COIN-OR::LEMON - Graph Library

source: lemon-0.x/src/benchmark/graph-bench.cc @ 921:818510fa3d99

Last change on this file since 921:818510fa3d99 was 921:818510fa3d99, checked in by Alpar Juttner, 15 years ago

hugo -> lemon

File size: 1.4 KB
Line 
1#include<math.h>
2#include<lemon/list_graph.h>
3
4#include"bench_tools.h"
5
6using namespace lemon;
7
8///Makes a full graph by adding and deleting a lot of edges;
9
10///\param n Number of nodes.
11///\param rat The funcion will make \f$rat\timesn^2\f$ edge addition and
12///\f$(rat-1)\timesn^2\f$ deletion.
13///\param p Tuning parameters.
14///\warning \c rat, \c p, and \c n must be pairwise relative primes.
15template <class Graph>
16void makeFullGraph(int n, int rat, int p)
17{
18  GRAPH_TYPEDEF_FACTORY(Graph);
19
20  Graph G;
21 
22  //  Node nodes[n];
23  std::vector<Node> nodes(n);
24  for(int i=0;i<n;i++) nodes[i]=G.addNode();
25 
26  //Edge equ[rat];
27  std::vector<Edge> equ(rat);
28 
29  long long int count;
30 
31  for(count=0;count<rat;count++) {
32    equ[count%rat]=G.addEdge(nodes[(count*p)%n],nodes[(count*p/n)%n]);
33  }
34  for(;(count%rat)||((count*p)%n)||((count*p/n)%n);count++) {
35    //    if(!(count%1000000)) fprintf(stderr,"%d\r",count);
36    if(count%rat) G.erase(equ[count%rat]);
37    equ[count%rat]=G.addEdge(nodes[(count*p)%n],nodes[(count*p/n)%n]);
38  }
39//   std::cout << "Added " << count
40//          << " ( " << n << "^2 * " << rat << " ) edges\n";
41
42
43  //  for(int i=0;1;i++) ;
44}
45
46int main()
47{
48  lemon::Timer T;
49  makeFullGraph<ListGraph>(nextPrim(1000),nextPrim(300),nextPrim(100));
50 
51  PrintTime("BIG",T);
52  T.reset();
53  makeFullGraph<ListGraph>(nextPrim(100),nextPrim(30000),nextPrim(150));
54
55  PrintTime("SMALL",T);
56}
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