Single Linked List Program in "C"

#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
struct link
{
  int data;
  struct link *ptr;
}*head=NULL;

void insert()
{
  char point;
  do
  {
    struct link *newlink,*currentlink;
    newlink=(struct link*)malloc(sizeof(struct link));
    printf("\nEnter data into linked list");
    scanf("%d",&newlink->data);
    newlink->ptr=NULL;
    if(head==NULL)
    {
      head=newlink;
      currentlink=newlink;
    }
    else
    {
      currentlink->ptr=newlink;
      currentlink=newlink;
    }
    printf("\nDo you want to continue?");
    point=getche();

  }while(point!='n');

}
void display()
{
  struct link *iterator;
  iterator=head;
  printf("\n Data in your linked list is");
  while(iterator!=NULL)
  {
    printf("%d----->",iterator->data);
    iterator=iterator->ptr;
  }
  printf("NULL");
}
main()
{

  insert();
  display();
  return 0;

}

output
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