CODEWITHSUNDEEP
cpointers
Tony The Lion
Tony The Lion

Reputation: 63310

What does this C statement mean?

I came across this line:

void (*(*x)(void (*[10])(int *)))(int *)

Can anybody tell me what it is?

Upvotes: 25

Views: 1548

Answers (4)

Jesse Good
Jesse Good

Reputation: 52405

To break this down yourself, start from the inner most parentheses and work your way out.

  1. (*[10]) <---- Array of 10 pointers
  2. (*[10])(int *) <------ Array of 10 pointers to functions which has a pointer to int as its argument
  3. (void (*[10])(int *)) <------ Array of 10 pointers to functions which has a pointer to int as its argument and returns void
  4. (*x)(void (*[10])(int *)) <------- x is a pointer to a function which has as an argument (an array of 10 pointers to functions which has a pointer to int as its argument and returns void)

.....

I stopped partway through, but hopefully that helps.

Upvotes: 43

Alexey Frunze
Alexey Frunze

Reputation: 62106

You can find explanations here:

Upvotes: 5

Seth Carnegie
Seth Carnegie

Reputation: 75150

cdecl is very helpful for this kind of thing. It says:

declare x as pointer to function (array 10 of pointer to function (pointer to int) returning void) returning pointer to function (pointer to int) returning void

Upvotes: 10

user142162
user142162

Reputation:

A pointer to a function which has an array of 10 pointers to functions that has int * argument and return type void as argument, and returns a pointer to a function which has int * argument and return type void.

Source

Upvotes: 3

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