在 C++ 中处理巨大的多维数组

However, I'm having trouble figuring out the best way to handle this. I do want this to be in virtual memory, but obviously not on the stack. And I keep making the mistake some how of creating this array on the stack an causing a stack overflow. What I would like to do is below. This is just code that I threw together to give you an example of what I'm doing, I have code with correct syntax on my machine, I just didn't want to clutter the post.

typedef struct modelBlock
{
    // Information about the blocks
} BLOCK;

typedef struct modelGrid
{
    bool empty;

    BLOCK blocksArray[50][50][50];

} GRID;


class Parent
{
     Child* child;
     Parent(void);
}

Parent::Parent()
{
    Child c;
    child = &c;
}

class Child
{
     GRID grids[5][4][5];
}

但是，每次我这样做时，都会导致堆栈溢出(适当的网站选择对吗?).我玩过使用基于指针的数组，但是数据在其范围之外丢失时遇到了很多麻烦.