/// <summary>
/// Adds a complex number and a scalar value.
/// </summary>
///
/// <param name="a">A <see cref="Complex"/> instance.</param>
/// <param name="s">A scalar value.</param>
///
/// <returns>Returns new <see cref="Complex"/> instance containing the sum.</returns>
///
public static Complex operator +(double s, Complex a)
{
return(Complex.Add(a, s));
}