Shell Programming and Scripting

Following is the code:
------------------------------

Code:

a=100
b=200
c=300
touch testfl.txt.gz
chmod 664 testfl.txt.gz
echo $a|gzip >> "testfl.txt.gz"
echo $b|gzip >> "testfl.txt.gz"
echo $c|gzip >> "testfl.txt.gz"

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There is a requirement as follows.
I need to compress the value of the variable a and written into the text file testfl.txt.gz in compressed format.

I need to compress the value of the variable b and appended into the file testfl.txt.gz

I need to compress the value of the variable c and appended into the file testfl.txt.gz

when i uncompress the file testfl.txt.gz using gunzip testfl.txt.gz
i will be getting testfl.txt

when i view the content of it ..."cat testfl.txt" it shows only 300
100 and 200 does not present in the file.

The expected output is as follows.

Code:

100
200
300

can anyone help me out.

thanks
Krishnakanth

I ran the script on my machine(Linux and OS X) and it works fine. I have to admit that looks really weird but it does actually work.