C Programming - Declarations and Initializations - Discussion
Discussion Forum : Declarations and Initializations - General Questions (Q.No. 4)
4.
Is there any difference between following declarations?
| 1 : | extern int fun(); |
| 2 : | int fun(); |
Answer: Option
Explanation:
extern int fun(); declaration in C is to indicate the existence of a global function and it is defined externally to the current module or in another file.
int fun(); declaration in C is to indicate the existence of a function inside the current module or in the same file.
Discussion:
56 comments Page 6 of 6.
Sm das said:
1 decade ago
It is a keyword which functioning same as global and local variables.
Vijay said:
1 decade ago
Why we use extern function in C?
Subhasish said:
1 decade ago
Could anybody please tell me what is the scope for extern, I mean; say we have two files in two different directories I want to use one variable/function of file1 in file2 but those 2 are in diff. Directories. So can I access the elements of file1 in file2 using extern?
Pradeep said:
1 decade ago
Does storage classes can be used with data types and keywords.
Preethe said:
1 decade ago
What is meant by global variables? please explain.
Mumukshu said:
1 decade ago
The answer is incorrect. In C language, by default all function declarations are extern as C does not support local functions. Extern func(); and func(); are the same.
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