public double MethodRectangle(BorderMethodRectangle border, double h) { double result = 0; for (double i = a; i <= b; i += h) { result += GetFunctionValue(i) * h; } return(result); }
static double MethodRectangle(BorderMethodRectangle border, string function, double a, double b, double h) { double result = 0; for (double i = a; i <= b; i += h) { result += MathParse(function, i) * h; } return(result); }