diff -r a34e5a909e97 -r ee17030e5f47 src/work/alpar/smart_graph_demo.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/work/alpar/smart_graph_demo.cc	Sun Mar 07 19:33:34 2004 +0000
@@ -0,0 +1,36 @@
+#include<smart_graph.h>
+
+#include <iostream>
+
+using namespace hugo;
+
+SmartGraph::OutEdgeIt safeFirstOut(const SmartGraph &G, SmartGraph::NodeIt n)
+{
+  return G.valid(n) ? SmartGraph::OutEdgeIt(G,n):Invalid;
+}
+
+int main()
+{
+
+  typedef SmartGraph::EdgeIt EdgeIt;
+  typedef SmartGraph::InEdgeIt InEdgeIt;
+  typedef SmartGraph::OutEdgeIt OutEdgeIt;
+  typedef SmartGraph::EachEdgeIt EachEdgeIt;
+  typedef SmartGraph::NodeIt NodeIt;
+  typedef SmartGraph::EachNodeIt EachNodeIt;
+  
+  SmartGraph G;
+  EachNodeIt n;
+
+
+  //  std::cout.form("%s: %d\n","Sztring",15);
+
+  for(int i=0;i<10;i++) G.addNode();
+  for(G.getFirst(n);G.valid(n);G.next(n)) 
+    for(EachNodeIt m(G);m!=Invalid;G.next(m)) 
+      if(n!=m) G.addEdge(n,m);
+
+  OutEdgeIt e = safeFirstOut(G,n);
+  OutEdgeIt f = safeFirstOut(G,EachNodeIt(G));
+  
+}