为什么我得到这个错误，'method'的左边必须有class / struct / union？

Question

I am building three classes, Maze, MazeRow, and MazePoints, to hold a maze structures and I am having trouble with setting up my vector for the MazeRows.The below code is from my Maze class code. I have included my header file for MazeRow. I am getting 3 errors each where i am calling a vector method. Also myMazeRows is a private member variable of Maze Class

//Maze Header File    
#include "MazeRow.h"
#include <vector>
using namespace std;
namespace MazeSolver
{

class Maze
    {
    public:
        Maze(int rows, int columns);
        MazeRow *      getRow(int row);
            private:
                    vector<MazeRow> myMazeRows();

---

 //Maze Implementation File
 #include "stdafx.h"
 #include "Maze.h"
 #include <vector>
using namespace std;
using namespace MazeSolver;


  Maze::Maze(int rows, int columns)
{
     //Recieving the Compile Error  (C2228)
      myMazeRows.resize(rows);

     //Initializing Each Row
     for(int i=0; i< rows;i++) //Recieving the Compile Error  ( C2228 )
           myMazeRows.push_back(MazeRow(i,columns));
}

MazeRow*       Maze::getRow(int row) 
{
    //Recieving the Compile Error (C2228)
    return &myMazeRows.at(row); 
}

---

//Maze Row Header File
class MazeRow
   {

   public:
       MazeRow(int rowNum, vector<MazePoint>);
       MazeRow(int rowNum, int mazPoints);

Answer 1

At least one error the Maze::GetRow() should be:

MazeRow*       Maze::getRow(int row)  
{ 
  return &myMazeRows.at(row);  // note the change from * to &
} 

Another possibly is that your loop in Maze constructor is to i<rows-1 -- most likely should be i<rows . This will not cause compilation error, but runtime problems.

Answer 2

As Attila said, an error can be seen at this function:

MazeRow *Maze::getRow(int row) 
{
    return *myMazeRows.at(row); 
}

If myMazeRows were containing a MazeRow ** , then this would be valid, but You probably meant to take the address of the MazeRow object, like so:

MazeRow *Maze::getRow(int row) 
{
    // Ampersand (&) take the address of the row
    return &myMazeRows.at(row); 
}

For the std::vector errors, make sure you either have using namespace std; at the top of your header file, or are using std::vector , and ensure you have #include <vector> as well.