c++ - invalid use of non-static member C++98 -

i'm writing c++ program that, unfortunately, requires use of c++98 compiler. after writing program , trying compile error:

error: invalid use of non-static data member 'graph::adj_list'

this confusing me since used cppreference (http://en.cppreference.com/w/cpp/language/data_members) make sure compile. can me out?

graph_frame.h

#include <cstddef>   class node{ friend class graph; private:     int node_name;     int edge_weight;     node *next_cell = null;     node *previous_cell = null;  public:     node(int name = 0, int new_edge = 0);     ~node(); };   class graph{ private:     void recursive_delete(int i, int k);     node** adj_list;                     <----------------error  public:     //----argument not needed constructor because list not created     //----until create_graph() called     graph();     ~graph();     //----remember free buckets list     void create_graph(int& graph_nodes);     int check_node(int& source_node, int& dest_node);     void insert_node(int& source_node, int& dest_node, int& weight);     void print(node **dummy = adj_list, int = 0, int k = 0);     void delete_node(int& source_node, int& dest_node); }; 

node *next_cell = null; node *previous_cell = null; 

that won't fly - in-class initializers non-static members introduced in c++11.

about adj_list, real location of error here:

void print(node **dummy = adj_list, int = 0, int k = 0); //                      ^^^^^^^^^^ 

you can't have class member default value because it's not known instance should belong. can't use this there either, you'll have figure out other way pass default value.