Linux Shell中浮点运算方式
Linux Shell中浮点运算方式
用bc或awk
$a=3.4 b=345.3
echo "scale=4;$a*$b/2"|bc
587.0100
$echo $a*$b/2|bc -l
587.01000000000000000000
$awk 'BEGIN{printf '$a'*'$b'/2}'
587.01
用bc或awk
$a=3.4 b=345.3
echo "scale=4;$a*$b/2"|bc
587.0100
$echo $a*$b/2|bc -l
587.01000000000000000000
$awk 'BEGIN{printf '$a'*'$b'/2}'
587.01
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