Update c/beer-song verse

c/beer-song/src/beer_song.c

@@ -1,36 +1,40 @@
 #include <stdio.h>
 
-void verse(char* response, int bottles) {
+int verse(char* response, int bottles) {
   if (bottles < 0) {
-    return;
+    return 0;
   }
 
   switch (bottles) {
   case 0:
-    sprintf(response,
-	    "No more bottles of beer on the wall, no more bottles of beer.\n"
-	    "Go to the store and buy some more, "
-	    "99 bottles of beer on the wall.\n");
-    return;
+    return sprintf(response,
+		   "No more bottles of beer on the wall, "
+		   "no more bottles of beer.\n"
+		   "Go to the store and buy some more, "
+		   "99 bottles of beer on the wall.\n");
+
   case 1:
-    sprintf(response,
-	    "1 bottle of beer on the wall, 1 bottle of beer.\n"
-	    "Take it down and pass it around, "
-	    "no more bottles of beer on the wall.\n");
-    return;
+    return sprintf(response,
+		   "1 bottle of beer on the wall, "
+		   "1 bottle of beer.\n"
+		   "Take it down and pass it around, "
+		   "no more bottles of beer on the wall.\n");
+
   case 2:
-    sprintf(response,
-	    "2 bottles of beer on the wall, 2 bottles of beer.\n"
-	    "Take one down and pass it around, "
-	    "1 bottle of beer on the wall.\n");
-    return;
+    return sprintf(response,
+		   "2 bottles of beer on the wall, "
+		   "2 bottles of beer.\n"
+		   "Take one down and pass it around, "
+		   "1 bottle of beer on the wall.\n");
+
   default:
-    sprintf(response,
-	    "%d bottles of beer on the wall, %d bottles of beer.\n"
-	    "Take one down and pass it around, "
-	    "%d bottles of beer on the wall.\n",
-	    bottles, bottles, bottles - 1);
-    return ;
+    return sprintf(response,
+		   "%d bottles of beer on the wall, "
+		   "%d bottles of beer.\n"
+		   "Take one down and pass it around, "
+		   "%d bottles of beer on the wall.\n",
+		   bottles, bottles, bottles - 1);
+
   }
 }