liste funzioni principali, programma2

#include
#include

typedef struct listNode listNode;
typedef struct listNode *List;
typedef int itemType;

struct listNode{
itemType item;
List next;
};




List insertHead(itemType v, List head);
List newNode(itemType v);
List deleteHead(List);
List stampa(List);


main(){
List l=NULL;
int i;
for(i=0;i<10;i++){
l=insertHead(i*10,l);
}
stampa(l);
}



List newNode(itemType v){
List head;
head=(List)malloc(sizeof(List));
head->item=v;
head->next=NULL;
return head;
}


List insertHead(itemType v, List head)
{
List ptr = newNode(v);
ptr->next=head;
return ptr;
}

List deleteHead(List head){
if(head==NULL){printf("la lista e' vuota\n");exit(1);}
List ptr=head;
head=head->next;
free(ptr);
return head;
}


List stampa(List L)
{
if(L==NULL) { printf("NULL\n");exit(0);}
printf("%d->",L->item);
stampa(L->next);
}