Compilare: user.cpp: In function ‘void inc(Trie*, char*, bool)’: user.cpp:36:26: warning: the address of ‘void inc(Trie*, char*, bool)’ will always evaluate as ‘true’ [-Waddress] if (inc && !node->son[CH]) node->son[CH] = new Trie; ^ user.cpp: In function ‘int main()’: user.cpp:56:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &NA); ^ user.cpp:60:26: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(line, 305, stdin); ^ user.cpp:65:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &NB); ^ user.cpp:67:26: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(line, 305, stdin); ^