using System;

public class DecimalCounter

{

    public static void Main()

    { 

        DecimalCounter_FiveElementsTwoRanges_ReturnsResult();

    }

    public static int GetDecimalsCount(decimal[] arrayToSearch, decimal[][] ranges)

{

    if (arrayToSearch == null)

    {

        throw new ArgumentNullException();

    }

    else if (ranges == null)

    {

        throw new ArgumentNullException();

    }

    else

    {

        int sum = 0;

        for (int i = 0; i < arrayToSearch.Length; i++)

        {

            for (int j = 0; j < ranges.Length; j++)

            {

                    if (arrayToSearch[i] >= ranges[j][0] && arrayToSearch[i] <= ranges[j][1])

                    {

                        sum++;

                }

            }

        }

​

        return sum;

    }

    }

​

    private static readonly decimal[] ArrayWithFiveElements = { 0.1m, 0.2m, 0.3m, 0.4m, 0.5m };

private static readonly decimal[] ArrayWithFifteenElements = { decimal.MaxValue, -0.1m, -0.2m, decimal.One, -0.3m, -0.4m, -0.5m, decimal.Zero, 0.1m, 0.2m, 0.3m, 0.4m, 0.5m, decimal.MinusOne, decimal.MinValue };

​

​

public static void DecimalCounter_FiveElementsOneRange_ReturnsResult()

{

    // Arrange

    decimal[][] ranges =

    {

        new[] { 0.1m, 0.2m },

    };

​

    // Act

    int actualResult = DecimalCounter.GetDecimalsCount(ArrayWithFiveElements, ranges);

​

    // Assert

    Console.WriteLine( actualResult);

}

​

​

public static void DecimalCounter_FiveElementsTwoRanges_ReturnsResult()

{

    // Arrange

    decimal[][] ranges =

    {

        new[] { 0.1m, 0.2m },

        new[] { 0.4m, 0.5m },

    };

​

    // Act

    int actualResult = DecimalCounter.GetDecimalsCount(ArrayWithFiveElements, ranges);

​

    // Assert

    Console.WriteLine(actualResult);

}

}