Compile Error

In file included from /in/Compile/dlist_pre.cpp:2:
In file included from /in/Compile/dlist.h:78:
/in/dlist_impl.h:17:19: error: use of undeclared identifier 'nullptrptr'; did you mean 'nullptr'?
        newfirst->prev = nullptrptr;
                         ^~~~~~~~~~
                         nullptr
1 error generated.
/in/Compile/Makefile:29: recipe for target 'buildDlistPretest' failed
make: *** [buildDlistPretest] Error 1

Information

Submit By
Type
Submission
Homework
Project Five: List Stack and Queue
Language
C++
Submit At
2019-08-01 21:29:21
Judged At
2019-08-01 21:29:21
Judged By
Score
0
Total Time
0ms
Peak Memory
0 Bytes