Compilare: user.cpp: In function ‘bool si(char*, int&)’: user.cpp:80:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] val=valchar[x[p]]; ^ user.cpp: In function ‘bool echiv()’: user.cpp:165:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] valchar[ ch[j]]=v[j]; ^ user.cpp: In function ‘bool si(char*, int&)’: user.cpp:88:17: warning: ‘val’ may be used uninitialized in this function [-Wmaybe-uninitialized] return !val; ^