#include <iostream>

using namespace std;

struct myStruct {
  public:
    int Sum(int i, int j) const{
        return (i + j);
    }
};

template <typename Func>
int my_functor(Func f, int i, int j){
    f(i, j);
}

int main()
{
    myStruct A;
    auto p = [&A](int i, int j){
        cout << A.Sum(i, j) << endl;
    };

    my_functor(p, 10, 20);

    return 0;
}