Allocating memory for a structure member

[dalek]

Hi

I am new to C++ and obviously I have a few questions.

// If I declare a node like this
typedef struct NODE
{
	int *data;
	NODE *next;
}Node;

// And I have created a variable of this
// type and allocated memory for it like this
Node *rootp = new Node;

// I understand I have to allocate 
// Memory for the variable *data 
// to use it..
rootp->data = new int;
rootp->data = 10;

Now, I know there is a mistake above, but I am not sure why - my understanding of pointers is limited, I'm good if it is a single variable, but I get confused when I am face with structures or function arguments...

[dalek]

Oh god - thanks.

It's funny - I had that originally but under the debugger it was failing on that line every time..

rootp = NULL;
rootp->data = new int;
*rootp->data = 10;

I guess it was failing because rather than pointing the rootp->next member to NULL I was pointing rootp to NULL, which would mean I was writing data nowhere?? Is that correct?

Thanks for the help Salem.

[dalek]

Cheers - I think I am learning!

Thanks Salem.