first commit

1 files changed, 28 insertions, 0 deletions

diff --git a/problem22.erl b/problem22.erl
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index 0000000..5017424
--- /dev/null
+++ b/problem22.erl
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+-module(problem22).
+-export([solve/0]).
+
+solve() ->
+	word_values(read_words("names.txt"), 1, 0).
+
+word_values([], _, V) ->
+	V;
+word_values([H|T], N, V) ->
+	word_values(T, N + 1, V + (N * value(H))).
+
+read_words(Filename) ->
+	{ok, File} = file:read_file(Filename),
+	L = binary_to_list(File),
+	N = string:tokens(L, ","),
+	lists:sort(fun(A,B) -> A < B end, N).
+
+value([H|T]) ->
+	if
+		(H > 64) and (H < 91) ->
+			(H - 64) + value(T);
+		(H > 96) and (H < 123) ->
+			(H - 96) + value(T);
+		true ->
+			value(T)
+	end;
+value([]) ->
+	0.