Link with Head

link.c

#include <stdio.h>
#include <stdlib.h>
typedef struct LNode
{
	int data;
	struct LNode *next;
}LNode,*Node;

typedef struct Hnode
{
	struct LNode *next;
	struct LNode *end;
	int len;
}Hnode,*HEAD;


HEAD init(HEAD H){
	H = (HEAD)malloc(sizeof(Hnode));
	H->end = NULL; 
	H->next = NULL;
	return H;
}
int add_r(HEAD H,int data){
	Node newnode,p = NULL;
	p = H->next;
	if (p!=NULL){
		printf("ADD Node:%d\n",data);
		while(p&&p->next!=NULL){
			p = p->next;
			printf("loop\n");
		}
		p->next = newnode = (Node)malloc(sizeof(LNode));
		newnode->data = data;
		newnode->next = NULL;
	}
	else{
		printf("ADD First Node:%d\n",data);
		H->next = newnode = (Node)malloc(sizeof(LNode));
		newnode->data = data;
		newnode->next = NULL;
	}
	H->end = newnode;
	return 1;
}
int add_l(HEAD H,int data){
	Node newnode,p;
	if (H->next!=NULL){
		printf("ADD Node:%d\n",data);
		p=H->next;
		H->next = newnode =(Node)malloc(sizeof(LNode));
		newnode->data = data;
		newnode->next = p;
	}
	else{
		printf("ADD First Node:%d\n",data);
		H->next = newnode =(Node)malloc(sizeof(LNode));
		newnode->data = data;
		newnode->next = NULL;
	}
	return 1;
}
int insert(HEAD H,int i,int data){
	Node p = H->next,newnode;
	printf("Insert Node:%d=>%d\n",i,data);
	int j=0;
	while(p&&j<i-1){
		p = p->next;
		++j;
	}
	if (!p||j>i-1){
		printf("Error\n");
		return 0;
	}
	newnode=(Node)malloc(sizeof(LNode));
	newnode->data = data;
	newnode->next = p->next;
	p->next = newnode;
	return 1;
}
int rev(HEAD H){
	Node p=H->next,s,q;
	if (p&&p->next!=NULL)
	{
		q = p->next;
		while(q){
			s = q->next; 
			q->next = p;
			p = q;
			q = s;
			}
		H->next->next = NULL;
		H->next = p;
		return 1;
	}
	else{
		return 0;
	}
}
void GetElem(HEAD H){
	Node p = NULL,q = NULL;
	printf("Head:next[%p],end[%p]\n",H->next,H->end);
	p = H->next;
	int i = 1;
	if(p!=NULL){
		printf("%d:%d\n",i,p->data );
	q = p->next;
	while (q){
		printf("%d:%d\n",++i,q->data);
		q = q->next;
		}
	}
}
int main(int argc, char const *argv[])
{
	HEAD head = NULL;
	head = init(head);
	add_r(head,233);
	add_r(head, 345);
	add_l(head, 111);
	insert(head, 2, 222);
	rev(head);
	GetElem(head);
}