public static void AddDiffPrintTest()
{
Console.WriteLine("########## PART 6 ############");
Console.WriteLine();
int[] coefficientsOne = { 4, -5, 1, 0 };
int[] coefficientsTwo = { 1, 1, 0, 1 };
var polyOne = new Polynomial(coefficientsOne);
var polyTwo = new Polynomial(coefficientsTwo);
Console.Write("Polynomial 1: ");
polyOne.ToString();
Console.Write("Polynomial 2: ");
polyTwo.ToString();
Console.Write("Sum: ");
polyOne.Sum(polyTwo).ToString();
Console.Write("Difference: ");
polyOne.Difference(polyTwo).ToString();
coefficientsOne = new int[] { 4, -5, 1 };
coefficientsTwo = new int[] { 4, -5, -1 };
polyOne = new Polynomial(coefficientsOne);
polyTwo = new Polynomial(coefficientsTwo);
Console.Write("Polynomial 1: ");
polyOne.ToString();
Console.Write("Polynomial 2: ");
polyTwo.ToString();
Console.Write("Sum: ");
polyOne.Sum(polyTwo).ToString();
Console.Write("Difference: ");
polyOne.Difference(polyTwo).ToString();
}
public Polynomial[] Divide(Polynomial polynomial)
{
var newLength = coefficients.Length;
var quotient = new Polynomial(new int[newLength]);
var dividend = this;
var divisorGreatestPower = polynomial.GreatestPower();
var dividendGreatestPower = dividend.GreatestPower();
//only divide if divisable
while (dividendGreatestPower >= divisorGreatestPower)
{
var powerNeeded = dividendGreatestPower - divisorGreatestPower;
var coefficientNeeded = dividend.coefficients[dividendGreatestPower] / polynomial.coefficients[divisorGreatestPower];
//correct sign
coefficientNeeded = dividend.coefficients[dividendGreatestPower] > 0 ? Math.Abs(coefficientNeeded) : -1 * Math.Abs(coefficientNeeded);
//build new polynomial
var quotientCoefficient = new int[newLength];
quotientCoefficient[powerNeeded] = coefficientNeeded;
var partialQuotient = new Polynomial(quotientCoefficient);
//add onto the quotient
quotient = quotient.Sum(partialQuotient);
//multiply new quotient into divisor and subtract from current
//dividend for new dividend
dividend = dividend.Difference(polynomial.Product(partialQuotient));
//calculate top power of new dividend.
dividendGreatestPower = dividend.GreatestPower();
}
return(new Polynomial[] { quotient, dividend });
}