/// <summary>
/// overloading operator - for normal subtraction of 2 polinomial
/// </summary>
/// <param name="p1">first polinomial in subtraction</param>
/// <param name="p2">second polinomial in subtraction</param>
/// <returns>Subtraction Polinomial</returns>
public static Polinomial operator -(Polinomial p1, Polinomial p2)
{
List <double> newCoef = new List <double>();
int maxDegree = (p1.degree > p2.degree) ? p1.degree : p2.degree;
int lenP1 = p1.coefs.Length;
int lenP2 = p2.coefs.Length;
for (int i = 0; i < maxDegree; i++)
{
if (i < lenP1 && i < lenP2)
{
newCoef.Add(p1.coefs[i] - p2.coefs[i]);
}
if (i >= lenP1)
{
newCoef.Add(0 - p2.coefs[i]);
}
if (i >= lenP2)
{
newCoef.Add(p1.coefs[i] - 0);
}
}
Polinomial newPol = new Polinomial(newCoef.ToArray(), maxDegree);
return(newPol);
}
/// <summary>
/// Overriding method Equals of 2 object
/// </summary>
/// <param name="obj">object whith which compare</param>
/// <returns>bool value of equity of polinomials</returns>
/// <exception cref="ArgumentNullException">if the object null</exception>
public override bool Equals(object obj)
{
if (obj == null)
{
throw new ArgumentNullException(nameof(obj));
}
Polinomial polin = obj as Polinomial;
return(this == polin);
}
/// <summary>
/// overloading operator * for normal multiplying of 2 polinomial
/// </summary>
/// <param name="p1">first polinomial in multiplying</param>
/// <param name="p2">second polinomial in multiplying</param>
/// <returns>multiplying Polinomial</returns>
public static Polinomial operator *(Polinomial p1, Polinomial p2)
{
int maxDegree = p1.getDegree() + p2.getDegree();
double[] coefP3 = new double[maxDegree + 1];
for (int i = p1.getDegree(); i >= 0; i--)
{
for (int j = p2.getDegree(); j >= 0; j--)
{
coefP3[i + j] += p1.getCoef()[i] * p2.getCoef()[j];
}
}
Polinomial p3 = new Polinomial(coefP3, maxDegree);
return(p3);
}
