Esempi in C++ (Cpp) per weighted_degree

Esempio n. 1

File: graph_binary.cpp Progetto: gskman/goffish

Graph::Graph(char *filename, char *filename_w, int type) {
  ifstream finput;
  finput.open(filename,fstream::in | fstream::binary);

  // Read number of nodes on 4 bytes
  finput.read((char *)&nb_nodes, 4);
  assert(finput.rdstate() == ios::goodbit);

  // Read cumulative degree sequence: 8 bytes for each node
  // cum_degree[0]=degree(0); cum_degree[1]=degree(0)+degree(1), etc.
  degrees.resize(nb_nodes);
  finput.read((char *)&degrees[0], nb_nodes*8);

  // Read links: 4 bytes for each link (each link is counted twice)
  nb_links=degrees[nb_nodes-1];
  links.resize(nb_links);
  finput.read((char *)(&links[0]), (long)nb_links*8);  

  // IF WEIGHTED : read weights: 4 bytes for each link (each link is counted twice)
  weights.resize(0);
  total_weight=0;
  if (type==WEIGHTED) {
    ifstream finput_w;
    finput_w.open(filename_w,fstream::in | fstream::binary);
    weights.resize(nb_links);
    finput_w.read((char *)&weights[0], (long)nb_links*4);  
  }    

  // Compute total weight
  for (unsigned int i=0 ; i<nb_nodes ; i++) {
    total_weight += (double)weighted_degree(i);
  }
}

Esempio n. 2

File: graph_binary.cpp Progetto: smndf/structured-topics

Graph::Graph(char *filename, char *filename_w, int type) {
  ifstream finput;
  finput.open(filename,fstream::in | fstream::binary);
  if (finput.is_open() != true) {
    cerr << "The file " << filename << " does not exist" << endl;
    exit(EXIT_FAILURE);
  }

  // Read number of nodes on 4 bytes
  finput.read((char *)&nb_nodes, sizeof(int));
  if (finput.rdstate() != ios::goodbit) {
    cerr << "The file " << filename << " is not a valid graph" << endl;
    exit(EXIT_FAILURE);
  }
  
  // Read cumulative degree sequence: 8 bytes for each node
  // cum_degree[0]=degree(0); cum_degree[1]=degree(0)+degree(1), etc.
  degrees.resize(nb_nodes);
  finput.read((char *)&degrees[0], nb_nodes*sizeof(unsigned long long));

  // Read links: 4 bytes for each link (each link is counted twice)
  nb_links = degrees[nb_nodes-1];
  links.resize(nb_links);
  finput.read((char *)(&links[0]), nb_links*sizeof(int));

  // IF WEIGHTED, read weights: 10 bytes for each link (each link is counted twice)
  weights.resize(0);
  total_weight = 0.0L;
  if (type==WEIGHTED) {
    ifstream finput_w;
    finput_w.open(filename_w,fstream::in | fstream::binary);
    if (finput_w.is_open() != true) {
      cerr << "The file " << filename_w << " does not exist" << filename << endl;
      exit(EXIT_FAILURE);
    }

    weights.resize(nb_links);
    finput_w.read((char *)(&weights[0]), nb_links*sizeof(long double));
    if (finput_w.rdstate() != ios::goodbit) {
      cerr << "The file " << filename_w << " does not correspond to valid weights for the graph" << filename << endl;
      exit(EXIT_FAILURE);
    }
  }

  // Compute total weight
  for (int i=0 ; i<nb_nodes ; i++)
    total_weight += (long double)weighted_degree(i);

  nodes_w.assign(nb_nodes, 1);
  sum_nodes_w = nb_nodes;
}