int **p; what is the meaning of this code?

Question

whats that mean?

Answer 1

It is a pointer to a pointer.

Answer 2

It is multiple indirection.

When a pointer points to other pointer , it is called multiple indirection.

for example
int x = 3;
int *p1 = &x;
int **p2 = &p1;
int ***p3 = &p2;

Access the value of variable by dereferencing pointer.

cout<<x<<endl;
cout<<*p1<<endl;
cout<<**p2<<endl;
cout<<***p3<<endl;

Answer 3

it is a pointer to pointer where a pointer is pointing to the address that us being pointed by another pointer. for example ,
int x = 5;
int *p=&5;
int *q=&p;

Answer 4

int main(){
int p = 8;
int q = 7;
int *pp = &p;
int *qq = &q;
int **pq = &pp;

cout << **pq << endl;

pq = &qq;

cout << **pq << endl;

return 0;
}

Output:
8
7

Answer 5

or a pointer to 2D array.

a[][] can also be represented as **a

Answer 6

Its a pointer ! It stores address of a particular variable unlike normal variable that stores value