern - Extern the variable access from one fn. to other fn.

skr_ymca

 Profile Answers by skr_ymca Questions by skr_ymca

• Mar 2nd, 2006

 

variables in C may posses an attribute called storage class in addition to data type. A storage class controls  lifetime , scope and linkage of a variable.

there are five types of storage classes in C:

      storage class                lifetime                 scope               linkage

(1) auto                             within a block       block scope        NO

(2) register                         within block          local scope         NO

(3) static class

     (a) internal static           persistent             local                    NO

     (b) external                  persistent              file scope            internal linkage

(4) Extern                         persistent              file scope            internal/external

(5) Another storage class is typedef which is different from other storage classes and is  used for creating user defined data types. it does not create a new data type, but it only rename existing data type.

supriya

• Mar 18th, 2006

 

hi,

1.auto

2.static

3.extern

4.register

5.volatile

paulson paul chambakottukudyil

• Apr 17th, 2006

 

"volatile" seems to be strange for me. Can you explain please..........

Mahananda R.Biradar

• May 12th, 2006

 

 Actually there are only two storage Classe........its given in K & R

abhimanipal

 Profile Answers by abhimanipal 

• Jan 23rd, 2010

 

I do not think volatile is a storage class.
Volatile is a instruction given to the compiler not to optimize this variable.