Changeset 71:1d8d806ac8e0 in lemon-0.x

Timestamp:

02/12/04 19:11:08 (20 years ago)

Author:

marci

Branch:

default

Phase:

public

Convert:

svn:c9d7d8f5-90d6-0310-b91f-818b3a526b0e/lemon/trunk@87

Message:

read_dimacs_demo: measures elapsed time

File:

• src/work/marci/read_dimacs_demo.cc (modified) (4 diffs)

src/work/marci/read_dimacs_demo.cc

@@ +1 @@
+#include <sys/time.h>
 #include <iostream>
 #include <fstream>
+
 #include <list_graph.hh>
 #include <dimacs.hh>
@@ -6 +8 @@
 
 using namespace marci;
+
+double currTime() {
+  timeval tv;
+  //timezone tz;
+  gettimeofday(&tv, 0);
+  return double(tv.tv_sec)+double(tv.tv_usec)/1000000.0;
+}
 
 // Use a DIMACS max flow file as stdin.
@@ -20 +29 @@
   std::cout << "augmenting path flow algorithm demo..." << std::endl;
   ListGraph::EdgeMap<int> flow(G); //0 flow
+
+  double preTime=currTime();
   MaxFlow<ListGraph, int, ListGraph::EdgeMap<int>, ListGraph::EdgeMap<int> > max_flow_test(G, s, t, flow, cap);
   max_flow_test.run();
-
+  double pushTime=currTime();
   std::cout << "maximum flow: "<< std::endl;
   for(EachEdgeIt e=G.first<EachEdgeIt>(); e.valid(); ++e) { 
@@ -28 +39 @@
   }
   std::cout<<std::endl;
+  std::cout << "elapsed time: " << pushTime-preTime << " sec"<< std::endl; 
   std::cout << "flow value: "<< max_flow_test.flowValue() << std::endl;