Iterating a boost multi_array

I am having a problem with what I think should be an easy piece of code. I have a 2D array that is N x M, currently stored in a boost multi_array. The N columns represent spatial dimensions e.g. x,y,z and the M rows are points along each dimension.

What I would like to do is print all possible combinations of points along e开发者_JAVA百科ach dimension

For example, if my array is:

-1 -1
 1  1

I want to print:

-1 -1
 1 -1
-1  1
 1  1

I just cant make it work and I always go out of range on the array. I have tried using iterators and accessing the elements as A[i][j], but with no luck. Anyone have any suggestions or thoughts?

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You're likely not resetting the iterators by setting them back to begin(). A better strategy is not reusing the iterators at all. Make them local to the loop that you're using them in.