public CalculationResult Calculate(Func func, double begin, double end, double accuracy)
{
var sign = Math.Sign(end - begin);
double[] temp = {Math.Min(begin, end), Math.Max(begin, end)};
begin = temp[0];
end = temp[1];
var segments = InitialSegments/2;
var res = double.PositiveInfinity;
double prevRes;
do {
prevRes = res;
segments *= 2;
var h = (end - begin)/segments;
res = (func.Calculate(begin) + func.Calculate(end))/2;
for(var i = 1; i <= segments - 1; i++) {
res += func.Calculate(begin + h*i);
}
res *= h;
} while((Math.Abs(res - prevRes))/3 > accuracy);
var acc = (Math.Abs(res - prevRes)) / 3;
res *= sign;
return new CalculationResult(res, segments, acc);
}
public Func(string mathNotation, Func<double, double> function)
{
_mathNotation = mathNotation;
_function = function;
}