public static double getRoot(Function f, double from, double to, double precision)
{
// если значения функции на концах отрезка не разных знаков
if (Math.Sign(f.getValue(from)) * Math.Sign(f.getValue(to)) > 0)
throw new Exception("Values of func have not same char");
double middle = (from + to) / 2;
while (Math.Abs(f.getValue(middle)) > precision)
{
if (Math.Sign(f.getValue(from)) * Math.Sign(f.getValue(middle)) < 0)
{
to = middle;
}
if (Math.Sign(f.getValue(middle)) * Math.Sign(f.getValue(to)) < 0)
{
from = middle;
}
middle = (from + to) / 2;
}
return middle;
}
