                        课程
                    
                        /运维&测试
                        
                            /Linux
                        
                        /shell编程之条件判断与流程控制

帮忙看看哪错了，一直提示运算符行出错

#!/bin/bash
read -t 30 -p "shu ru shu zi:" num1
read -t 30 -p "shu ru shu zi:" num2
read -t 30 -p "shu ru fu hao:" ope
if [ -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 "$test2" ]
     then
#!/bin/bash
read -t 30 -p "shu ru shu zi:" num1
read -t 30 -p "shu ru shu zi:" num2
read -t 30 -p "shu ru fu hao:" ope
if [ -n "$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"