Compilare: user.cpp: In function ‘void P2()’: user.cpp:48:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<strlen(S); ++i){ ^ user.cpp:49:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[S[i]] = i; ^ user.cpp:58:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[Cuv[nr[i]].l[j]] > v[Cuv[nr[i+1]].l[j]]){ ^ user.cpp:58:64: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[Cuv[nr[i]].l[j]] > v[Cuv[nr[i+1]].l[j]]){ ^