food_chain: variables are renamed

cpp/food-chain/food_chain.cpp

@@ -1,12 +1,10 @@
 #include "food_chain.h"
 
-#include <string>
-
 namespace food_chain {
 
 using namespace std;
 
-#define ANIMAL_TABLE                                                        \
+#define VERSE_TABLE                                                        \
 X(Fly,    "fly",    "")                                                     \
 X(Spider, "spider", "It wriggled and jiggled and tickled inside her.\n")    \
 X(Bird,   "bird",   "How absurd to swallow a bird!\n")                      \
@@ -17,20 +15,20 @@ X(Cow,    "cow",    "I don't know how she swallowed a cow!\n")              \
 X(Horse,  "horse",  "She's dead, of course!\n")
 
 #define X(a, b, c) a,
-enum Animal {
-    ANIMAL_TABLE
+enum Verse {
+    VERSE_TABLE
 };
 #undef X
 
 #define X(a, b, c) b,
-static const char *animal_name[] = {
-    ANIMAL_TABLE
+static const char *food_name[] = {
+    VERSE_TABLE
 };
 #undef X
 
 #define X(a, b, c) c,
 static const char *verse_phrase[] = {
-    ANIMAL_TABLE
+    VERSE_TABLE
 };
 #undef X
 
@@ -42,20 +40,20 @@ string verse(int index)
     --index;
 
     result += string("I know an old lady who swallowed a ")
-       + animal_name[index]
+       + food_name[index]
        + ".\n"
        + verse_phrase[index];
 
-    if (index != Animal::Horse) {
+    if (index != Verse::Horse) {
 
-        for (int i = index; i > Animal::Fly; --i) {
+        for (int i = index; i > Verse::Fly; --i) {
 
             result += string("She swallowed the ")
-               + animal_name[i]
+               + food_name[i]
                + " to catch the "
-               + animal_name[i-1];
+               + food_name[i-1];
 
-            if (i == Animal::Bird)
+            if (i == Verse::Bird)
                 result += string(" that wriggled and jiggled and "
                                  "tickled inside her");