how can we use static and extern?and where can we use this?
- 3 Answers
- 6218 Views
- Excel, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / pramod
static storage class is used for the following situations
1) the variable is defined as static within a function and
we can call the function several times, but we want that the
function should initialize the variable only once that is
during the first call to that function.So the variable will
stay alive in different calls to this function
2)In C++ , if we want a common variable between all the
objects( like a counter for how many objects have been
created) then static is allocated as it is not attached to
any object but class
extern storage is for global variables
1)if we want one varibale to be available to all the
functions in our program, make the varibale as global
variable( extern storage), it will be accessed by all the
functions in that file.But avoid declaring variable as
global for security reasons( can be accessed from any other
file in the PATH) and memory reasons (global variables are
deallocated only when the entire program terminates).
2)if we declare a variable in a file as extern , then
compiler will assume that this variable is not defined in
the present file but in some other file.So while compiling
there won't bw any error but error will come at the linking
if the extern variable is not present in the refernced files.
There is one special case
static global variable
we want a variable to be global , means accessible to all
the functions in that file and want that the variable should
not be accessible to any other file, just to make it static
global variable.So the visibility of that variable becomes
file specific only.
| Is This Answer Correct ? | 3 Yes | 1 No |
the above answer is write.thanks to vignesh.
| Is This Answer Correct ? | 1 Yes | 0 No |
static and extern are some types of storage classes in C...
there are four types of storage classes in C:
1) automatic (auto) storage class
2) static storage class
3) register storage class
4) extern storage class
static is a one which will be read only once by the compiler
(ie) it will ignore an another pass.... or it will be
initialized only once....... the scope of this class is
within the block only....
extern is a global declaration , but most of the compilers
dont prefer it to be used within a program.......
thank u
| Is This Answer Correct ? | 3 Yes | 3 No |
how can i print "hello".please consider inverted commas as well.i want to print on console: "hello"
Hi Every one......... Please Any body give me the answer for my question. Is it possible to print the word "PRINT F", without using printf() statement in C-Language.
Why #include is used in c language?
What is a spanning Tree?
write a program whose output will be- 1 12 123 1234
Can we change the value of static variable in c?
Where static variables are stored in c?
WHO WROTE C LANGUAGE?
What is a class?
main() { float f1=10.5; double db1=10.5 if(f1==db1) printf("a"); else printf("b") }
Can a local variable be volatile in c?
What character terminates all strings composed of character arrays? 1) 0 2) . 3) END
C 
