C++ Operator Overloading Interview Question:

Output of Program?

#include <iostream>
using namespace std;
class sample
{
public:
int x, y;
sample() {};
sample(int, int);
sample operator + (sample);
};
sample::sample (int a, int b)
{
x = a;
y = b;
}
sample sample::operator+ (sample param)
{
sample temp;
temp.x = x + param.x;
temp.y = y + param.y;
return (temp);
}
int main ()
{
sample a (4,1);
sample b (3,2);
sample c;
c = a + b;
cout << c.x << "," << c.y;
return 0;
}
a) 5, 5
b) 7, 3
c) 3, 7
d) None of the mentioned