Index: src/datahashtable.h
--- src/datahashtable.h.orig
+++ src/datahashtable.h
@@ -26,8 +26,12 @@
 #define _DATAHASHTABLE_H
 
 #include <assert.h>
-#include <iostream.h>
+#include <iostream>
 #include <stdlib.h>
+
+using std::cout;
+using std::istream;
+using std::ostream;
 
 #include "McDArray.h"