public INumber Subtract(INumber obj)
{
IntegerNumber right = obj as IntegerNumber;
if (right == null)
{
throw new InvalidCastException();
}
return(new IntegerNumber(this.Number - right.Number));
}
public INumber Divide(INumber obj)
{
IntegerNumber right = obj as IntegerNumber;
if (right == null)
{
throw new InvalidCastException();
}
if (right.Number == 0)
{
throw new DivideByZeroException();
}
return(new IntegerNumber(this.Number / right.Number));
}
public int CompareTo(INumber other)
{
IntegerNumber comparable = other as IntegerNumber;
if (comparable == null)
{
throw new InvalidCastException();
}
if (this.Number > comparable.Number)
{
return(1);
}
else if (this.Number < comparable.Number)
{
return(-1);
}
return(0);
}
static void Main(string[] args)
{
try
{
INumber[] integerArray = Utils.CreateArrayOfType <IntegerNumber>(Utils.GetArrayLength());
var integerArrayCopy = Task.CloneArray(integerArray);
Task.SortAscending(integerArrayCopy);
IntegerNumber integerSum = Task.Sum(integerArrayCopy) as IntegerNumber;
IntegerNumber integerMultiplying = Task.Multiplying(integerArrayCopy) as IntegerNumber;
IntegerNumber integerAvgNumber = Task.AvgNumber(integerArrayCopy) as IntegerNumber;
Utils.MultiParamsFormatOutput(integerSum, integerMultiplying, integerAvgNumber);
INumber[] rationalArray = Utils.CreateArrayOfType <RationalNumber>(Utils.GetArrayLength());
var rationalArrayCopy = Task.CloneArray(rationalArray);
Task.SortDescending(rationalArrayCopy);
RationalNumber rationalSum = Task.Sum(rationalArrayCopy) as RationalNumber;
RationalNumber rationalMultiplying = Task.Multiplying(rationalArrayCopy) as RationalNumber;
RationalNumber rationalAvgNumber = Task.AvgNumber(rationalArrayCopy) as RationalNumber;
Utils.MultiParamsFormatOutput(rationalSum, rationalMultiplying, rationalAvgNumber);
}
catch (ArithmeticException e)
{
Console.WriteLine(e.Message);
}
catch (InvalidCastException e)
{
Console.WriteLine(e.Message);
}
catch (ArgumentException e)
{
Console.WriteLine(e.Message);
}
catch (Exception e)
{
Console.WriteLine("Something bad happend : " + e.Message);
}
Console.ReadKey();
}
public static INumber Multiplying(INumber[] arr)
{
INumber mul = null;
if (Array.TrueForAll(arr, item => item is RationalNumber))
{
mul = new RationalNumber(1, 1);
}
else if (Array.TrueForAll(arr, item => item is IntegerNumber))
{
mul = new IntegerNumber(1);
}
else
{
throw new ArgumentException("cannot calculate sum of array which elements are of different types");
}
foreach (var item in arr)
{
mul = mul.Multiply(item);
}
return(mul);
}
public static INumber Sum(INumber[] arr)
{
INumber sum = null;
if (Array.TrueForAll(arr, item => item is RationalNumber))
{
sum = new RationalNumber();
}
else if (Array.TrueForAll(arr, item => item is IntegerNumber))
{
sum = new IntegerNumber();
}
else
{
throw new ArgumentException("cannot calculate sum of array which elements are of different types");
}
foreach (var item in arr)
{
sum = sum.Add(item);
}
return(sum);
}
