static void Main(string[] args)
{
double[] test2dArray = { 2, -4, 5 };
double[] testAnother2DArray = { 3, 5, 7, 2 };
MyPolynomial poly1 = new MyPolynomial(test2dArray);
MyPolynomial poly2 = new MyPolynomial(testAnother2DArray);
//Show the first polynomial
Console.WriteLine("The 1st polynomial: ");
poly1.ToString();
Console.WriteLine($"Degree: {poly1.GetDegree()} \n");
//Show the second polynomial
Console.WriteLine("The 2nd polynomial: ");
poly2.ToString();
Console.WriteLine($"Degree: {poly2.GetDegree()} \n");
//Polynomial 1 + polynomial 2
Console.WriteLine("Polynomial 1 + polynomial 2");
poly1.Add(poly2);
Console.WriteLine();
//Polynomial 1 * polynomial 2
Console.WriteLine("Polynomial 1 * polynomial 2");
poly1.Multiply(poly2);
Console.WriteLine();
Console.ReadLine();
}
public MyPolynomial Multiply(MyPolynomial another)
{
//Find the size of the new polynomial
int size = this._coeffs.Length + another._coeffs.Length - 1;
double[] array = new double[size];
MyPolynomial result = new MyPolynomial(array);
//Multiply each of them
for (int i = this._coeffs.Length - 1; i >= 0; i--)
{
//Mutyply the current position array
//With a line of another
for (int j = another._coeffs.Length - 1; j >= 0; j--)
{
array[i + j] += this._coeffs[i] * another._coeffs[j];
}
}
//Transfer the array to result
for (int i = (result._coeffs.Length - 1); i >= 0; i--)
{
result._coeffs[i] = array[i];
}
string resultAnother = "({0}*x^{1})";
resultAnother = string.Format(resultAnother, result._coeffs[result._coeffs.Length - 1], result._coeffs.Length - 1);
for (int i = (result._coeffs.Length - 2); i >= 0; i--)
{
resultAnother = string.Concat(resultAnother, " + (" + result._coeffs[i] + "*x^" + (i) + ")");
}
Console.WriteLine(resultAnother);
return(result);
}
public MyPolynomial Add(MyPolynomial another)
{
//Find the size of the new polynomial, this way I dont have to do 2 if statements
int size = (int)Max(this._coeffs.Length, another._coeffs.Length);
double[] array = new double[size];
MyPolynomial result = new MyPolynomial(array);
//Put the original array in
for (int i = this._coeffs.Length - 1; i >= 0; i--)
{
array[i] = this._coeffs[i];
}
//Then add another array
for (int i = another._coeffs.Length - 1; i >= 0; i--)
{
array[i] += another._coeffs[i];
}
//Transfer the array to result
for (int i = (result._coeffs.Length - 1); i >= 0; i--)
{
result._coeffs[i] = array[i];
}
string resultAnother = "({0}*x^{1})";
resultAnother = string.Format(resultAnother, result._coeffs[result._coeffs.Length - 1], result._coeffs.Length - 1);
for (int i = (result._coeffs.Length - 2); i >= 0; i--)
{
resultAnother = string.Concat(resultAnother, " + (" + result._coeffs[i] + "*x^" + (i) + ")");
}
Console.WriteLine(resultAnother);
return(result);
}
