MySqrt

gistfile1.cpp

	double Sqrt(const double &o)
	{
		double s = o;
		double t;
		if(o == 0)
		{
			return 0;
		}
		do
		{
			t = s;
			s = (t + o / t) / 2;
		}
		while(s < t);
		return t;
	}