Const functions returning const

[lostromos]

Hello all,

const int function() const;

This function returns a const int. I'm ok with that. What's the use of the second "const"? I didnt find the answer in standard C/C++ manuals, so i felt the need to disturb you one more.

Thanks a lot in advance

[Valmont]

It means that the function function() is not allowed to modify any members.

class ConstTest
{
public:
   string a_;
   void print() const
   {
      a_ =  "Hi Iostromos!"; //ILLEGAL. const qualifier forbids modifying members.
      std::cout<<"a_"<<std::endl;
   }
};