CODEWITHSUNDEEP
c
Abderrahmane Mechri
Abderrahmane Mechri

Reputation: 89

what does " void (*f)(void) " in C mean

Can anyone explain this line of code in C : 

void (*f)(void)= &fs ;

I tried to look in google for an explanation but i didn't find anything about it.

Upvotes: 0

Views: 3480

Answers (2)

Sourav Ghosh
Sourav Ghosh

Reputation: 134286

I put the same statement in cdecl and its shows me

declare f as pointer to function (void) returning void.

That is it!! In other words, here, we define a variable f of type as a pointer-to-a-function which accepts no arguments, ((void)) and returns a void, too. We are initializing the variable with the address of another function fs, so that, f points to the fs function and can be used to call / invoke fs.

Upvotes: 2

Paul Coldrey
Paul Coldrey

Reputation: 1439

It is defining a variable 'f' that is a function pointer which points to the function 'fs'. 'fs' is a function that takes no arguments are returns nothing so it might look like:

void fs(void) { printf("in fs"); }

If you ran the following code after the line in your question

(*f)();

It would call 'fs' and you would get a print out of "in fs"

Upvotes: 3

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