Question

when i compile i has an error and i cannot understand where is the problem?

class Edge{  
public:  
      int nid;  
      bool operator==(const Edge& edge) const {  
            return nid == edge.nid;  
      }  
 };  

and problem here

vector<Edge> edges;  
vector<Edge>::iterator it;  
it = find (edges.begin(), edges.end(), nid);

if( it != edges.end() )  
      edges.erase(it); 

any ideas ?!!!?

Answer 1

find will compare (with ==) the objects of type Edge in the vector with nid. I guess that nid is of type int and that won’t work unless you implement operator== between Edge and int.

You can try :

it = find (edges.begin(), edges.end(), Edge(nid));