const at the end of one method giving error

Question

I don't understand why I get error with che const at the end of my method. The method print doesn't change any class member, right?

class Hello{

public:
   int get_member() {return member_;};
   void print() const {
       cout<<get_member()<<endl; 
   };

private:
   int member_;

 };

The error message is: error passing "const Hello" as "this" argument of 'int Hello:: get_member()' discards qualifiers [-fpermissive]

Answer 1

int get_member() const {return member_;}

Should fix it. You can't call a non-const member from a const member as it breaks the 'promise' of const. If you could there would be no guarantee that the object isn't modified during the call.