### add lec02 code, very slightly tweaked from au21 (removed the example of an...

`add lec02 code, very slightly tweaked from au21 (removed the example of an explicit return type, which is a matter of instructor taste)`
parent 87b254e9
 (* These two lines will be at the top of provided lecture code just to make the repl cleaner for teaching. You can leave them commented out, or not, or use them in your homework, or not, as you wish. *) (* #utop_prompt_dummy let _ = UTop.set_show_box false *) let max ((x:int),(y:int)) = if x > y then x else y let is_even (x : int) = (x mod 2) = 0 let average ((x:int),(y:int)) = (x+y)/2 let average_ceil ((x:int),(y:int)) = ((x+y)/2) + (if not (is_even (x + y)) then 1 else 0) let average_ceil_or_not ((x:int),(y:int),(ceil:bool)) = ((x+y)/2) + (if ceil && not (is_even (x + y)) then 1 else 0) let average_f ((x:float),(y:float)) = (x +. y) /. 2.0 (* Note: pow assumes y >= 0 *) let rec pow ((x:int),(y:int)) = if y = 0 then 1 else x * pow(x,y-1) let cube (x:int) = pow(x,3) let sixtyfour = cube 4 let fortytwo = pow(2,4) + pow(4,2) + cube 2 + 2
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