}
//这部分函数返回类型为node<type>指针,是扩展list功能的接口
node<type> *pget()
{
return current;
}
node<type> *pnext()
{
prior = current;
current = current->link;
return current;
}
node<type> *pgetnext()
{
return current->link;
}
node<type> *pgetfirst()
