Shell Programming and Scripting

Dear experts,

Here is a small description of my problem.

Every 30s call is charged 200 cents.

e.g 1. if customer A makes a 90s call, he shud be charged 600 cents
2. If customer makes a 240s call, he shud be charged 1600 cents

The maximum seconds the call can last is 5400 s which is 90 minutes and maximum charge of 36000 cents

How can i put this in a simplest format using if then else, instead of putting it in 180 loops?

Pls help.

You might want to explain a bit more about your problem. I can't see how an if-then-else is applicable here, nor why you need 180 loops. It's a simple multiplication, unless there's (strange) stuff going on around it.

The only thing you check with if/then/fi would be if the max for seconds or cash has been hit. The rest is just some maths, as Pludi said.

Example:

Code:

#!/bin/bash

MAX=5400
PRICE=200
UNIT=30

echo "Enter seconds:"
while read USED; do
    if (( $USED < 5400 )); then
        echo "You're inside the limit; pay me $(($USED*$PRICE/$UNIT)) cents!"
    else
        echo "Hey, you're out of bounds!"
    fi
done

exit 0

Output:

Code:

Enter seconds:
90
You're inside the limit; pay me 600 cents!
6000
Hey, you're out of bounds!

Hi Zaxxon,

Thanks. Sorry for being very brief in my description. Here is more details.

Actually the calculation is already by a system and output files are generated in a file.

e.g

Code:

customerA|time in s|amount
custA|60|400

What i have to do is, grep this scenarios and dump them in a file. This is for a particular type of call, say an international call.

for national call, the rates for 30s maybe in multiples of 50 cents each time.

I have to capture the international calls by this conditions and dump them to a file.

pls help.

If I understood it correct, you have a file with plenty of these:

Code:

custA|60|400
...

And you just want to have those, that have a higher value in one of the fields, like let's say the > 400:

Code:

awk -F"|" '$3 > 400' infile

That will print all lines in file "infile" where the field 3 is higher than 400.