diff -r e5957f8866e6 -r 15098fb5275c demo/sub_graph_adaptor_demo.cc
--- a/demo/sub_graph_adaptor_demo.cc	Wed Jul 20 16:03:41 2005 +0000
+++ b/demo/sub_graph_adaptor_demo.cc	Wed Jul 20 16:05:04 2005 +0000
@@ -16,6 +16,11 @@
 #include <lemon/preflow.h>
 #include <tight_edge_filter_map.h>
 
+
+
+//#include <lemon/graph_reader.h>
+//#include <lemon/graph_writer.h>
+
 using namespace lemon;
 
 using std::cout;
@@ -25,7 +30,7 @@
 {
   if(argc<2)
   {
-      std::cerr << "USAGE: sub_graph_adaptor_demo <input_file.dim>" << std::endl;
+      std::cerr << "USAGE: sub_graph_adaptor_demo input_file.dim" << std::endl;
       std::cerr << "The file 'input_file.dim' has to contain a max flow instance in DIMACS format (e.g. sub_graph_adaptor_demo.dim is such a file)." << std::endl;
       return 0;
   }
@@ -48,6 +53,16 @@
 
   readDimacs(is, g, length, s, t);
 
+//     GraphWriter<SmartGraph> writer(std::cout, g);
+//     writer.writeEdgeMap("length", length);
+//     writer.writeNode("source",s);
+//     writer.writeNode("target",t);
+//     writer.run();
+
+//   GraphReader<ListGraph> reader(is,g);
+//   reader.readNode("source",s).readNode("target",t)
+//     .readEdgeMap("length",length).run();
+
   cout << "edges with lengths (of form id, source--length->target): " << endl;
   for(EdgeIt e(g); e!=INVALID; ++e) 
     cout << " " << g.id(e) << ", " << g.id(g.source(e)) << "--"