int & getData(Test * test) //const
{
 return (int &)test->data;
}

int main()
{
 Test *test = new Test();
 test->data = 100;
 test->flag = 0;

 cout<<test->data<<"  "<<test->flag<<endl;
 getData(test) = 999;
 cout<<test->data<<"  "<<test->flag<<endl;
 Sleep(1000);
 return 0;
}
*/

class Test {
public:
 int data;
 int flag;
public:
 int & getData(Test * test) const;
};

int & Test::getData(Test * test) const
{
 return (int &)test->data;
}

int main()
{
 Test *test = new Test();
 test->data = 100;
 test->flag = 0;

 cout<<test->data<<"  "<<test->flag<<endl;
 test->getData(test) = 999;
 cout<<test->data<<"  "<<test->flag<<endl;
 Sleep(1000);
 return 0;
}