//-----------------------------------------------------------------------------
#include <iostream.h>
#include <stdlib.h>
#include <LEDA/ugraph.h>
#include <LEDA/graph_gen.h>
#include <LEDA/node_array.h>
#include <LEDA/queue.h>
//-----------------------------------------------------------------------------
const int TRUE = 1;
const int FALSE = 0;

void DFS(const ugraph &MyGraph);
void DoDFS(const ugraph &MyGraph,const node NodeID,node_array<bool> &Visited);
//-----------------------------------------------------------------------------
int main(int argc,char *argv[]) {

int NumberOfNodes = atoi(argv[1]);
int NumberOfEdges = atoi(argv[2]);

ugraph MyGraph;

cout << "Creating random graph with " << NumberOfNodes << " nodes and "
     << NumberOfEdges << " edges" << endl;
random_simple_undirected_graph(MyGraph,NumberOfNodes,NumberOfEdges);
MyGraph.print();

DFS(MyGraph);

return(0);
}
//-----------------------------------------------------------------------------
void DFS(const ugraph &MyGraph) {

node_array<bool> Visited(MyGraph,FALSE);

cout << "DFS from node ";
MyGraph.print_node(MyGraph.first_node());
cout << " : ";
DoDFS(MyGraph,MyGraph.first_node(),Visited);
cout << endl;
}
//-----------------------------------------------------------------------------
void DoDFS(const ugraph &MyGraph,const node Node,node_array<bool> &Visited) {

node AdjacentNode;

MyGraph.print_node(Node);
Visited[Node] = TRUE;
forall_adj_nodes(AdjacentNode,Node)
    if (!Visited[AdjacentNode])
        DoDFS(MyGraph,AdjacentNode,Visited);
}
//-----------------------------------------------------------------------------