C++ 无法将参数 1 从 'int**' 转换为 'const int **'

C++ cannot convert argument 1 from 'int**' to 'const int **'

我想以只读模式将 2D pointer/array 传递给函数。我在 1D 情况下尝试了它,它按我想要的方式工作,但对于 2D 阵列它没有!

错误信息是

cannot convert argument 1 from 'int**' to 'const int **'

我的代码在这里

void test_constdpointer(int const** pda){
    cout << "function: \n";
    for (int i = 0; i < 3; i++) {
        cout << pda[i][0] << " " << pda[i][1] << " " << pda[i][2] << "\n";
    }
}

int _tmain(int argc, _TCHAR* argv[])
{
    int **da;
    da = new int*[3];
    for (int i = 0; i < 3; i++) {
        da[i] = new int[3];
    }

    for (int i = 0; i < 3; i++) {
        cout << da[i][0] << " " << da[i][1] << " " << da[i][2] << "\n";
    }
    test_constdpointer(da);
    return 0;
}

您需要在 const 之前获取两个指针级别。

void test_constdpointer(int const* const* pda)