Math.sqrt()方法的测试

最新推荐文章于 2024-06-06 14:22:37 发布

deyu1028

最新推荐文章于 2024-06-06 14:22:37 发布

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public class MathSqrtTestDemo
{
	public static void main(String[] args)
	{
		for (double x = 50.0;x <60.0; x++)
		{
			double y = Math.sqrt(x);
			double z = sqrt(x);
			System.out.println(y+"\t"+y*y);
			System.out.println(z);
		}
	}
	public static double sqrt(double x)
	{
		final double EPSILON = 1e-14;
		if (x <= 0)
			return 0;
		double y = 1.0;
		while (Math.abs(y*y-x) > EPSILON )
			y = (y + x/y)/2;
		return y;
	}
}