gistfile1.erl

-module(test).
-compile(export_all).

-define(MILLISECONDS, 1).·
-define(SECONDS, 1000*?MILLISECONDS).
-define(MINUTES, 60*?SECONDS).

start() ->
    io:format("minutes is ~p~n", [?MINUTES]),
    io:format("is minutes an interger? ~p~n", [is_integer(?MINUTES)]),
    io:format("(100*250)/~p = ~p~n", [?MINUTES, (100*250) / ?MINUTES] ),
    io:format("(100*250)/~p = ~p~n", [60000, (100*250) / 60000] ).


2> test:start().
minutes is 60000
is minutes an interger? true
(100*250)/60000 = 416666.6666666667
(100*250)/60000 = 0.4166666666666667
ok