每日shell脚本四——鸡兔同笼

[root@qiang ~]#vim rc.sh

#!/bin/bash
head=$1
foot=$2
rabbit=$[(foot-head-head)/2]
chook=$[head-rabbit]
echo "兔子:$rabbit只"
echo "鸡:$chook只"

[root@qiang ~]# bash rc.sh 30 80
兔子:10只
鸡:20只