read values from stdin lines

[eadmaster]

is it possible to read values from stdin lines and pass them to a function?
e.g.

$ cat a
1
2
3
$ cat a | qalc "mean(load(stdin))"
2  # expected output

[howaboutuser]

cat a|qalc "mean(load(/dev/stdin))"
qalc "mean(load(/dev/stdin))"<a