C++教程:C++友元类讲解

   cout <<"Node constructor is running..." <<endl;
   count++;
   idata=0;
   cdata='0';
   prior=NULL;
   next=NULL;
}
Node::Node(int i,char c)
{
   cout <<"Node constructor is running..." <<endl;
   count++;
   idata=i;
   cdata=c;
   prior=NULL;
   next=NULL;
}
Node::Node(int i,char c,Node *p,Node *n)
{
   cout <<"Node constructor is running..." <<endl;