c - Generating combinations of multiple sets -

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I am looking for a non-recursive algorithm or C code so that all the combinations of all sets can be made (sure Not to mention that this is the correct scientific name). For example:

I have a set of N = 2 symbols: 

  1 set: [A, Y, Z] 2 set: [1, Q] < / Code>

should be output: 

  A1 AQ Y1 YQ Z1 ZQ

N may be different, the number of symbols Thanks in advance for any assistance in the special set of! :)

By algorithm:

We can create an integer array, whose Select length N, int [] to track [n] to see how many elements we have selected in all the lists. All elements are initially set to 0

Then we repeat those all arrows through a list of single links. If we have an element in the array i , then select [i] ++ , add it to the result when [i] == select the length of the array, So break and move on to the next array.

But I do not know that every time we repeat through an array, the size of the result will be expanded.

If you have thought of this, please let me know.


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