Compilare: user.cpp: In function ‘int main()’: user.cpp:49:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] fv [ sir [ i ] ] ++ ; ^ user.cpp:52:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( viz [ sir [ i ] ] == 0 ) { ^ user.cpp:53:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] viz [ sir [ i ] ] = 1 ; ^ user.cpp:54:75: warning: array subscript has type ‘char’ [-Wchar-subscripts] while ( vf and sir [ i ] < stiva [ vf ] and fv [ stiva [ vf ] ] > 0 ) { ^ user.cpp:56:36: warning: array subscript has type ‘char’ [-Wchar-subscripts] viz [ stiva [ vf ] ] = 0 ; ^ user.cpp:62:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] fv [ sir [ i ] ] -- ; ^