public void OperatorSubtractTests(double[] firstCoefficients, double[] secondCoefficients, double eps)
{
PolynomialClass firstSummand = new PolynomialClass(firstCoefficients, eps);
PolynomialClass secondSummand = new PolynomialClass(secondCoefficients, eps);
double[] sumArray = new double[Math.Max(firstCoefficients.Count(), secondCoefficients.Count())];
for (int i = 0; i < sumArray.Count(); i++)
{
if (i < firstCoefficients.Count() && i < secondCoefficients.Count())
{
sumArray[i] = firstCoefficients[i] - secondCoefficients[i];
}
if (i > firstCoefficients.Count())
{
sumArray[i] = secondCoefficients[i];
}
if (i > secondCoefficients.Count())
{
sumArray[i] = firstCoefficients[i];
}
}
PolynomialClass sum = new PolynomialClass(sumArray, eps);
Assert.AreEqual(sum, firstSummand - secondSummand);
}
public void OperatorMultiplyTests(double[] firstCoefficients, double[] secondCoefficients, double eps)
{
PolynomialClass firstMultiplier = new PolynomialClass(firstCoefficients, eps);
PolynomialClass secondMultiplier = new PolynomialClass(secondCoefficients, eps);
double[] mulArray = new double[firstCoefficients.Count() * secondCoefficients.Count()];
for (int i = 0; i < firstCoefficients.Count(); i++)
{
if (Math.Abs(firstCoefficients[i]) > eps)
for (int j = 0; j<secondCoefficients.Count(); j++)
{
if (Math.Abs(secondCoefficients[j]) > eps)
{
mulArray[i + j] += firstCoefficients[i]*secondCoefficients[j];
}
}
}
PolynomialClass mul = new PolynomialClass(mulArray, eps);
Assert.AreEqual(mul, firstMultiplier * secondMultiplier);
}
public void GetHashCodeTests(double[] firstCoefficients, double[] secondCoefficients, double eps)
{
PolynomialClass firstPolynomial = new PolynomialClass(firstCoefficients, eps);
PolynomialClass secondPolynomial = new PolynomialClass(secondCoefficients, eps);
Assert.AreEqual(firstPolynomial.GetHashCode(), secondPolynomial.GetHashCode());
Assert.AreEqual(firstPolynomial, secondPolynomial);
}
static void Main(string[] args)
{
PolynomialClass p1 = new PolynomialClass(coefficients: new double[ ] { 10, 0, 0, -2.5, 9});
PolynomialClass p2 = new PolynomialClass(-11.11111111, 3, eps: 1E-4);
PolynomialClass p3 = p1 + p2;
PolynomialClass p4 = p1 + p1;
PolynomialClass p5 = p1 - p2;
PolynomialClass p6 = p1 - p1;
PolynomialClass p7 = p1*p2;
p6 = p6 + p6;
p6 = p6 - p6;
for (int i = -2; i<3; i++)
{
Console.WriteLine(p1.Calculate(i));//10-2.5x^3+9x^4
}
Console.WriteLine();
for (int i = -2; i < 3; i++)
{
Console.WriteLine(p2.Calculate(i));//-11.11111x^3
}
Console.WriteLine();
for (int i = -2; i < 3; i++)
{
Console.WriteLine(p3.Calculate(i));//10-13.6111x^3+9x^4
}
Console.WriteLine();
for (int i = -2; i < 3; i++)
{
Console.WriteLine(p4.Calculate(i));//20-5x^3+18x^4
}
for (int i = -2; i < 3; i++)
{
Console.WriteLine(p5.Calculate(i));//10+8.6111x^3+9x^4
}
for (int i = -2; i < 3; i++)
{
Console.WriteLine(p6.Calculate(i));//0
}
//GetHash for a+bx, a,b = [-100;100], step 0.05
List<int> hashes = new List<int>();
double[] coefficients;
//for(double coefficientDegree0 = -100; coefficientDegree0 < 100; coefficientDegree0 += 0.05)
//{
// for (double coefficientDegree1 = -100; coefficientDegree1 < 100; coefficientDegree1 += 0.05)
// {
// coefficients = new double[] {coefficientDegree0, coefficientDegree1};
// hashes.Add(new PolynomialClass(coefficients).GetHashCode());
// }
//}
//Console.WriteLine(hashes.Count() - hashes.Distinct().Count());
Random random = new Random();
for (int i = 0; i<10000000; i++)
{
coefficients = new double[random.Next(10) + 1];
for (int j = 0; j < coefficients.Count(); j++)
{
coefficients[j] = random.Next(20000) - 10000 + random.NextDouble();
}
hashes.Add(new PolynomialClass(coefficients).GetHashCode());
}
Console.WriteLine(hashes.Count() - hashes.Distinct().Count());
//Console.WriteLine(p1.GetHashCode());
//Console.WriteLine(p2.GetHashCode());
//Console.WriteLine(p3.GetHashCode());
//Console.WriteLine(p4.GetHashCode());
//Console.WriteLine(p5.GetHashCode());
//Console.WriteLine(p6.GetHashCode());
//Console.WriteLine(p7.GetHashCode());
Console.WriteLine();
Console.ReadLine();
}
public bool Equals(PolynomialClass polynomial)
{
if (polynomial == null)
{
return false;
}
foreach (PolynomItem item in _polynomial)
{
if (Math.Abs(polynomial.CoefficientNearDegree(item.Degree) - item.Coefficient) > 1E-6)
{
return false;
}
}
return true;
}
public static PolynomialClass operator *(PolynomialClass first, PolynomialClass second)
{
if (first == null || second == null)
{
throw new ArgumentNullException();
}
PolynomialClass result = new PolynomialClass(0,0);
foreach (PolynomItem itemFirst in first._polynomial)
{
PolynomItem[] resultArray = new PolynomItem[second._polynomial.Count()];
int resultIndex = 0;
foreach(PolynomItem itemSecond in second._polynomial)
{
resultArray[resultIndex] = new PolynomItem(
itemFirst.Degree + itemSecond.Degree,
itemFirst.Coefficient * itemSecond.Coefficient);
resultIndex++;
}
result = result + new PolynomialClass(resultArray, 1E-6);
}
return result;
}