passing a multiple vector

[lukeb]

Hi,

I have a class that generate a 2D vector of String

vector<vector<string> > matrix;

In the same class I have get and set method for that field:

const vector<vector<string> >& getMatrix() const 
{
	return matrix;
}

void setMatrix(const vector<vector<string> >& matrix)
{
	this->matrix = matrix;
}

The matrix i correctly generated but if I try to get that matrix into another class I get an empty vector.

vector<vector<string> > matrix = r.getMatrix();

How can I pass this matrix to other classes?

Thanks

LuKe

[vlad from moscow]

Show the code of the class method where you are trying to do that.

I think that the problem is that you defined a local vector and assigned to it a matrix of an other object. You have to use the member matrix instead of the local matrix. That is instead of

vector<vector<string> > matrix = r.getMatrix();
you have to write

matrix = r.getMatrix();

[o3hC5Di1]

Hi there,

The return type of getMatrix is a reference, but you are returning the actual matrix for as far as I can see.
Try following declarator:

const vector<vector<string> > getMatrix() const

All the best,
NwN

[lukeb]

I've tried both suggestions without success.

[o3hC5Di1]

Could you supply your full (relevant) code please?

All the best,
NwN

[lukeb]

I've solved!

It was my mistake: I had declared two time the same variable!