Compilare: user.cpp: In function ‘int main()’: user.cpp:91:12: warning: unused variable ‘aux’ [-Wunused-variable] bool aux = t->deleteWord(t, s, 0, length); ^ user.cpp:76:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("trie.in", "r", stdin); ^ user.cpp:77:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("trie.out", "w", stdout); ^ user.cpp:86:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s); ^ user.cpp: In member function ‘int Trie::prefixes(char*, int)’: user.cpp:72:3: warning: control reaches end of non-void function [-Wreturn-type] } ^