fork download
copy 
  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4.  
  5. bool increase(const std::vector<std::string>& 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. void do_job(const std::vector<std::string>& v, std::vector<std::size_t>& it)
  20. {
  21.     for (std::size_t i = 0, size = v.size(); i != size; ++i) {
  22.         std::cout << v[i][it[i]];
  23.     }
  24.     std::cout << std::endl;
  25. }
  26.  
  27. void iterate(const std::vector<std::string>& v)
  28. {
  29.     std::vector<std::size_t> it(v.size(), 0);
  30.  
  31.     do {
  32.         do_job(v, it);
  33.     } while (increase(v, it));
  34. }
  35.  
  36. int main()
  37. {
  38.     const std::vector<std::string> v{"b", "ACD", "12"};
  39.     iterate(v);
  40. }
Success #stdin #stdout 0s 4436KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
bA1
bA2
bC1
bC2
bD1
bD2
https://ideone.com/Uke0Kx
language:
C++14 (gcc 8.3)
created:
6 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!