Bash scripting help

[[Neo770]]

Hi all,

We got this mini test like 2 weeks ago and I have no clue how to do it.

Here what we wew asked to do:

Program will prompt user for correct information, then calculate charge from the following table.

Weight	        Destination	Handling Code	Surcharge
10-  100	Brisbane          S	                  10
101-200	       Brisbane          S	                 15
10-  100	Brisbane          E	                  20
101-200	       Brisbane          E	                 35
10-  100	Sydney	          S	                  12
101-200	       Sydney	         S	                 19
10-  100	Sydney	          E	                  28
101-200	       Sydney	         E	                 45

The program will tell the user the following information in this format:

Package of 10 grams
Destination Sydney
Surcharge 12.00
Handling S

-----

Im not a complete newbi at scripting, im just hopeless at figuring out these kinds of problems, so a point in the direction of where I should start would be great. This is not a test for grading so dont worry about helping to much..

Thanks.

[krohnjw]

Well, basically just use echo to send out information, read to get info.
That info will come in as the $REPLY variable, so that you can set up conditionals to calculate your charge.

eg.
#!/bin/bash

echo "Enter some random number sucka"
read
echo "Here it is again"
echo $REPLY

[[Neo770]]

Thanks, but the bit that I need help with is the process of calculating the charge.

[krohnjw]

Ah, sorry
Well, the easiest way to do it is to construct nested conditionals.
I dont know how you will prompt for the information, but an easy way to do it would be as so

if (type)
     if (dest)
         if (length)
else //other type
     if (dest)
        if (length)

with the appropriate elseif statements.

I don't know if I understand where your problem lies here Feel free to be more specific, ie the logic, actual calculation, etc and this could be made much simpler

[[Neo770]]

Ok the logic is where I always have trouble in programming. This is a network engineering course not a programming course.

The teacher started to work through the solution in class today.

It went something like:

if weight is greater then 10 and less then 100 then process low weight

else process high weight if between 100 and 200

---------
That’s how the if statement started out

Basically say that the weight was 50 going to brisbane with Standard handling then the program would say it equals 10

He said it could also be done with the case statement but as to not confuse us he is only showing us the if/then way.

That’s as far as we got today and next Linux scripting class is not till next week unfortunately.

Thanks for the help so far

[Mike]

Originally posted by krohnjw
echo "Enter some random number sucka"

Yes, the best line of code ever...

Where was Eddy on this one? I know he loves bash scripting...