CODEWITHSUNDEEP
c++methodsconstants
Ford Prefect
Ford Prefect

Reputation: 107

const at the end of one method giving error

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]

Upvotes: 0

Views: 62

Answers (1)

qeadz
qeadz

Reputation: 1516

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.

Upvotes: 3

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