Discussion :: Declarations and Initializations
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Is there any difference between following declarations?
1 : extern int fun(); 2 : int fun();
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A.
Both are identical
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B.
No difference, except extern int fun(); is probably in another file
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C.
int fun(); is overrided with extern int fun();
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D.
None of these
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Answer : Option B
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.
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