/* badPointer.c */

#include <stdio.h>
#include <stdlib.h>

struct node
{
   int info;
   struct node *next;
};

typedef struct node *NodePtr;

NodePtr head = NULL;
//NodePtr head;

void AddToFront( int x );
int DeleteFront();
void PrintList();

int main()
{
   int n;

   AddToFront( 3 );
   AddToFront( 2 );
   AddToFront( 1 );

   PrintList();

   n = DeleteFront();
   printf( "%d\n", n );

   return 0;
}

void AddToFront( int x )
{
   NodePtr n = (NodePtr)malloc(sizeof(struct node));
   n->info = x;
   n->next = head;

   //head = n;
}

int DeleteFront()
{
   NodePtr p = head;
   int n = head->info;
   

   free( (void *)p );
}


void PrintList()
{
   NodePtr p = head;

   printf( "Current list contents: " );
   printf( "{ " );
   while( p )
   {
      printf( "%d", p->info );
      p = p->next;
   }
   printf( " }\n" );
}