???????m_Name???????????m_sName??char *?????const???????????????????????????
????const????????????????????????б???const????????????????:
class Screen {
public:
char get(int x??int y);
char get(int x??int y) const;
};
??????????????￡????????????????????????????
const Screen cs;
Screen cc2;
char ch = cs.get(0?? 0);  // ????const???????
ch = cs2.get(0?? 0);     // ???÷?const???????<span style="font-family: Arial?? Helvetica?? sans-serif;"> </span>
????С??
????1??const???????????????const??????const????????const????????????????const???????????????????
????2????const???????????????const??????const????????const???????????????????const?????????????????
????3??????????????????????????????????????ó??????????????????????????????????????ó???????????const ?????????
????4) ?????????????????????????? ???????????????????????const ??????? const ????????????????? ??????????н??? ???????????????? ???????????
???????????????? ??????????????? ????????? ??????? const ????? ????????????????????????????????????const