AddSubPoly.java/title>
</head>
<p>
/**
* Write a description of class AddSubPoly here.
*
* @author (your name)
* @version (a version number or a date)
*/
public class AddSubPoly extends DiffPoly
{
public AddSubPoly(String variable)
{
super(variable);
}
public AddSubPoly(String variable, double[] newcoeffs)
{
super(variable, newcoeffs);
}
public AddSubPoly add(DiffPoly poly)
{
if (this.variable.equals(poly.variable))
{
if (this.coeffs.length == 1)
{
double[] tempcoeffs = new double[poly.coeffs.length];
for (int i = poly.coeffs.length - 1; i >= 0; i--)
tempcoeffs[i] = poly.coeffs[i];
tempcoeffs[3] += this.coeffs[0];
return new AddSubPoly(variable, tempcoeffs);
}
else if (poly.coeffs.length == 1)
{
double[] tempcoeffs = new double[this.getDegree()];
for (int i = this.getDegree() - 1; i >= 0; i--)
tempcoeffs[i] = this.coeffs[i];
tempcoeffs[3] += poly.coeffs[0];
return new AddSubPoly(variable, tempcoeffs);
}
else if (this.getDegree() > poly.getDegree())
{
double[] tempcoeffs = new double[this.getDegree()];
for (int i = this.getDegree(); i >= 0; i--)
tempcoeffs = this.coeffs;
return new AddSubPoly(variable, tempcoeffs);
}
else if (this.getDegree() < poly.getDegree())
{
double[] tempcoeffs = new double[poly.getDegree()];
for (int i = this.getDegree(); i >= 0; i--)
tempcoeffs[i] = poly.coeffs[i] + this.coeffs[i];
return new AddSubPoly(variable, tempcoeffs);
}
else if (this.getDegree() == poly.getDegree())
{
double[] tempcoeffs = new double[this.coeffs.length];
for (int i = this.coeffs.length - 1; i >= 0; i--)
tempcoeffs[i] = poly.coeffs[i] + this.coeffs[i];
if (tempcoeffs[3] == 0.0)
{
double[] shorter = new double[tempcoeffs.length - 1];
for (int i = shorter.length - 1; i >= 0; i--)
shorter[i] = tempcoeffs[i];
if ((shorter[0] == 0.0) && (shorter[1] == 0.0) && (shorter[2] == 0.0))
return new AddSubPoly(variable);
return new AddSubPoly(variable, shorter);
}
return new AddSubPoly(variable, tempcoeffs);
}
}
else
throw new IllegalArgumentException();
return new AddSubPoly(variable);
}
public AddSubPoly sub(DiffPoly poly)
{
double[] temp2 = new double[poly.coeffs.length];
for (int i = poly.coeffs.length - 1; i >= 0; i--)
temp2[i] = -1 * poly.coeffs[i];
//AddSubPoly poly1 = new AddSubPoly(this.variable, this.coeffs);
AddSubPoly poly2 = new AddSubPoly(poly.variable, temp2);
AddSubPoly result = this.add(poly2);
return result;
}
}
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