Compilare: main.cpp: In function 'Trie* new_emptyNode()': main.cpp:35:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'void insert(Trie*, char*, int)': main.cpp:38:15: warning: NULL used in arithmetic [-Wpointer-arith] if (*w == NULL) ^~~~ main.cpp: In function 'int main()': main.cpp:106:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n%d", s, &n); ^ main.cpp:110:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("\n%s", a); ^