ptr-ksk

#include<malloc>
struct node
{
int value;
struct node *next;
}*heal=NULL;

void insert_first(){
	struct node *ptr, *ptr1, *ptr2;
	ptr=(struct node*)malloc(size of(struct node));
	ptr->next=NULL;
	if(ptr==NULL)
	{
		head=ptr;
		ptr->next=NULL;
		ptr1=head;
	}
	else
	{
		ptr->next=head;
		head=ptr;
	}
	printf("value %d",ptr->value);
	printf("next add %d",ptr->next);
	printf("Own add %d", ptr);

	main()
	{
	int i;
	for(i=0; i<7; i++)
	insert_first();
	}
*last
if(head==NULL)
{
head=PTR;
PTR->next=NULL;
PTR1=head;
}
else
{
while(PTR1->next!=NULL)
{
PTR1=PTR1->next;
}
}

mid
if(head==NULL)
{
head=PTR;
PTR->next=NULL;
PTR1=head;
pos++;
}
else
{
int i;
for(i=0;i<pos;i++)
{
PTR1=PTR1->next;
}
PTR2=PTR1->next;
PTR1->next=PTR;
PTR->next=PTR2;
pos++;
}