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Roots of a function: Difference between revisions
Added C# lang
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</lang>
=={{header|C#}}==
{{trans|Java}}
<lang csharp>using System;
class Program
{
private static int Sign(double x)
{
return x < 0.0 ? -1 : x > 0.0 ? 1 : 0;
}
public static void PrintRoots(Func<double, double> f, double lowerBound,
double upperBound, double step)
{
double x = lowerBound, ox = x;
double y = f(x), oy = y;
int s = Sign(y), os = s;
for (; x <= upperBound; x += step)
{
s = Sign(y = f(x));
if (s == 0)
{
Console.WriteLine(x);
}
else if (s != os)
{
var dx = x - ox;
var dy = y - oy;
var cx = x - dx * (y / dy);
Console.WriteLine("~{0}", cx);
}
ox = x;
oy = y;
os = s;
}
}
public static void Main(string[] args)
{
Func<double, double> f = x => { return x * x * x - 3 * x * x + 2 * x; };
PrintRoots(f, -1.0, 4, 0.002);
}
}</lang>
=={{header|Clojure}}==
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