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		A singly linked list
typedef struct node* Nodeptr; struct node { int data; Nodeptrnext; };						......
Nodeptrmknode (int item)

{
Nodeptrnp;
np = (Nodeptr) malloc (sizeof (struct node));
if (np != NULL) {
np->data = item;
np->next = NULL;
} else exit (1);
return np;
}

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