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[英]Boost graph: How to copy the nodes and edges of a graph without copying properties?
[英]Copying edges BOOST graph c++
我正在嘗試制作一個程序來從.txt文件(類似於http://pastebin.com/g4cgaHJB )中讀取圖形,然后創建並將其放入向量中。 (這部分工作正常)
here ise the code:
#include <iostream>
#include <vector>
#include <ctime>
#include <set>
#include <fstream>
#include <string>
#include <unordered_set>
#include <cstdlib>
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/classification.hpp>
#include <boost/graph/adjacency_list.hpp>
using namespace std;
using namespace boost;
using namespace boost::algorithm;
/*********************************************/
//vertex
struct VertexProperties
{
int id;
int label;
VertexProperties(){}
VertexProperties(unsigned i, unsigned l) : id(i), label(l) {}
};
//edge
struct EdgeProperties
{
unsigned id;
unsigned label;
EdgeProperties(){}
EdgeProperties(unsigned i, unsigned l) : id(i), label(l) {}
};
//Graph
struct GraphProperties
{
unsigned id;
unsigned label;
GraphProperties() {}
GraphProperties(unsigned i, unsigned l) : id(i), label(l) {}
};
//adjency list
typedef boost::adjacency_list<
boost::vecS, boost::vecS, boost::directedS,
VertexProperties,
EdgeProperties,
GraphProperties
> Graph;
//descriptors
typedef boost::graph_traits<Graph>::vertex_descriptor vertex_t;
typedef std::pair<boost::graph_traits<Graph>::edge_descriptor, bool> edge_t;
//iterators
typedef graph_traits<Graph>::vertex_iterator vertex_iter;
typedef graph_traits<Graph>::edge_iterator edge_iter;
/****************************************************************************/
//le seuil int seuil;
std::vector<std::string> tokens;
/*
programme principal
*/
int main()
{
vector<Graph> dataG; // vector<graphes> * pointsdataG;
ifstream * file_reader= new ifstream("5.txt" ); //flux d'entrée pour opérer sur les fichiers.
while (!file_reader->eof())
{
string line;
file_reader->sync();//Synchronize input buffer
getline(*file_reader, line);//getline reads characters from an input stream and places them into a string
std::stringstream ss(line); //use a string buffer that contains a sequence of characters.
char lineType;
ss >> lineType;
if(lineType =='t')
{
char diez;
int gid;
ss >> diez >> gid;
Graph g(GraphProperties(gid,gid));
dataG.push_back(g);
} else if (lineType == 'v')
{
assert(!dataG.empty());//evaluate the parameter. If this parameter is false it causes an assertion failure that terminates the program.
int vId, vLabel;
ss >> vId >> vLabel;
boost::add_vertex(VertexProperties(vId, vLabel), dataG[dataG.size()-1]);
} else if (lineType == 'e')
{
assert(!dataG.empty());
int fromId, toId, vLabel;
ss >> fromId >> toId >> vLabel;
// Note that the EdgeProperty.id doesn't make sense with your input data
// as it only contains [vertexFrom vertexTo edgeData]
boost::add_edge(fromId, toId,
EdgeProperties(vLabel, vLabel), dataG[dataG.size()-1]);
}
}
cout<<"fin."<<endl; // fin du programme.
return 0;
}
想法:我試圖通過從第一個邊緣開始迭代來遍歷圖(並從中創建一個圖,將其稱為testg),並測試該圖是否頻繁(我將測試testg和其中的每個圖之間的子圖同構dataG向量,然后我將計算多少時間(如果有那么多的時間,那么2表示testg頻繁出現)為真,如果testg頻繁出現,那么我將向其添加另一個相鄰邊(然后再次進行子圖同態檢驗),如果testg不再頻繁,我將刪除最后一個添加的邊(回溯),然后將其更改為另一個邊(然后再次進行子圖同構測試)。 如果沒有其他要添加的邊緣,我會說testg已關閉。 並把它放在向量中,我們稱其為closedG。
我通過執行以下操作開始了這個想法:
auto gr=dataG.at(0);
Graph testg();
edge_pair ep;
for (ep = edges(gr); ep.first != ep.second; ++ep.first) //ep edge number
{
vertex_t from = source(*ep.first, gr);
vertex_t to = target(*ep.first, gr);
edge_t edg = edge(from, to, gr);
boost::add_edge(from, to,testg);
}
但是,它不起作用! 這是錯誤:
In function 'int main()'
:workshop.cpp:123:42: error: no matching function for call to 'add_edge(vertex_t&, vertex_t&, Graph (&)())'boost:
:add_edge(from, to, testg);
workshop.cpp:123:42: note: candidates are
:In file included from ./boost/graph/adjacency_list.hpp:246:0,from workshop.cpp:12
:./boost/graph/detail/adjacency_list.hpp:707:5: note: template<class Config> std::pair<typename boost::directed_graph_helper<Config>::edge_descriptor, bool> boost::add_edge(typename Config::vertex_descriptor, typename Config::vertex_descriptor, const typename Config::edge_property_type&, boost::directed_graph_helper<Config>&)add_edge(typename Config:
:vertex_descriptor u,
./boost/graph/detail/adjacency_list.hpp:707:5: note: template argument deduction/substitution failed
:workshop.cpp:123:42: note: candidate expects 4 arguments, 3 providedboost:
:add_edge(from, to, testg);
In file included from ./boost/graph/adjacency_list.hpp:246:0,from workshop.cpp:12
:./boost/graph/detail/adjacency_list.hpp:727:5: note: template<class Config> std::pair<typename Config::edge_descriptor, bool> boost::add_edge(typename Config::vertex_descriptor, typename Config::vertex_descriptor, boost::directed_graph_helper<Config>&)add_edge(typename Config:
:vertex_descriptor u,
./boost/graph/detail/adjacency_list.hpp:727:5: note: template argument deduction/substitution failed
:workshop.cpp:123:42: note: mismatched types 'boost::directed_graph_helper<Config>' and 'Graph() {aka boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS, VertexProperties, EdgeProperties, GraphProperties>()}'boost:
:add_edge(from, to, testg);
In file included from ./boost/graph/adjacency_list.hpp:246:0,from workshop.cpp:12
:./boost/graph/detail/adjacency_list.hpp:1045:5: note: template<class Config> std::pair<typename Config::edge_descriptor, bool> boost::add_edge(typename Config::vertex_descriptor, typename Config::vertex_descriptor, const typename Config::edge_property_type&, boost::undirected_graph_helper<C>&)add_edge(typename Config:
:vertex_descriptor u,
./boost/graph/detail/adjacency_list.hpp:1045:5: note: template argument deduction/substitution failed
:workshop.cpp:123:42: note: candidate expects 4 arguments, 3 providedboost:
:add_edge(from, to, testg);
In file included from ./boost/graph/adjacency_list.hpp:246:0,from workshop.cpp:12
:./boost/graph/detail/adjacency_list.hpp:1075:5: note: template<class Config> std::pair<typename Config::edge_descriptor, bool> boost::add_edge(typename Config::vertex_descriptor, typename Config::vertex_descriptor, boost::undirected_graph_helper<C>&)add_edge(typename Config:
:vertex_descriptor u,
./boost/graph/detail/adjacency_list.hpp:1075:5: note: template argument deduction/substitution failed
:workshop.cpp:123:42: note: mismatched types 'boost::undirected_graph_helper<C>' and 'Graph() {aka boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS, VertexProperties, EdgeProperties, GraphProperties>()}'boost:
:add_edge(from, to, testg);
In file included from ./boost/graph/adjacency_list.hpp:246:0,from workshop.cpp:12
:./boost/graph/detail/adjacency_list.hpp:1473:5: note: template<class Config> std::pair<typename Config::edge_descriptor, bool> boost::add_edge(typename Config::vertex_descriptor, typename Config::vertex_descriptor, const typename Config::edge_property_type&, boost::bidirectional_graph_helper_with_property<Config>&)add_edge(typename Config:
:vertex_descriptor u,
./boost/graph/detail/adjacency_list.hpp:1473:5: note: template argument deduction/substitution failed
:workshop.cpp:123:42: note: candidate expects 4 arguments, 3 providedboost:
:add_edge(from, to, testg);
In file included from ./boost/graph/adjacency_list.hpp:246:0,from workshop.cpp:12
:./boost/graph/detail/adjacency_list.hpp:1503:5: note: template<class Config> std::pair<typename Config::edge_descriptor, bool> boost::add_edge(typename Config::vertex_descriptor, typename Config::vertex_descriptor, boost::bidirectional_graph_helper_with_property<Config>&)add_edge(typename Config:
:vertex_descriptor u,
./boost/graph/detail/adjacency_list.hpp:1503:5: note: template argument deduction/substitution failed
:workshop.cpp:123:42: note: mismatched types 'boost::bidirectional_graph_helper_with_property<Config>' and 'Graph() {aka boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS, VertexProperties, EdgeProperties, GraphProperties>()}'boost:
:add_edge(from, to, testg);
In file included from ./boost/graph/adjacency_list.hpp:246:0,from workshop.cpp:12
:./boost/graph/detail/adjacency_list.hpp:2217:5: note: template<class Graph, class Config, class Base> std::pair<typename Config::edge_descriptor, bool> boost::add_edge(typename Config::vertex_descriptor, typename Config::vertex_descriptor,const typename Config::edge_property_type&, boost::vec_adj_list_impl<G, C, B>&)add_edge(typename Config:
:vertex_descriptor u,
./boost/graph/detail/adjacency_list.hpp:2217:5: note: template argument deduction/substitution failed
:workshop.cpp:123:42: note: candidate expects 4 arguments, 3 providedboost:
:add_edge(from, to, testg);
In file included from ./boost/graph/adjacency_list.hpp:246:0,from workshop.cpp:12
:./boost/graph/detail/adjacency_list.hpp:2231:5: note: template<class Graph, class Config, class Base> std::pair<typename Config::edge_descriptor, bool> boost::add_edge(typename Config::vertex_descriptor, typename Config::vertex_descriptor,boost::vec_adj_list_impl<G, C, B>&)add_edge(typename Config:
:vertex_descriptor u,
./boost/graph/detail/adjacency_list.hpp:2231:5: note: template argument deduction/substitution failed
:workshop.cpp:123:42: note: mismatched types 'boost::vec_adj_list_impl<G, C, B>' and 'Graph() {aka boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS, VertexProperties, EdgeProperties, GraphProperties>()}'boost::add_edge(from, to, testg);
您已經成為最煩人的解析的受害者:
Graph testg();
聲明一個函數。 不要難過 我花了一段時間才看到這個。 O
寫吧
Graph testg;
或者,如果您想要的東西幾乎總是能滿足您的意思:
Graph testg {};
確實感到難過
using namespace
(尤其是因為std
和boost
確實引入了重大沖突), new
的文件流... eof()
dataG[dataG.size() -1]
,其中可以使用data.back()
gid
(int)縮小為unsigned int #include <boost/graph/adjacency_list.hpp>
#include <fstream>
#include <iostream>
#include <string>
#include <vector>
using namespace boost;
/*********************************************/
// vertex
struct VertexProperties {
int id;
int label;
VertexProperties(unsigned i=0, unsigned l=0) : id(i), label(l) {}
};
// edge
struct EdgeProperties {
unsigned id;
unsigned label;
EdgeProperties(unsigned i=0, unsigned l=0) : id(i), label(l) {}
};
// Graph
struct GraphProperties {
unsigned id;
unsigned label;
GraphProperties(unsigned i=0, unsigned l=0) : id(i), label(l) {}
};
// adjency list
typedef boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS,
VertexProperties,
EdgeProperties,
GraphProperties> Graph;
// descriptors
typedef boost::graph_traits<Graph>::vertex_descriptor vertex_descriptor;
typedef std::pair<boost::graph_traits<Graph>::edge_descriptor, bool> edge_t;
// iterators
typedef graph_traits<Graph>::vertex_iterator vertex_iter;
typedef graph_traits<Graph>::edge_iterator edge_iter;
int main() {
std::vector<Graph> dataG;
std::ifstream file_reader("5.txt"); // flux d'entrée pour opérer sur les fichiers.
std::string line;
while (std::getline(file_reader, line)) { // getline reads characters from an input stream and places them into a string
char lineType;
std::stringstream ss(line); // use a string buffer that contains a sequence of characters.
if (ss >> lineType) switch (lineType) {
case 't':
{
char diez;
unsigned gid;
if (ss >> diez >> gid) {
dataG.emplace_back(GraphProperties { gid, gid });
}
else throw std::runtime_error("Error parsing '" + line + "'");
}
break;
case 'v':
{
assert(!dataG.empty());
int vId, vLabel;
if (ss >> vId >> vLabel) {
boost::add_vertex(VertexProperties(vId, vLabel), dataG.back());
}
else throw std::runtime_error("Error parsing '" + line + "'");
}
break;
case 'e':
{
assert(!dataG.empty());
int fromId, toId, vLabel;
if (ss >> fromId >> toId >> vLabel) {
// Note that the EdgeProperty.id doesn't make sense with your input data
// as it only contains [vertexFrom vertexTo edgeData]
boost::add_edge(fromId, toId, EdgeProperties(vLabel, vLabel), dataG.back());
}
else throw std::runtime_error("Error parsing '" + line + "'");
}
break;
} else
{
// ignoring empty line
}
}
if (!dataG.empty()) {
auto const& gr = dataG.front(); // no copy
Graph testg;
for (auto ep = edges(gr); ep.first != ep.second; ++ep.first) // ep edge number
{
vertex_descriptor from = source(*ep.first, gr);
vertex_descriptor to = target(*ep.first, gr);
boost::add_edge(from, to, testg);
}
}
std::cout << "fin." << std::endl; // fin du programme.
}
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