src/work/marci/bfsit_vs_byhand.cc
changeset 1365 c280de819a73
parent 1364 ee5959aa4410
child 1366 d00b85f8be45
     1.1 --- a/src/work/marci/bfsit_vs_byhand.cc	Sun Apr 17 18:57:22 2005 +0000
     1.2 +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.3 @@ -1,90 +0,0 @@
     1.4 -// -*- c++ -*-
     1.5 -#include <iostream>
     1.6 -#include <fstream>
     1.7 -
     1.8 -//#include <sage_graph.h>
     1.9 -#include <lemon/smart_graph.h>
    1.10 -#include <lemon/list_graph.h>
    1.11 -#include <lemon/dimacs.h>
    1.12 -#include <lemon/time_measure.h>
    1.13 -//#include <lemon/for_each_macros.h>
    1.14 -#include <bfs_mm.h>
    1.15 -#include <lemon/bfs.h>
    1.16 -
    1.17 -using namespace lemon;
    1.18 -
    1.19 -using std::cout;
    1.20 -using std::endl;
    1.21 -
    1.22 -int main() {
    1.23 -  //  typedef SageGraph Graph; 
    1.24 -  typedef SmartGraph Graph ;
    1.25 -  //typedef ListGraph Graph; 
    1.26 -  typedef Graph::Node Node;
    1.27 -  typedef Graph::NodeIt NodeIt;
    1.28 -  typedef Graph::Edge Edge;
    1.29 -  typedef Graph::EdgeIt EdgeIt;
    1.30 -  typedef Graph::OutEdgeIt OutEdgeIt;
    1.31 -
    1.32 -  Graph g;
    1.33 -  readDimacs(std::cin, g);
    1.34 -  NodeIt s(g);
    1.35 -
    1.36 -  cout << g.nodeNum() << endl;
    1.37 -  cout << g.edgeNum() << endl;
    1.38 -
    1.39 -  Graph::NodeMap<Edge> pred(g);
    1.40 -  cout << "iteration time of bfs written by hand..." << endl;
    1.41 -  Timer ts;
    1.42 -  ts.reset();
    1.43 -  for (int i=0; i<100; ++i)
    1.44 -  {
    1.45 -    Graph::NodeMap<bool> reached(g);
    1.46 -    reached.set(s, true);
    1.47 -    pred.set(s, INVALID);
    1.48 -    std::queue<Node> bfs_queue;
    1.49 -    bfs_queue.push(s);
    1.50 -    while (!bfs_queue.empty()) {
    1.51 -      Node v=bfs_queue.front();	
    1.52 -      bfs_queue.pop();
    1.53 -      for(OutEdgeIt e(g,v); e!=INVALID; ++e) {
    1.54 -	Node w=g.target(e);
    1.55 -	if (!reached[w]) {
    1.56 -	  bfs_queue.push(w);
    1.57 -	  reached.set(w, true);
    1.58 -	  pred.set(w, e);
    1.59 -	}
    1.60 -      }
    1.61 -    }
    1.62 -  }
    1.63 -  std::cout << ts << std::endl;
    1.64 -
    1.65 -  cout << "iteration time with bfs iterator..." << endl;
    1.66 -  ts.reset();      
    1.67 -  for (int i=0; i<100; ++i)
    1.68 -  {
    1.69 -    Graph::NodeMap<bool> reached(g);
    1.70 -    marci::BfsIterator< Graph, Graph::NodeMap<bool> > bfs(g, reached);
    1.71 -    bfs.pushAndSetReached(s);
    1.72 -    pred.set(s, INVALID);
    1.73 -    while (!bfs.finished()) { 
    1.74 -      ++bfs; 
    1.75 -      if (Graph::Edge(bfs)!=INVALID && bfs.isBNodeNewlyReached()) 
    1.76 -	pred.set(bfs.target(), Graph::Edge(bfs));
    1.77 -    }
    1.78 -  }
    1.79 -  std::cout << ts << std::endl;
    1.80 -
    1.81 -  cout << "iteration time with bfs aplar..." << endl;
    1.82 -  ts.reset();      
    1.83 -  for (int i=0; i<100; ++i)
    1.84 -  {
    1.85 -    Bfs<Graph> bfs(g);
    1.86 -    bfs.setPredMap(pred);
    1.87 -    bfs.run(s);
    1.88 -  }
    1.89 -  std::cout << ts << std::endl;
    1.90 -
    1.91 -
    1.92 -  return 0;
    1.93 -}