英文:
Divide 2 big.Floats in go and preserve the resulting decimal
问题
我在Go语言中有两个big.Float类型的数字。
- x. 93214.310998100256907925
- y. 1.954478300965909786
我想找出x和y的百分比，应该大约是0.0020967578%。问题在于，当将这两个big float相除时，答案总是0.xxx，但该方法返回的是2.09675776180520477879426e-05。有什么办法可以解决这个问题吗？我尝试过将其转换为字符串再转回来，但这只是另一个我无法解决的问题。我觉得可能有一种方法可以做到这一点，但我可能忽略了。如果需要，我只需要保留7位小数精度。
英文:
I have 2 big.Float numbers in go.
- x. 93214.310998100256907925
- y. 1.954478300965909786
I want to find out what percent of x y is. This should be around 0.0020967578%. The issue comes when dividing these 2 big floats the answer is always 0.xxx but the method returns 2.09675776180520477879426e-05. Any ideas to fix this? I have tried converting to a string then back but that isn't another rabbit hole I won't include because I wasn't able to accomplish anything with it. I feel like there is a method to do this I am missing. I really only need 7 decimals of precision of that helps.
答案1
得分: 1
你为什么需要big.Float？即使使用float32似乎也可以满足需求：
package main
import "fmt"
func percent(y, x float32) float32 {
return y / x * 100
}
func main() {
p := percent(1.954478300965909786, 93214.310998100256907925)
fmt.Println(p) // 0.0020967575
}
英文:
Why do you need big.Float? Even float32 seem to be fine:
package main
import "fmt"
func percent(y, x float32) float32 {
return y / x * 100
}
func main() {
p := percent(1.954478300965909786, 93214.310998100256907925)
fmt.Println(p) // 0.0020967575
}
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