echo 1 + 3.5 | bc
awk "BEGIN {print 1+3.5; exit}"
python -c "print 1+3.5"
perl -e "print 1+3.5"
只需用变量替换数字,例如：echo $n1 $n2 |公元前
echo 1 + 3.5 | bc
awk "BEGIN {print 1+3.5; exit}"
python -c "print 1+3.5"
perl -e "print 1+3.5"
只需用变量替换数字,例如：echo $n1 $n2 |公元前
