标签:sp bs ef as return ca nbsp public c
在某些情况下有误差
public static int Sqrt(int a)
	{
		switch (a)
		{
			case 0:
				return 0;
			case 1:
			case 2:
			case 3:
				return 1;
			default:
				int n = a / 2;
				int m = (n + a / n) / 2;
				while (n > m)
				{
					n = m;
					m = (n + a / n) / 2;
				}
				return m;
		}
	}
标签:sp bs ef as return ca nbsp public c
原文地址:http://www.cnblogs.com/Asuphy/p/4042718.html