Compilare: user.cpp: In function ‘void erase_word(TRIE*, char*, int)’: user.cpp:48:17: warning: NULL used in arithmetic [-Wpointer-arith] if (*poz == NULL) ^~~~ user.cpp: In function ‘int main()’: user.cpp:63:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(cuv); j++) ~~^~~~~~~~~~~~~ user.cpp:71:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(cuv); j++) ~~^~~~~~~~~~~~~