Bash Division保持0 [重复](Bash Division Keeps giving 0 [duplicate])

Bash Division保持0 [重复](Bash Division Keeps giving 0 [duplicate])

这个问题在这里已有答案：

如何在bash中使用浮点除法？ 11个答案

我知道bash不支持长时间划分，这个问题可能会被归结为地狱，但在这里它会发生。 我查找了一个bash work-around给了我一个假设的数值。 例如，这就是我得到的：

#!/bin/bash SMALL_NUMBER=4 LARGE_NUMBER=56100 MATH_PROBLEM=$((100*$SMALL_NUMBER/$LARGE_NUMBER)) echo $MATH_PROBLEM

我执行代码，输出总是0.我认为将表达式乘以100将解决这个问题，但显然不是。 有人能告诉我这是怎么回事吗？

This question already has an answer here:

How do I use floating-point division in bash? 14 answers

I know bash doesn't support long division and this question is probably going to be downvoted to hell, but here it goes. I looked up a bash work-around to giving me a supposed numeric value for the division. For example, this is what I got:

#!/bin/bash SMALL_NUMBER=4 LARGE_NUMBER=56100 MATH_PROBLEM=$((100*$SMALL_NUMBER/$LARGE_NUMBER)) echo $MATH_PROBLEM

I execute the code and the output is always 0. I thought multiplying the expression by 100 would fix this but apparently not. Can someone tell me what is going on with this?

最满意答案

Bash只做整数，而不是浮点数; 您必须将任务委派给诸如bc的工具

Bash only does integers, not floats; you must delegate the task to a tool such as bc