Use a c++ compiler

Makefile

@@ -1,4 +1,4 @@
-CC = gcc
+CC = g++
 CFLAGS = -g
 
 all: cyoa

cyoa.leg

@@ -1,8 +1,9 @@
 %{
-  
-#include <stdio.h>
-#include <stdlib.h>
-#include <assert.h>
+
+#include <vector>
+#include <cstdio>
+#include <cstdlib>
+#include <cassert>
 
 typedef struct page_t page_t;
 typedef struct footer_t footer_t;
@@ -110,7 +111,7 @@ TextLine =     < (!Newline .)* Newline > { $$.string = strndup(yytext, yyleng);
 
 Footer =       Ending { $$.page = emit_ending(); }
 	       | g:Goto { $$.page = emit_goto(g.string); }
-	       | c:ChoiceList { $$.page = emit_choices(c.choices); }
+	       | c:ChoiceList { $$.page = emit_choices(); }
 	       ;
 
 Goto =         'GOTO' Spacing < i:Identifier > Newline