Compilare: user.cpp: In destructor ‘trie::~trie()’: user.cpp:27:12: warning: deleting array ‘((trie*)this)->trie::fii’ [enabled by default] delete[] fii; ^ user.cpp:27:12: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] user.cpp: In function ‘int Compare(int, int)’: user.cpp:38:6: warning: unused variable ‘lenX’ [-Wunused-variable] int lenX = strlen(S[X]); ^ user.cpp:39:6: warning: unused variable ‘lenY’ [-Wunused-variable] int lenY = strlen(S[Y]); ^