Question

I am creating a linked list program in C and I keep on getting a segmentation fault. I’ve narrowed the problem down to a few lines of code and I believe it has to do with checking for NULL. How can I fix this? Here’s the code:

typedef struct node
{
  int contents;
  struct node *nextNode;
}  Node;



deleteNode(Node *currentNode)
{

  while((currentNode->contents) != NULL)
  {
    //.....Do Stuff.....
    currentNode = currentNode->nextNode;
  }
}

Thanks

Answer 1

Try checking to make sure that currentNode isn’t NULL at the start of deleteNode(). I.e.

deleteNode(Node *currentNode)
{
    if (currentNode == NULL) return;
    // ...
    // ...
}