bash

[obi]

I'm making a simple bash calculator:

#!/bin/bash
while [ 1 -eq 1 ]

do

read arg1 op arg2

if [[ "$arg1" -eq "exit" ]]

then

break

fi
flag=0
for ops in + - * / % **
do
    if [[ "$op" = "$ops" ]]
    then
        flag=1
    fi  
done 

if [[ $flag = 1 ]]
then
    let "result = $arg1 $op $arg2"
    echo "$result"
else
    echo "error"
fi

done
echo "bye"

The point is, at the entrance, I'm giving three meanings, arguments and surgery between them. For example, 12 + 5♪

Everything's working well except operations. * and **♪

What's the matter?

[Rossere]

for ops in + - * / % **

at least. * and ** I'd like all the arguments:

for ops in '+' '-' '*' '/' '%' '**'

Then the shell won't try to to do anything.