raindrops: iteration 1

cpp/raindrops/raindrops.cpp

@@ -1,14 +1,17 @@
 #include "raindrops.h"
 
-#include <map>
 
 namespace raindrops {
 
 using namespace std;
 
-typedef map<int, string> dictionary_t;
+struct mapping_t
+{
+    int     number;
+    string  word;
+};
 
-static const dictionary_t dictionary =
+static const mapping_t dictionary[]=
     {{3, "Pling"}, {5, "Plang"}, {7, "Plong"}};
 
 
@@ -16,10 +19,10 @@ string convert(int input)
 {
     string result;
 
-    for (auto &pair : dictionary)
-        if (!(input % pair.first)) {
+    for (auto &mapping : dictionary)
+        if (!(input % mapping.number)) {
 
-            result += pair.second;
+            result += mapping.word;
         }
 
     return result.empty() ? to_string(input) : result;