Why aren't you just using

int array[3][4][5][6];
//or
std::vector< std::vector< std::vector< std::vector< /*your Type*/ > > > > array;

Using a naked C++ array is usually bad for this and even if you have to if you use only one array you end up with a uniform grid like array only, jagged arrays wouldn't be possible you would need to use a "type****" for that and the just looks ugly.

Why aren't you just using

int array[3][4][5][6];
//or
std::vector< std::vector< std::vector< std::vector< /*your Type*/ > > > > array;

Why aren't you just using
[code=auto:0]
int array[3][4][5][6];
//or
std::vector< std::vector< std::vector< std::vector< /*your Type*/ > > > > array;
[\code]

Why aren't you just using

int array[3][4][5][6];
//or
std::vector< std::vector< std::vector< std::vector< /*your Type*/ > > > > array;