C++ segmentation fault while checking for null pointer

Applications Programming
1 
void disptree(node *ptr)
{
    if ((ptr->left) !=NULL)
    disptree(ptr->left);

    cout<<"Position:"<<ptr->pos<<" Data:"<<ptr->data<<endl;

    if ((ptr->right)!=NULL;
    disptree(ptr->right);
}

i'm getting a segmentation fault at the red line. i cannot understand what's the problem. Help me out.
Thanks in advance..

2

You may also want to check if ptr is null or not. Something like

if (ptr && (ptr->left) !=NULL)

And likewise with ptr->right.

3

Hi Vijay,

You are passing a pointer to this function. Ensure that the pointer is valid from where you called this fuction. It should not be pointing to deleted are freed objects.

-Vijay

4

Thank u for ur time ppl. made a mistake at other part of prog so null was being to ptr...