Compilare: user.cpp: In function ‘bool T(const char*, int&)’: user.cpp:20:36: warning: array subscript has type ‘char’ [-Wchar-subscripts] return ( mask >> pz[v[p ++]] ) & 1; ^ user.cpp: In function ‘bool cmp(char*, char*)’: user.cpp:78:51: warning: operation on ‘vp’ may be undefined [-Wsequence-point] if ( E( a, vp = 0 ) != E( b, vp = 0 ) ) ^ user.cpp:71:13: warning: variable ‘pz’ set but not used [-Wunused-but-set-variable] int pz[26], k = 0; ^