why pointer->data works , whereas *double_pointer->data doesn't?

Question

I have a class 'node' which has two members data and *next. When I am accessing data using pointer then it is working fine whereas when i am accessing it using double pointer , it is throwing an error . Can anyone explain me why this is happening?

class node{
public:
    int data;
    node *next;
};

push(&a,8);

void push(node **p , int x){
*p->data = 11;
}

Why this p->data showing error: request for member ‘data’ in ‘ p’, which is of pointer type ‘node*’

It's an issue of [*operator precedence*](https://en.cppreference.com/w/cpp/language/operator_precedence). — Some programmer dude, Jun 05 '19 at 15:50

score 3 · Answer 1 · answered Jun 05 '19 at 15:50

3

Because *p->data is *(p->data), not (*p)->data.

Read about operator precedence.

answered Jun 05 '19 at 15:50

Lightness Races in Orbit

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1

Can't believe it is not a duplicate of a duplicate. – SergeyA Jun 05 '19 at 15:51
N.B. an online tool for this [sort of exists](https://stackoverflow.com/a/56464040/560648) – Lightness Races in Orbit Jun 05 '19 at 15:54

why pointer->data works , whereas *double_pointer->data doesn't?

1 Answers1