Answer by João Augusto for c++ vector with object pointers

Since, you didn't posted the code of how you are obtaining the values, compare to this, and try to find your problem...

std::vector<std::vector<Field*> > maze;    // Ini    for(int i = 0; i < MAZE_WIDTH; i++)    {        maze.push_back(std::vector<Field*>());        for(int j = 0; j < MAZE_HEIGHT; j++)         {            maze[i].push_back(new Field());            maze[i][j]->x = i;            maze[i][j]->y = j;        }    }    std::vector<Field*> visited;

// push the field [4,5] in a visited vector

    visited.push_back(maze[4][5]);    // Clean up    for(size_t i = 0; i < maze.size(); i++)    {        for(size_t j = 0; j < maze[i].size(); j++)                  delete maze[i][j];          }