#include <iostream>
#include <cstdlib>
#include <cstring>
using namespace std;


struct Test {
    int a;
    int b;
    int c;
    Test() : a(0), b(0), c(0) {}
    Test operator+(const Test &rhs) const;
};

Test Test::operator+(const Test &rhs) const
{
    Test res, nores;
    // cannot print the content of res (uninitialized), but nores is right.
    res.a = a + rhs.a;
    res.b = b + rhs.b;
    res.c = c + rhs.c;
    return res;
}
ostream &operator<<(ostream &out, const Test &a)
{
    out << a.a << ' ' << a.b << ' ' << a.c << endl;
}

int main()
{
    Test p1, p2;
    cout << p1 + p2 << endl;

    return 0;
}