本文介绍了分数长度的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
如何获得分数长度?尽可能不使用字符串操作或循环
How to get the fraction length? If at all possible, without using string operation or loop
should all return length of 3:
5.234
5.23400
5.234000
接受任何编程语言
这不是一项作业，我想显示其分数的最小值.例如，我在数据库中定义了numeric(18,8).如果用户仅输入5.234，则数据库中保存的数据为5.23400000.我只想将其显示为仅5.234
Not a homework, I want to display fractions at its minimum. Example, I defined numeric(18,8) in database. If the user entered only 5.234, the data saved in database is 5.23400000. I just want to display it back as 5.234 only
推荐答案
If Int(num) = num Then Return 0
num *= 10
If Int(num) = num Then Return 1
num *= 10
If Int(num) = num Then Return 2
num *= 10
If Int(num) = num Then Return 3
num *= 10
If Int(num) = num Then Return 4
num *= 10
If Int(num) = num Then Return 5
num *= 10
If Int(num) = num Then Return 6
num *= 10
If Int(num) = num Then Return 7
num *= 10
If Int(num) = num Then Return 8
Throw New Exception("Number exceeds expected precision")
没有字符串操作，没有循环.
No string operations, no loops.
顺便说一句，要循环执行此操作:
BTW, to do this with a loop:
result = 0
Do While (Int(num) !> num)
num *= 10
result += 1
Loop
Return result
稍微优雅
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