using save command

[dastew]

I have a function that I want to pass a partial file mane to and the form up the complete file name as follows:


fname="f10"

and latter


ffname = [fname ".txt"]


now I want to use the save command

save  -ascii  ffname  a

but it makes a file name called   ffname
and I wanted a file called f10.txt

How do I use save when the file name is in a variable?

Doug