Compilare: user.c: In function ‘sortlex’: user.c:73:13: warning: array subscript has type ‘char’ [-Wchar-subscripts] if( compar ( cai[ point[ j ] ], cai[ point[ min ] ] ) ) min = j; ^ user.c:73:13: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c: In function ‘main’: user.c:103:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] while ( cai[ point[ i ] ] [ poz ] != '\n' ){ ^ user.c:104:13: warning: array subscript has type ‘char’ [-Wchar-subscripts] fputc ( cai[ point[ i ] ] [ poz ], out ); ^