calculator


 
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# 1  
calculator

hi, im new to the unix system and scripting and was wondering if anyone could help me with this problem iv been havin... i want the system to:
1. ask me for a number
2. ask me for a command to use on that number (* + - /)
3. ask me for another number
4. then ask me for another command, if the command is = then i want the script to end. if its another command then i want it to continue in a loop from step 2. so basically the script wont end until the = sign is used and continue to add numbers into the equation!

any help would be much appreciated.

heres my attempt...

#!/bin/sh
echo "please enter number"
read num1
echo "please enter an operation"
read operation
echo "please enter another number"
read num2
let result=$num1$operation$num2
echo "$result"
exit 0

i dont no if im even on the rite lines?!

thanks
# 2  
Smells like homework....
Anyway, take a look at bc or, if you want to do it in shell code, case..esac for the operand
# 3  
Hi,

You can even try with while loop.

clear
echo "please enter CHOICE"
read CHOICE
while [ $CHOICE != "N" ]
echo "please enter number"
read num1
echo "please enter an operation"
read operation
echo "please enter another number"
read num2
let result=$num1$operation$num2
echo "$result"
echo "please enter CHOICE"
read CHOICE
done


Thanks
 

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A Unix shell repeatedly prints a prompt, waits for a command line on stdin, and then carries out some action, as directed by the contents of the command line.
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