raindrops: tests are passed

cpp/raindrops/raindrops.cpp

@@ -0,0 +1,28 @@
+#include "raindrops.h"
+
+#include <map>
+
+namespace raindrops {
+
+using namespace std;
+
+typedef map<int, string> dictionary_t;
+
+static const dictionary_t dictionary =
+    {{3, "Pling"}, {5, "Plang"}, {7, "Plong"}};
+
+
+string convert(int input)
+{
+    string result;
+
+    for (auto &pair : dictionary)
+        if (!(input % pair.first)) {
+
+            result += pair.second;
+        }
+
+    return result.empty() ? to_string(input) : result;
+}
+
+}

cpp/raindrops/raindrops.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#define EXERCISM_RUN_ALL_TESTS
+
+#include <string>
+
+namespace raindrops {
+
+std::string convert(int);
+
+}