#include <iostream>

class CSample
{
public:
        void set(int num);
        int get();
        void add(int a, int b);
private:
        int m_num;
};

int main()
{
        CSample obj;
        int num;

        std::cout << "type in number " << std::endl;
        std::cin >> num;   //std::cin >> obj.m_num is not allowed
        obj.set( num );
        obj.add( obj.get(), 1);
        std::cout << obj.get() << std::endl;

        return 0;


void CSample::set(int num)

       m_num = num;


void CSample::add(int a, int b)

       m_num = a + b;


int CSample::get()

       return m_num;