From 1e2dd2cf99082888dbcee45767bdcf5ef228e9ad Mon Sep 17 00:00:00 2001
From: Dmitry Kokorin <dmitry@kokorin.org>
Date: Wed, 2 Mar 2016 15:03:38 +0300
Subject: [PATCH] rna_transcription: iteration 1

---
 cpp/rna-transcription/rna_transcription.cpp | 25 +++++++++++++++++++++
 cpp/rna-transcription/rna_transcription.h   | 12 ++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 cpp/rna-transcription/rna_transcription.cpp
 create mode 100644 cpp/rna-transcription/rna_transcription.h

diff --git a/cpp/rna-transcription/rna_transcription.cpp b/cpp/rna-transcription/rna_transcription.cpp
new file mode 100644
index 0000000..2f4d4ef
--- /dev/null
+++ b/cpp/rna-transcription/rna_transcription.cpp
@@ -0,0 +1,25 @@
+#include "rna_transcription.h"
+
+#include <algorithm>
+#include <unordered_map>
+
+namespace transcription {
+
+using namespace std;
+
+char to_rna(char c)
+{
+    static const unordered_map<char, char> nucleotide_map =
+        {{'C', 'G'}, {'G', 'C'}, {'A', 'U'}, {'T', 'A'}};
+
+    return nucleotide_map.at(c);
+}
+
+string to_rna(string str)
+{
+    transform(str.begin(), str.end(), str.begin(),
+            static_cast<char (*)(char)>(&to_rna));
+    return str;
+}
+
+}
diff --git a/cpp/rna-transcription/rna_transcription.h b/cpp/rna-transcription/rna_transcription.h
new file mode 100644
index 0000000..eba3f14
--- /dev/null
+++ b/cpp/rna-transcription/rna_transcription.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#define EXERCISM_RUN_ALL_TESTS
+
+#include <string>
+
+namespace transcription {
+
+char        to_rna(char);
+std::string to_rna(std::string);
+
+}