Hi
To first I want to say Hello to everyone here.
I tought since a few day about pointers of function. I know that in C is pointers important fur speed. I have seen that I can write simply a function and use it next time. I agree that for variable are pointers important but why therefor use pointers to function?

I tought the same of pointers of pointers. why and when must we use pointers of pointers ?
here ist an exemple :
struct node
{
int data;
struct node *link;
}
typedef struct node *pNode;

pNode insert ( node **p, int **value)
{
...
...
...
}
I understand the pointer`s mecanism, but these to points I mentioned are not clar in mine head.
Best regards!
Cyrille