using namespace std;

​

void Shift(int, int);

void Shift(int, int, int);

void Shift(int, int, int, int);

​

int main(void)

{

    Shift(1, 2);

    Shift(1, 2, 3);

    Shift(1, 2, 3, 4);

    return 0;

}

​

void Shift(int a, int b)

{

    int temp;

    temp = a;

    a = b;

    b = temp;

    cout << a << ", " << b << endl;

}

​

void Shift(int a, int b, int c)

{

    int temp;

    temp = a;

    a = b;

    b = c;

    c = temp;

    cout << a << ", " << b << ", " << c << endl;

}

​

void Shift(int a, int b, int c, int d)

{

    int temp;

    temp = a;

    a = b;

    b = c;

    c = d;

    d = temp;

    cout << a << ", " << b << ", " << c << ", " << d << endl;

}