ToString(string baseVariable)
{
StringBuilder builder = new StringBuilder();
for (int i = Order; i >= 0; i--)
{
Complex coeff = _coefficients[i];
if (coeff.IsZero)
{
continue;
}
if (!coeff.IsReal)
{
builder.Append(builder.Length > 0 ? " + (" : "(");
builder.Append(coeff.ToString());
builder.Append(')');
}
else
{
double realCoeff = coeff.Real;
if (builder.Length > 0)
{
builder.Append(realCoeff > 0d ? " + " : " - ");
}
else
{
if (realCoeff < 0d)
{
builder.Append('-');
}
}
if (i == 0 || (!Number.AlmostEqual(realCoeff, 1) && !Number.AlmostEqual(realCoeff, -1)))
{
builder.Append(Math.Abs(realCoeff));
}
}
if (i > 0)
{
builder.Append(" " + baseVariable);
}
if (i > 1)
{
builder.Append('^');
builder.Append(i);
}
}
if (builder.Length == 0)
{
builder.Append('0');
}
return(builder.ToString());
}
/// <summary>
/// Testing the method <see cref="Complex.ToString"/>
/// </summary>
[Test] public void ToStringTest()
{
for (int i = 0; i < 100; i++)
{
Complex c = new Complex(2 * random.NextDouble() - 1,
2 * random.NextDouble() - 1);
string s = c.ToString();
Assertion.AssertEquals("#A00 Unexpected parse result.", c, Complex.Parse(s));
}
}
