C++ building a class with 2 dimensional vectors?

I'm trying to get some framework off the ground for a project involving drawing a game board using 2D vectors. This is an early framework....All I want is to get something to compile. Let's just say for now I want a 5 X 5 matrix. I can't quite get the call part to work so it will compile. Can someone who is good with C++ look at this code and tell me whats wrong. Thanks.





#include%26lt;iostream%26gt;


#include%26lt;vector%26gt;


using namespace std;





class georgeClass


{


private:


vector%26lt;vector%26lt;int%26gt; %26gt; myVec;//sets up multi D vector


public:


georgeClass(int);


void printRow(int);


};





georgeClass::georgeClass(int x)


{


vector %26lt;int%26gt; row(x,0);


for(int i=0;i%26lt;x;i++)


myVec.push_back(row);


for(int j=0;j%26lt;x;j++)


myVec[i][j]=i+j;


}


void georgeClass::printRow(int r)


{


for(int i=0;i%26lt;myVec[r].size();i++)


cout%26lt;%26lt;myVec[r][i]%26lt;%26lt;endl;//I don't what it fills up with for now


}


int main()


{int x=5;// should tell constructor to make a 5X5 matrix


georgeClass vec(x);


int r;


cout%26lt;%26lt; vec.printRow(r);//%26lt;-----something wrong here???????????????





}

C++ building a class with 2 dimensional vectors?
The problem is PrintRow() returns void. You're trying to put void into cout, and that object definitely won't have overloaded the %26lt;%26lt; operator to take void.





Your PrintRow() functions prints out the row internally. Change "cout%26lt;%26lt; vec.printRow(r);" to "vec.printRow(r);".





Hope this helps. I haven't checked for any other errors, so it may still fail to compile.
Reply:First, without the errors it's hard to tell what's wrong. Why don't you use a 2D array instead.. or use a single Vector thats (height * width) long, and index the item you want by using J*width+i or similar.