#!/bin/bashread -t 30 -p "shu ru shu zi:" num1read -t 30 -p "shu ru shu zi:" num2read -t 30 -p "shu ru fu hao:" opeif [ -n "$num1" -a -n "$num2" -a -n "$ope"? ]?? then?? test1=$( echo $num1 | sed 's/[0-9]//g' )?? test2=$( echo $num1 | sed 's/[0-9]//g' )?? if [ -z "$test1" -a -z "$test2" ]???? then#!/bin/bashread -t 30 -p "shu ru shu zi:" num1read -t 30 -p "shu ru shu zi:" num2read -t 30 -p "shu ru fu hao:" opeif [ -n "$num1" -a -n "$num2" -a -n "$ope"? ]?? then?? test1=$( echo $num1 | sed 's/[0-9]//g' )?? test2=$( echo $num1 | sed 's/[0-9]//g' )?? if [ -z "$test1" -a -z "$test2" ]???? then?????? if [ "$ope" == '+' ]???????? then???????????? sum=$(($sum1+$sum2))?????? elif?[?"$ope"?==?'-'?]??????? ?then??????????? ?sum=$(($num1-$num2))?????? elif [ "$ope" == '*' ]??????? then???????????? sum=$(( $sum1 * $sum2 ))?????? elif [ "$ope" == '/' ]?????? then???????????? sum=$(( $sum1 / $sum2 ))? else?? echo "shu ru fu hao"?? exit 10?? fi??????????????????????????????????????????????????????? ?? else?? echo "shu ru shu zi"?? exit 11? fi? else? echo "shu ru zi fu"? fi? echo "$num1$ope$num2 : $sum"