[如何在C ++中仅使用迭代器来正确地迭代3D向量？ [关闭]

Question

我有以下main（）程序-

int main() { vector<vector<vector<int> > > vec; vector<vector<int> > vv; vector<int> ve; //fill vectors for (int i = 0; i < 5; i++) { //vector<vector<int> > vv; for (int j = 0; j < 10; j++) { //vector<int> ve; for (int t = 0; t < 3; t++) { ve.push_back(t); } vv.push_back(ve); } vec.push_back(vv); } for (vector<vector<vector<int> > >::iterator it = vec.begin(); it != vec.end(); it++) { for (vector<vector<int> >::iterator it2 = vv.begin(); it2 != vv.end(); it2++) { for (vector<int>::iterator it3 = it2->begin(); it3 != it2->end(); it3++) { cout << *it3 << " "; } cout << endl; } cout << endl; } return 0; }

我只想使用迭代器来遍历3D向量（而不是i，j变量等）。 如何正确执行此操作？ 
看来我的实现不正确，即：
for (vector<vector<vector<int> > >::iterator it = vec.begin(); it != vec.end(); it++)
{
    for (vector<vector<int> >::iterator it2 = vv.begin(); it2 != vv.end(); it2++)
    {
        for (vector<int>::iterator it3 = it2->begin(); it3 != it2->end(); it3++)
        {
            cout << *it3 << " ";
        }
        cout << endl;
    }
    cout << endl;
}

如何仅在循环中使用迭代器才能正确实现它？

编译器和操作系统详细信息：Microsoft Visual Studio Enterprise 2019（版本16.2.1）。我正在构建x86调试。 64位操作系统，基于x64的处理器。 Windows版本= Windows 10专业版。

Note
：我认为实现不正确，因为该程序在控制台上产生了非常长的输出（我不能在控制台上粘贴所有字符，因为Body限制为3000个字符（当时我是39634）。以下是控制台上的输出：0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 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