#! /bin/bash
if [ $# -ne 2 ];then
echo "please input two arguments:"
exit 2
fi
expr $1 + 2 &>/dev/null
if [ $? -ne 0 ];then
echo "please input int."
exit 3
fi
expr $2 + 3 &>/dev/null
if [ $? -ne 0 ];then
echo "please input int."
exit 4
fi
echo "$1+$2 is $(($1+$2))"
echo "$1$2 is $(($1$2))"
echo "$1-$2 is $(($1-$2))"
echo "$1/$2 is $(($1/$2))"
免责声明：本站发布的内容（图片、视频和文字）以原创、转载和分享为主，文章观点不代表本网站立场，如果涉及侵权请联系站长邮箱：is@yisu.com进行举报，并提供相关证据，一经查实，将立刻删除涉嫌侵权内容。
