go语言实现sqrt的方法
时间:2021-09-27 09:43:57|栏目:Golang|点击: 次
本文实例讲述了go语言实现sqrt的方法。分享给大家供大家参考。具体实现方法如下:
复制代码 代码如下:
package mymath
import "math"
func InvSqrt(x float32) float32 {
var xhalf float32 = 0.5*x // get bits for floating VALUE
i := math.Float32bits(x) // gives initial guess y0
i = 0x5f375a86 - (i>>1) // convert bits BACK to float
x = math.Float32frombits(i) // Newton step, repeating increases accuracy
x = x*(1.5-xhalf*x*x)
x = x*(1.5-xhalf*x*x)
x = x*(1.5-xhalf*x*x)
return 1/x
}
import "math"
func InvSqrt(x float32) float32 {
var xhalf float32 = 0.5*x // get bits for floating VALUE
i := math.Float32bits(x) // gives initial guess y0
i = 0x5f375a86 - (i>>1) // convert bits BACK to float
x = math.Float32frombits(i) // Newton step, repeating increases accuracy
x = x*(1.5-xhalf*x*x)
x = x*(1.5-xhalf*x*x)
x = x*(1.5-xhalf*x*x)
return 1/x
}
希望本文所述对大家的Go语言程序设计有所帮助。