我怎样才能让Haskell以科学记数法输出数字？ [英] How do I get to haskell to output numbers NOT in scientific notation?

问题描述

 
 
我有一些项目，我想分区到一些桶，这样每个桶是比最后一个分数大一些。  items = 500 
 chunks = 5 
 increment = 0.20 
 
 
 { - 找到比例 - } 
 sizes = take chunk （迭代（+增量）1）
基数=总和大小/项目
存储区=地图（基本*）大小
 
 main =打印存储区
  

我确信有一个数学上更优雅的方法来做到这一点，但这不是我的问题。
结束步骤始终以科学记数法打印出来。

如何获得普通的十进制输出？我查看了数字包，但

解决方案

试试 printf 。例如：

 > import Text.Printf 
> printf％d \\\
（23 :: Int）
 23 
> printf％s％s \\\
HelloWorld
 Hello World 
> printf％.2f\\\
pi 
 3.14 
  

I have a some items that I want to partition in to a number of buckets, such that each bucket is some fraction larger than the last.

items = 500
chunks = 5
increment = 0.20


{- find the proportions  -}
sizes = take chunks (iterate (+increment) 1)    
base = sum sizes / items    
buckets = map (base *) sizes

main = print buckets

I'm sure there is a mathematically more elegant way to do this, but that's not my question. The end step is always printing out in scientific notation.

How do I get plain decimal output? I've looked at the Numeric package but I'm getting nowhere fast.

解决方案

Try printf. e.g.:

> import Text.Printf
> printf "%d\n" (23::Int)
23
> printf "%s %s\n" "Hello" "World"
Hello World
> printf "%.2f\n" pi
3.14

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