In a comment, describe what the following code do when it is executed; also, provide an equivalent method/function foo in java or C/C++

(defun foo (x y)

(+ x y)

)

; running f

( print ( foo 10 20 ) )

; funning f again

( print (foo 30 40 ) )

; running f one more time

( print (foo 40 50) )