Thread: VC++ Map

Hi guys,

Can any of you tell me how to use map in C++ please?

Thanks

Sorry, I should post the code earlier. Here's what I'm trying to do:

Code:

void GLMesh::convertToDiffCoord(Mesh *m)
{
	//get the pointer to the list of pointers to all vertices
	list<Vertex*>* v = m->get_vertices();

	//initialize a map that will map each vertex pointer with an unique key
	map<int, Vertex*> VMap;

	//initialize iterator for the pointer list v
	list<Vertex*>::iterator vi;

	//iterate through the list and map each member in the list with a unique value
	for (int i=0; i<v->size(); i++)
		for(vi = v->begin(); vi != v->end(); vi++)
			VMap[i] = v->[i];
}

I keep getting the error :"syntex error '[' ", any idea what's wrong?

Originally Posted by GOBLIN-85

Sorry, I should post the code earlier. Here's what I'm trying to do:

Code:

void GLMesh::convertToDiffCoord(Mesh *m)
{
	//get the pointer to the list of pointers to all vertices
	list<Vertex*>* v = m->get_vertices();

	//initialize a map that will map each vertex pointer with an unique key
	map<int, Vertex*> VMap;

	//initialize iterator for the pointer list v
	list<Vertex*>::iterator vi;

	//iterate through the list and map each member in the list with a unique value
	for (int i=0; i<v->size(); i++)
		for(vi = v->begin(); vi != v->end(); vi++)
			VMap[i] = v->[i];
}

I keep getting the error :"syntex error '[' ", any idea what's wrong?

Probably because v->[i] doesn't make any sense.

just a thought

Code:

v->[i];

should probably be

Code:

*v[i];

im not positive, but that looks wierd to me

Your use of the map is fine.

Your for loops need work. You should only have one loop that increments i and vi together. Then, you probably want VMap[i] = *vi, since vi is an iterator to a list<Vertex*> and so *vi is a Vertex* which is what you're storing in a map.