role of const

[amitk3553]

Please explain the role of const in both code portions
and role of *this as this points to member of parent class.

1)  int name() const
    {}

2)  void study(const data_type& add_value){(*this)->write( ad_value ); }

Regards
cam

[keskiverto]

That sounds like a homework question. Besides, the code fragment lacks context; these must be member functions. Furthermore, there might be a syntax error (impossible to say without knowing the classes).

Overall, you should know what a const variable is and what a reference parameter is. Then expand to member functions of a const object and restriction const sets on the use of a reference parameter, respectively.