UNIX for Dummies Questions & Answers

I'm trying to find the average of 3 numbers but it doesn't seem to work. Here is what I have so far, can someone point out my mistake or show me what I need to do.

Thanks


ksh-2.04$ cat>Average

echo " Enter 1st Number "

read num1

echo " Enter 2nd Number "

read num2

echo " Enter 3rd Number "

read num3

if ((total=num1+num2+num3/3))

echo "The Average Of The 3 Numbers Is"

fi

exit

Sorry guys, I ment to post this on my first post, didn't mean to start another thread. My mistake. The question was ment for the Help with script file thread.

merged --oombera

First off, your "if" statement is incorrect.. you should have:

Code:

if ((total=num1+num2+num3/3)); then

Secondly, you didn't actually tell the script to display the total!

And thirdly, you need to obey the orders of operation... your arithmetic operation will only divide "num3" by 3.

However, I don't see a reason to use the "if" statement, which makes life even easier!

Code:

((total=(num1+num2+num3)/3))
echo "The Average Of The 3 Numbers Is" $total

However, I doubt this is the solution you want ... the result stored in $total is just the integer with anything after the decimal point cut off.

Thanks oombera, this is what I got so far, looks about right but I'm not sure. Math is clearly not my strong point. I added 3 + 3 + 3 and devided it by 3 and got 3. I know I'm supposed to get 7. I don't understand what I'm doing wrong. It's so fustrating!!

ksh-2.04$ cat>Average
echo " Enter 1st Number "

read num1

echo " Enter 2nd Number "

read num2

echo " Enter 3rd Number "

read num3

((total=(num1+num2+num3)/3))
echo "The Average Of The 3 Numbers Is" $total

exit


ksh-2.04$ sh Average
Enter 1st Number
3
Enter 2nd Number
3
Enter 3rd Number
3
The Average Of The 3 Numbers Is 3
ksh-2.04$

Kids these days need a calculator for everything.

ksh has it right. You need to review your math.

3+3+3=9

9/3=3

It would take 7 3's to get what you expect.
3+3+3+3+3+3+3=21
21/3=7

I'm a total dumba$$. Thanks for the help, I feel like a total tool.