sd

#!/bin/bash
echo "Podaj pierwsza liczbe:"
read a
echo "Podaj druga liczbe:"
read b
echo -n "Podaj dzialanie: \n + - dodawanie \n - - odejmowanie \n / - dzielenie \n X - mnozenie"
read dz
if [ $dz = "+" ]
then
wk=`expr $a + $b`
echo "$wk"
elif [ $dz = "-" ]
then
wk=`expr $a - $b`
echo "$wk"
elif [ $dz = "/" ]
then
wk=`expr $a / $b`
echo "$wk"
elif [ $dz = "X" ]
then
wk=`expr $a \* $b`
echo "$wk"
fi