using System;

namespace TransformerToWords
{
    /// <summary>
    /// Implements transformer class.
    /// </summary>
    public class Transformer
    {
        /// <summary>
        /// Transforms each element of source array into its 'word format'.
        /// </summary>
        /// <param name="source">Source array.</param>
        /// <returns>Array of 'word format' of elements of source array.</returns>
        /// <exception cref="ArgumentNullException">Thrown when array is null.</exception>
        /// <exception cref="ArgumentException">Thrown when array is empty.</exception>
        /// <example>
        /// new[] { 2.345, -0.0d, 0.0d, 0.1d } => { "Two point three four five", "Minus zero", "Zero", "Zero point one" }.
        /// </example>
        public string[] Transform(double[]? source)
        {
            throw new NotImplementedException("You need to implement this method.");
        }
    }
}