Compilare: user.cpp: In function ‘int main()’: user.cpp:15:17: warning: statement has no effect [-Wunused-value] if (n!=m) ok==0; ^ user.cpp:22:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (cod[x[i]] && cod[x[i]]!=y[i]){ ok=0; break;} ^ user.cpp:22:42: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (cod[x[i]] && cod[x[i]]!=y[i]){ ok=0; break;} ^ user.cpp:23:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] else {cod[x[i]]=y[i];} ^ user.cpp:32:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (cod[c]) fout<<c<<" "<<cod[c]<<'\n'; ^ user.cpp:32:44: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (cod[c]) fout<<c<<" "<<cod[c]<<'\n'; ^