bt take input

 binaryTree <int>* takeInput(){

    int rootData;

    cout<<"Enter data: ";

    cin>>rootData;

    if (rootData==-1){

        return NULL;

    }

    binaryTree<int>* root=new binaryTree<int>(rootData);

    binaryTree<int>* leftchild=takeInput();

    binaryTree<int>* rightchild=takeInput();

    root->left=leftchild;

    root->right=rightchild;

    return root;

}


//1 2 4 -1 -1 5 6 -1 -1 7 -1 -1 3 8 -1 -1 -1 

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