Correct C++ pointer syntax

Question

I am struggling with understanding the correct pointer syntax, various sources seem to be doing it differently.

Which one of these is correct?

int* p = NULL;
int * p = NULL;
int *p = NULL;

and these?

*p = &x;
* p  = &x;

Sorry for the beginner question but I can't seem to find a straight answer.

Does the * goes right after the data type, right before the var name or in between?

Answer 1

All are valid, and have the same meaning, so it's a matter of personal choice.

The one thing to beware of is this:-

int* i,j;

Despite appearances this declares i as a pointer to int, but j is just an int. See this question here for details. If really you want this, use..

int *i;  
int j;   

Or, if you insist on having them on one line

int j, *i;