What will be the output of the following C++ code?

#include <iostream>
using namespace std;
class Car
{
    public:
    int speed;
};
int main()
{
    int Car :: *pSpeed = &Car :: speed;
    Car c1;
    c1.speed = 1;           
    cout << c1.speed << endl;
    c1.*pSpeed = 2;     
    cout  << c1.speed << endl;
    return 0;
}