subs.cpp

/* from vlfeat/mser.c
print: 
-1 -1 -1
 0 -1 -1
 1 -1 -1
 .......
 -1 1 1
  0 1 1
  1 1 1
*/

#include <iostream>

int main()
{
    const int N = 3;
    int ub[N] = { 3, 2, 1 };
    int k = 0;
    int a[N] = { 0, 0, 0 };

    while (true)
    {
        for (int i = 0; i < N; ++i)
        {
            std::cout << a[i] << " ";
        }
        std::cout << std::endl;

        k = 0;
        while (++a[k] > ub[k])
        {
            a[k++] = 0;
            if (k == N)
                return 0;
        }
    }
    return 0;
}