Introduction - If you have any usage issues, please Google them yourself
Implemented with vector (vector) opened a two-dimensional dynamic three-dimensional array, the memory address where the distribution of elements in the vector are also two-dimensional array with dual pointers achieve the same characteristics. But with the vector approach than simply using double pointer, will be safer when allocating memory space, the array initialization code more simple, so I recommend using the STL vector to achieve variable-length multidimensional arrays.