#include <iostream>
using namespace std;
 
struct counter{
#define COUNTER_MEMBER(TYPE,NAME) TYPE NAME;
COUNTER_MEMBER(int, a);
COUNTER_MEMBER(int, b);
};
 
 
int add_members(const counter &obj) {
  int sum = 0;
#define COUNTER_MEMBER(TYPE,NAME) sum += obj.NAME;
COUNTER_MEMBER(int, a);
COUNTER_MEMBER(int, b);
  return sum;  /* I hope there was no overflow */
}
 
int main() {
	counter obj;
	obj.a = 10;
	obj.b = 42;
	cout << add_members(obj) << endl;
	return 0;
}

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