diff -u gnuPlotFile.h.orig gnuPlotFile.h
--- gnuPlotFile.h.orig	Mon May 18 04:12:01 1998
+++ gnuPlotFile.h	Thu Oct 30 21:42:04 2003
@@ -28,6 +28,8 @@
 
 #include <string>
 
+using namespace std;
+
 class gnuPlotFile
 {
 public: