Ajout du scripts bin_to_hex

1 files changed, 38 insertions, 0 deletions

diff --git a/semestre 3/architecture des ordinateurs/scripts/bin_to_hex.exs b/semestre 3/architecture des ordinateurs/scripts/bin_to_hex.exs
new file mode 100644
index 0000000..8d6e629
--- /dev/null
+++ b/semestre 3/architecture des ordinateurs/scripts/bin_to_hex.exs
@@ -0,0 +1,38 @@
+defmodule Conv do
+  def bin_to_hex(b) do
+	bin_to_hex_rec(b, [])
+  end
+
+  defp bin_to_hex_rec(before, aft) when before != "" do
+  	{b, a} = String.split_at(before, -4)
+	s = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"] 
+	bin_to_hex_rec(b, [Enum.at(s, bin_to_dec(a)) | aft])
+  end
+
+  defp bin_to_hex_rec("", aft) do
+    aft
+  end
+
+  def bin_to_dec(b) do
+    bin_to_dec_rec(b, 0, 0)
+  end
+
+  defp bin_to_dec_rec(before, aft, i) when before != "" do
+    {b, a} = String.split_at(before, -1)
+    bin_to_dec_rec(b, case a do
+      "0" -> aft
+      "1" -> aft + Integer.pow(2, i)
+    end, i + 1)
+  end
+
+  defp bin_to_dec_rec("", aft, _i) do
+    aft
+  end
+end
+
+Conv.bin_to_hex("1111")
+|> IO.puts() # must print f
+
+Conv.bin_to_hex("11101011")
+|> IO.puts() # must print EB
+