Function quartic_root

Source Code/19-13.rs:14–17

(x: Number)

        fn sqrt(self) -> Self { self.sqrt() }
    }
    fn quartic_root<Number>(x: Number) -> Number
    where Number: HasSquareRoot {
        x.sqrt().sqrt()
    }
    sqrt();
    print!("{} {}",
        quartic_root(100f64),