Compilare: main.cpp: In function 'void elim(Trie*, char*)': main.cpp:20:12: warning: NULL used in arithmetic [-Wpointer-arith] 20 | if(*p==NULL) | ^~~~ main.cpp: In function 'void adaug(Trie*, char*)': main.cpp:28:12: warning: NULL used in arithmetic [-Wpointer-arith] 28 | if(*p==NULL) | ^~~~ main.cpp: In function 'int nrap(Trie*, char*)': main.cpp:42:12: warning: NULL used in arithmetic [-Wpointer-arith] 42 | if(*p==NULL) | ^~~~ main.cpp: In function 'int cmlpc(Trie*, char*)': main.cpp:57:12: warning: NULL used in arithmetic [-Wpointer-arith] 57 | if(*p==NULL||nod->fiu[p[0]-'a']==NULL) | ^~~~