Interested to Buy Any Domain ? << Click Here >> for more details...
What does extern mean in a function declaration?
- 4 Answers
- 38114 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
extern is significant only with data declarations. In
function declarations, it can be used as a stylistic hint
to indicate that the function's definition is probably in
another source file, but there is no formal difference
between
extern int f();
and
int f();
| Is This Answer Correct ? | 91 Yes | 14 No |
Answer / poornima
extern is a keyword that is prefixed in function
declaration. It means tht function definition is in source
file.
for eg.
source file contains int sum(int x,int y) definition part.
To make use of this function in file by simply declare as
extern int sum(int ,int); is a good practice.
But to compiler happy extern sum(); is enough.
| Is This Answer Correct ? | 34 Yes | 16 No |
Answer / zxg
(from MSDN)
Functions declared as extern are visible throughout all source files in the program (unless you later redeclare such a function as static). Any function can call an extern function.
Function declarations that omit the storage-class specifier are extern by default.
| Is This Answer Correct ? | 4 Yes | 3 No |
Answer / aravind
Extern is nothing but a memory storage type.If we declare extern before the function than the variable can be accessed by that function not only locally but externally too.
extern int a=4
Int fun (int x)
{
x=a;
print gives a=4
| Is This Answer Correct ? | 8 Yes | 19 No |
#define MAX(x,y) (x) >(y)?(x):(y) main() { inti=10,j=5,k=0; k= MAX(i++,++j); printf("%d..%d..%d",i,j,k); }
marge linklist
What are preprocessor directives in c?
What are the characteristics of arrays in c?
In this assignment you are asked to write a multithreaded program to find the duplicates in an array of 10 million integers. The integers are between -5000,000 to 5000,000 and are generated randomly. Use 10 threads, each thread works on 1000,000 integers. Compare the time needed to accomplish the task with single thread of execution program. Do not include the time to fill the array with integers in the execution time.
Explain what’s a signal? Explain what do I use signals for?
What is the method to save data in stack data structure type?
how can use subset in c program and give more example
What is the output of the following progarm? #include<stdio.h> main( ) { int x,y=10; x=4; y=fact(x); printf(“%d\n”,y); } unsigned int fact(int x) { return(x*fact(x-1)); } A. 24 B. 10 C. 4 D. none
a single linked list consists of nodes a to z .print the nodes in reverse order from z to a using recursion
What is meant by errors and debugging?
How is null defined in c?
C 
