In file included from /in/call.cpp:1:
In file included from /in/dlist.h:75:
/in/dlist_impl.h:8:19: error: use of undeclared identifier 'NULL'
return (first == NULL);
^
/in/dlist_impl.h:17:19: error: use of undeclared identifier 'NULL'
newfirst->prev = NULL;
^
/in/dlist_impl.h:22:20: error: use of undeclared identifier 'NULL'
newfirst->next = NULL;
^
/in/dlist_impl.h:37:13: error: use of undeclared identifier 'NULL'
np->next = NULL;
^
/in/dlist_impl.h:42:14: error: use of undeclared identifier 'NULL'
np->prev = NULL;
^
/in/dlist_impl.h:65:15: error: use of undeclared identifier 'NULL'
if (first == NULL)//which means there is only one element in the list
^
/in/dlist_impl.h:67:10: error: use of undeclared identifier 'NULL'
last = NULL;
^
/in/dlist_impl.h:71:17: error: use of undeclared identifier 'NULL'
first->prev = NULL;
^
/in/dlist_impl.h:91:14: error: use of undeclared identifier 'NULL'
if (last == NULL)//which means there is only one element on list
^
/in/dlist_impl.h:93:11: error: use of undeclared identifier 'NULL'
first = NULL;
^
/in/dlist_impl.h:97:16: error: use of undeclared identifier 'NULL'
last->next = NULL;
^
/in/dlist_impl.h:104:9: error: use of undeclared identifier 'NULL'
:first(NULL), last(NULL)
^
/in/dlist_impl.h:104:21: error: use of undeclared identifier 'NULL'
:first(NULL), last(NULL)
^
/in/dlist_impl.h:109:16: error: use of undeclared identifier 'NULL'
this->first = NULL;
^
/in/dlist_impl.h:110:15: error: use of undeclared identifier 'NULL'
this->last = NULL;
^
/in/dlist_impl.h:152:17: error: use of undeclared identifier 'NULL'
while (here != NULL)
^
16 errors generated.
/in/Compile/Makefile:39: recipe for target 'buildCall' failed
make: *** [buildCall] Error 1