fork(2) download 
  1. #include <iostream>
  2. #include <vector>
  3.  
  4. template <typename T>
  5. bool increase(const std::vector<std::vector<T>>& v, std::vector<std::size_t>& it)
  6. {
  7.     for (std::size_t i = 0, size = it.size(); i != size; ++i) {
  8.         const std::size_t index = size - 1 - i;
  9.         ++it[index];
  10.         if (it[index] == v[index].size()) {
  11.             it[index] = 0;
  12.         } else {
  13.             return true;
  14.         }
  15.     }
  16.     return false;
  17. }
  18.  
  19. template <typename T>
  20. void do_job(const std::vector<std::vector<T>>& v, std::vector<std::size_t>& it)
  21. {
  22.     for (std::size_t i = 0, size = v.size(); i != size; ++i) {
  23.         std::cout << v[i][it[i]] << " ";
  24.     }
  25.     std::cout << std::endl;
  26. }
  27.  
  28. template <typename T>
  29. void iterate(const std::vector<std::vector<T>>& v)
  30. {
  31.     std::vector<std::size_t> it(v.size(), 0);
  32.  
  33.     do {
  34.         do_job(v, it);
  35.     } while (increase(v, it));
  36. }
  37.  
  38. int main(int argc, char *argv[])
  39. {
  40.     std::vector<std::vector<int>> v = {
  41.         {0, 1, 2, 3, 4, 5},
  42.         {0, 1, 2, 3, 4, 5},
  43.         {0, 1, 2, 3, 4, 5}
  44.     };
  45.  
  46.     iterate(v);
  47.     return 0;
  48. }
  49.  
Success #stdin #stdout 0s 3432KB
comments (?)
stdin 
Standard input is empty
stdout 
0 0 0 
0 0 1 
0 0 2 
0 0 3 
0 0 4 
0 0 5 
0 1 0 
0 1 1 
0 1 2 
0 1 3 
0 1 4 
0 1 5 
0 2 0 
0 2 1 
0 2 2 
0 2 3 
0 2 4 
0 2 5 
0 3 0 
0 3 1 
0 3 2 
0 3 3 
0 3 4 
0 3 5 
0 4 0 
0 4 1 
0 4 2 
0 4 3 
0 4 4 
0 4 5 
0 5 0 
0 5 1 
0 5 2 
0 5 3 
0 5 4 
0 5 5 
1 0 0 
1 0 1 
1 0 2 
1 0 3 
1 0 4 
1 0 5 
1 1 0 
1 1 1 
1 1 2 
1 1 3 
1 1 4 
1 1 5 
1 2 0 
1 2 1 
1 2 2 
1 2 3 
1 2 4 
1 2 5 
1 3 0 
1 3 1 
1 3 2 
1 3 3 
1 3 4 
1 3 5 
1 4 0 
1 4 1 
1 4 2 
1 4 3 
1 4 4 
1 4 5 
1 5 0 
1 5 1 
1 5 2 
1 5 3 
1 5 4 
1 5 5 
2 0 0 
2 0 1 
2 0 2 
2 0 3 
2 0 4 
2 0 5 
2 1 0 
2 1 1 
2 1 2 
2 1 3 
2 1 4 
2 1 5 
2 2 0 
2 2 1 
2 2 2 
2 2 3 
2 2 4 
2 2 5 
2 3 0 
2 3 1 
2 3 2 
2 3 3 
2 3 4 
2 3 5 
2 4 0 
2 4 1 
2 4 2 
2 4 3 
2 4 4 
2 4 5 
2 5 0 
2 5 1 
2 5 2 
2 5 3 
2 5 4 
2 5 5 
3 0 0 
3 0 1 
3 0 2 
3 0 3 
3 0 4 
3 0 5 
3 1 0 
3 1 1 
3 1 2 
3 1 3 
3 1 4 
3 1 5 
3 2 0 
3 2 1 
3 2 2 
3 2 3 
3 2 4 
3 2 5 
3 3 0 
3 3 1 
3 3 2 
3 3 3 
3 3 4 
3 3 5 
3 4 0 
3 4 1 
3 4 2 
3 4 3 
3 4 4 
3 4 5 
3 5 0 
3 5 1 
3 5 2 
3 5 3 
3 5 4 
3 5 5 
4 0 0 
4 0 1 
4 0 2 
4 0 3 
4 0 4 
4 0 5 
4 1 0 
4 1 1 
4 1 2 
4 1 3 
4 1 4 
4 1 5 
4 2 0 
4 2 1 
4 2 2 
4 2 3 
4 2 4 
4 2 5 
4 3 0 
4 3 1 
4 3 2 
4 3 3 
4 3 4 
4 3 5 
4 4 0 
4 4 1 
4 4 2 
4 4 3 
4 4 4 
4 4 5 
4 5 0 
4 5 1 
4 5 2 
4 5 3 
4 5 4 
4 5 5 
5 0 0 
5 0 1 
5 0 2 
5 0 3 
5 0 4 
5 0 5 
5 1 0 
5 1 1 
5 1 2 
5 1 3 
5 1 4 
5 1 5 
5 2 0 
5 2 1 
5 2 2 
5 2 3 
5 2 4 
5 2 5 
5 3 0 
5 3 1 
5 3 2 
5 3 3 
5 3 4 
5 3 5 
5 4 0 
5 4 1 
5 4 2 
5 4 3 
5 4 4 
5 4 5 
5 5 0 
5 5 1 
5 5 2 
5 5 3 
5 5 4 
5 5 5
https://ideone.com/1Xmc9b
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!