Hello, I was having some problems with structs, stacks and memory management, and I was hoping someone could help me out.
i am having problems with my make node
my struct is as follows
ThanksCode:typedef struct node{ Stack entry; struct node *next; } Node; for the Make node Node *MakeNode(StackEntry item) { Node *nptr; entry = nptr->item; }
Also i would like return null if it is out of memory, if not a ptr to enough memory to hold a node
Thanks
>Node *nptr;
>entry = nptr->item;
You forgot to allocate memory for the node and you got the assignment backwards:
[edit]Code:typedef struct node{ Stack entry; struct node *next; } Node; Node *MakeNode(StackEntry *item) { Node *nptr; if ( ( nptr = malloc ( sizeof *nptr ) ) != NULL ) { nptr = item; return nptr; } else return NULL; }
I may have mistaken your intention, here is another option:
[/edit]Code:Node *MakeNode(StackEntry *item) { if ( ( item = malloc ( sizeof *item ) ) != NULL ) return item; else return NULL; }
-Prelude
Last edited by Prelude; 03-19-2002 at 09:28 PM.
My best code is written with the delete key.
