Erlang: Temperature Conversion

temp.erl

% http://www.erlang.org/course/exercises.html
% Write functions temp:f2c(F) and temp:c2f(C) which convert between centigrade and Fahrenheit scales. (hint 5(F-32) = 9C)
-module(temp).
-export([c2f/1, f2c/1, convert/1]).

c2f(C) -> (C *9/5) + 32.
f2c(F) -> (F - 32) * 5/9.

convert({From, What}) ->
        case {From, What} of
                {c, What} -> c2f(What);
                {f, What} -> f2c(What);
                {_, _}    -> io:format("incorrect format~n")
        end.

Thanks for the code. But how to take input( fread , read, etc) in start() function and pass it the convert() function. Thanks in advance