Counting the number of nodes of a linked list

Program

# include <stdio.h>
# include <stdlib.h>
struct node
{
int data;
struct node *link;
};
struct node *insert(struct node *, int);
int nodecount(struct node*);
void printlist ( struct node * );

struct node *insert(struct node *p, int n)
{
   struct node *temp;
   if(p==NULL)
   {
      p=(struct node *)malloc(sizeof(struct node));
      if(p==NULL)
      {
   printf("Error\n");
          exit(0);
      }
      p-> data = n;
      p-> link = NULL;
   }
   else
   {
      temp = p;
      while (temp-> link!= NULL)
     temp = temp-> link;
      temp-> link = (struct node *)malloc(sizeof(struct node));
      if(temp -> link == NULL)
      {
   printf("Error\n");
         exit(0);
      }
     temp = temp-> link;
      temp-> data = n;
      temp-> link = NULL;
      }
      return (p);
}

void printlist ( struct node *p )
{
      printf("The data values in the list are\n");
      while (p!= NULL)
      {
   printf("%d\t",p-> data);
         p = p-> link;
      }
}

/* A function to count the number of nodes in a singly linked list */
int nodecount (struct node *p )
{
   int count=0;
   while (p != NULL)
   {
      count ++;
      p = p->link;
   }
      return(count);
}

void main()
{
   int n;
   int x;
   struct node *start = NULL ;
   printf("Enter the nodes to be created \n");
   scanf("%d",&n);
   while ( n-- > 0 )
   {
printf( "Enter the data values to be placed in a node\n");
      scanf("%d",&x);
      start = insert ( start,x);
   }
   printf("The created list is\n");
   printlist ( start );
   n = nodecount(start);
   printf("The number of nodes in a list are: %d\n",n);

}