Bourne and Decimals?
 

I'm suppose to use the Bourne Shell

I need to get 15% of the variable exer1 to be added to other exercises

so far, i've got
exer1=$1
aver=`expr $exer \* .15`

but i keep getting an error that an integer value was expected. Is there anyway around this?

Hey there,

The straight Bourne shell doesn't have any support for floating point decimals.

The usual work-around is to (on a hundredth, like .15 or .87, etc) move the decimal point over two right and do the math, then move it back over 2 left.

Chek this link out for a script that deals with floating point in ksh (but also works in Bourne - the arithmetic, anyway):


http://linuxshellaccount.blogspot.co...metic-and.html

Hope that helps,

Mike

Hm..
 

Well.. unfortunately the site can't be opened since it's blocked here.
So I thought about that idea so I'll cut it.
ex.

exer=70
aver=`expr $exer \* 15`

the sample output would be aver =1050, but unfortunately cut doesn't work with integers i think since i tried first=`echo $aver | cut -c1-2` and the output i got was "an integer value was expected" Any help guys?

Try bc

echo 70*15|bc
1050

echo 70*.15|bc
10.50

http://www.faqs.org/docs/abs/HTML/mathc.html

Thanks
 

Thanks a lot for the bc tip. It's working smoothly now. I was stuck at that problem a while ago. Now I'll to finish my script by the end of the day. Thanks again ;)