How do I fix error: "invalid use of non static data member for a pointer object"?

Asked Jul 18 '22 at 17:19

Active Jul 19 '22 at 15:38

Viewed 42 times

class BinaryTree {
    public:
        BinaryNode* root;
        
        bool search(int val, BinaryNode* zero = root){ // Error
            ...
       }
};

I have tried to add a static access specifier to root but it throws error: undefined reference to BinaryTree::root'

edited Jul 19 '22 at 15:38

ashelkov

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asked Jul 18 '22 at 17:19

Sid_Emvi

1

As for `bool search(int val, BinaryNode* zero = root)`, the static member will not help here. Use `nullptr` instead of `root` and a condition in the inside. – 273K Jul 18 '22 at 17:25
Any chance you meant this: – Sid_Emvi Jul 18 '22 at 17:37
bool search(int val, BinaryNode* zero = nullptr){ if (zero==nullptr) zero = root; – Sid_Emvi Jul 18 '22 at 17:38
Yes, you have understood me correctly. – 273K Jul 18 '22 at 17:40

How do I fix error: "invalid use of non static data member for a pointer object"?

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