Assigning pointers from pointers in struct.

How can I assign a location to a pointer from a pointer within a struct.

if n->left points to "node a;"
how can I make node pointer ptr point to node a?

if you get my drift.

also if i have made a node.

Code:

node nn;
nn.val = 5;

how can i make an existing pointer within a node
which i have a pointer to point to the new node

Code:

int blah (node *mega)
{
  node nn;
  nn.val = 5;
  mega->left = nn;
  return 0;
}

doesnt seem to work. Or is this because the function is destroying the new node nn when it finishes?

Well you wouldn't want to do

node nn;
nn.val = 5;
mega->left = nn;

Because you're pointing at a local

But if you did, the syntax would be
mega->left = &nn;


This is more usual
node *nn = malloc( sizeof(*nn) );
nn->val = 5;
mega->left = nn;

Brilliant, thanks .