#include "fstream"
#include "GraphType.h"
#include "GraphConcept.h"
using namespace std;
using namespace Graphs;
void graph_example()
{
typedef GraphVertex< GraphEdge > vertex_type;
typedef GraphEdge edge_type;
typedef GraphConcept< vertex_type , edge_type > pres_type;
GraphConcept< vertex_type , edge_type > G;
// generate a random graph
int N = 16;
for( int i=0 ; i<16 ; ++i ) G.newVertex( vertex_type( ) );
float edge_param = 2.0/N;
for( int i=0 ; i
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