bash shell 脚本中的浮点数
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float numbers in bash shell script
提问by arsenal
Possible Duplicate:
Division in script and floating-point
可能的重复：
脚本和浮点除法
Mismatch Percentage: $((( 100 * $TEST2 ) / $TEST1))
I am trying to get float number from above code. I am using bash shell script. But the above code is not giving me float numbers. I guess bash does not support floating numbers
我试图从上面的代码中获取浮点数。我正在使用 bash shell 脚本。但是上面的代码没有给我浮点数。我猜 bash 不支持浮点数
回答by Rody Oldenhuis
Shameless steal from VaughnCato:
从 VaughnCato 无耻的偷窃：
echo "Mismatch Percentage: $(echo "100*$TEST2/$TEST1" | bc -l)"
回答by Bernhard
I have defined a function in ~./bashrc
我已经定义了一个函数 ~./bashrc
function bashCalc ()
{
bc <<< "scale=6;";
}
Now you can always use in your (sub)shell:
现在你总是可以在你的（子）shell 中使用：
Mismatch Percentage: $(bashCalc (100*$TEST2)/$TEST1 )
另见：https: //unix.stackexchange.com/questions/40786/how-can-i-do-command-line-integer-float-calculations-in-bash-or-any-language
