Number a list at end of line using 'sed'

Shell Programming and Scripting
1

Hi All
I have a script which has produced a list, I have used 'sed' to number my list, but i want to list at end of line with the first line starting at zero (0) and brackets round it
ie
My List i want

Hello (0)
this (1)
day (2)
can (3)
be (4)

sed '/./=' filename | sed '/./N; s/\n/) /'

Result i am getting using above sed command
1)Hello
2)this
3)day

Thanks if you can sort it.
Any command will do.
Chassis

2 
awk '{ printf("%s (%s)\n",$0,NR-1) }' filename
3 
awk ' { print $0 " (" NR-1 ")"}' fl
4

Thanx for the quick reply, it works, but when i use that it repeats my list adding the last line each time through the loop until it goes through what info i need to extract, so if my list is very large it will number it for ever.

ie

1
1
2
1
2
3
1
2
3
4
1
2
3
4
5
and so on

but i will play around with it, me and command 'awk' are not the best of friends...lol
Thank you
Chassis

5 
sed = filename | sed -e 'N;s/\n/  /' -e 's/\(^[0-9][0-9]* \)\(.*$\)/\2 \( \1\)/g'
6

Thanks guys
Yes the 'awk' did work (my fault) and so did the 'sed'

my 'done' went for a walk somewhere else, its now being grounded with no TV...lol

Cheers

Chassis