In file included from /in/compile/ex2.cpp:1:0:
/in/ex2.h: In function 'int hex2decLinkedList(Node*)':
/in/ex2.h:16:9: error: variable 'num' set but not used [-Werror=unused-but-set-variable]
     int num[10];
         ^~~
/in/ex2.h:54:1: error: no return statement in function returning non-void [-Werror=return-type]
 }
 ^
cc1plus: all warnings being treated as errors