What do these declarations mean ?

[akudewan]

Hi,

I have a list of questions given to me, and I can't figure out a few of them. I looked up in some books, but I still can't get it...

What do the following declarations mean ?:


1) char sample(int (*pf)(char a, char b));
2) int(*pf)(void);
3) int(*pf)(char a, char b);
4) int(*pf)(char *a, char *b);


Edit: There's one more:


void fn(int a[])


Thanks in advance

[hod139]

What do the following declarations mean ?:


1) char sample(int (*pf)(char a, char b));
2) int(*pf)(void);
3) int(*pf)(char a, char b);
4) int(*pf)(char *a, char *b);

These are function pointers (I'm geussing pf stands for "pointer to function"). pf is a function pointer and points to a function that takes:
1) <strike>2 chars and returns an int</strike> Edit: The function sample takes for a parameter a function pointer which points to a function that takes 2 chars and returns an int. The function sample returns a char.
2) a void (no parameters) and returns an int
3) 2 chars and returns an int
4) 2 pointers to two chars, and returns an int

See the function pointer tutorial (http://www.newty.de/fpt/index.html) for more help.


Edit: There's one more:


void fn(int a[])
This is a function that takes an integer array.

[akudewan]

Cool. Thanks :)