#include <iostream>

int main()
{
    double x;

    cout << "Enter a number: ";
    cin >> x;

    // <= >= > < == !=
    if (x < 0)  // equivalent to (0 > x)
    {
        cout << "You can't take a square root of a negative number dummy\n";
        cout << "Go back to high school\n";
    }
    else // this is the same as saying "if (x >= 0)"
    {
        cout << "The square root of " << x << " is " << sqrt(x) << endl;
        cout << "The square of " << x << " is " << x*x << endl;
    }


    if (x == 0) // equivalent (0 == x)
    {
        cout << "You can't take the reciprocal of zero dummy\n";
    }
    else
    {
        cout << "The reciprocal of " << x << " is " << 1./x << endl;
    }
}