Pointers and functions in c

Question

Please consider the following code

#include<stdio.h>
int fun(); /* function prototype */

int main()
{
    int (*p)() = fun;
    (*p)();  
    return 0;
}
int fun()
{
    printf("IndiaBix.com\n");
    return 0;
}

What is int(*p)() here?Is it a function,variable or what?

p is a function pointer points to a funtion that returns a value of type int. — user2778477
– user2778477, Commented Sep 15, 2013 at 8:12
When in doubt, just use cdecl.org: cdecl.ridiculousfish.com/?q=int%28%2Ap%29%28%29. — Oliver Charlesworth
– Oliver Charlesworth, Commented Sep 15, 2013 at 8:14

P0W · Accepted Answer · 2013-09-15 08:14:12Z

6

Flow spiral rule :

                 +------+
                 |      |
                 |  +-+ |
                 |  ^ | |            
             int ( *p ) ()
               ^ |    | |
               | +----+ |
               +--------+

               Identifier p
                 is a pointer to..
                 is a pointer to a function  
                 is a pointer to a function returning int

answered Sep 15, 2013 at 8:14

P0W

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Comments

No Idea For Name · Accepted Answer · 2013-09-15 08:21:40Z

1

p is a pointer. the (*p)() means he is a pointer to a function . int (*p)() also means the function it points to return integer.

answered Sep 15, 2013 at 8:21

No Idea For Name

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Comments

Rouki · Accepted Answer · 2013-09-15 08:13:44Z

0

int(*p)() - p is a pointer to function which receives nothing and returns an int.

p is therefore a variable ofc.

edited Sep 15, 2013 at 8:13

answered Sep 15, 2013 at 8:12

Rouki

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1 Comment

Paul R Over a year ago

Actually in C it can receive any number of parameters, since it is not declared as (void).

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