#!/bin/bash


read -p "请输入身高（m）:" HIGHT
if [[ ! "${HIGHT}" =~ ^[0-2](\.[0-9]{1,2})?$ ]];then
	echo "请输入正确身高,最多保留小数点后两位"
	exit 1
fi
read -p "请输入体重（kg）" WEIGHT
if [[ ! "${WEIGHT}" =~ ^([0-9]{1,2})?[0-9](\.[0-9]{1,2})?$ ]];then
        echo "请输入正确体重，最多保留小数点后两位"
        exit 2
fi
BIM=`echo "${WEIGHT}" "/" "${HIGHT}"^2 | bc`

if [[ "${BIM}" -le "18" ]] ;then
	echo "体重过轻"
	elif [[ "${BIM}" -le 25 ]];then
		echo "体重正常"
		elif [[ "${BIM}" -le 30 ]];then
			echo"体重超重"
				else
				echo "肥胖"
exit
fi