We will do reasonably short assignment this week. As discussed in the class, write the code for the following function. Do NOT do Google search right away and cheat yourself out of learning experience! Since the code is reasonably small, you can copy swap() into Comments box and submit this assignment.
void swap(int &x, int &y) {
    //your code!
}

main() {
    int a = 5, b = 10;
    swap(a, b);
    cout << a << " " << b << endl;
    //it should output 10 5
}