Question

Are pointers to pointers legal in c++? I’ve come across this SO question: Pointer to Pointer to Pointer

But the answers aren’t clear if it is legal c++ or not. Let’s say I have:

class A{
public:
    void foo(){
        /* ect */
    }
};

class B{
public:
    A* a;
    /* ect */
};

void Some_Func() {
    B *b;

    // besides this looking ugly, is it legal c++?
    b->a->foo();
};

Is the line b->a->foo() OK to write? Is there a better way to represent this expression?

Answer 1

This is perfectly valid.But the term you are using “pointer to pointer” is wrong.

the term means a double pointer like **P,a pointer which holds the address of another pointer.

but your case is the pointer(of class A) is an member of a class whose pointer(of class B) is created by you in some_func