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  1. #include <iostream>
  2. #include <vector>
  3. #include <string>
  4. using namespace std;
  5.  
  6. void PrintArrays (const std::vector<std::vector<std::string>> items)
  7. {
  8.     vector<int> indices;
  9.     int n = items.size();
  10.         indices.resize(items.size(),0);
  11.  
  12.         while (true) //Iterate until we've used all of the last array of items
  13.         {
  14.                 //Print
  15.                 for (int i = 0; i < n; ++i)
  16.                 {
  17.                         cout << items[i][indices[i]] << " ";
  18.                 }
  19.                 cout << endl;
  20.  
  21.                 //Update to the next indice
  22.                 for (int i = n - 1; i >= 0; --i)
  23.                 {
  24.                         indices[i] = (indices[i] + 1) % items[i].size();
  25.                         if (indices[i] != 0)
  26.                         {
  27.                              break;
  28.                         }
  29.                         else if (indices[i] == 0 && i == 0)
  30.                         {
  31.                             return; //Escape.
  32.                         }
  33.                 }
  34.         }
  35.  
  36. }
  37.  
  38. int main() {
  39.  
  40.     vector<vector<string>> lists;
  41.  
  42.  
  43.     lists.resize(4);
  44.     lists[0].push_back("AA");
  45.     lists[0].push_back("BB");
  46.     lists[1].push_back("CC");
  47.     lists[2].push_back("DD");
  48.     lists[2].push_back("EE");
  49.     lists[2].push_back("FF");
  50.     lists[3].push_back("GG");
  51.  
  52.     PrintArrays(lists);
  53.  
  54.         return 0;
  55. }
Success #stdin #stdout 0s 2988KB
comments (?)
stdin
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Standard input is empty
stdout
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AA CC DD GG 
AA CC EE GG 
AA CC FF GG 
BB CC DD GG 
BB CC EE GG 
BB CC FF GG
https://ideone.com/58ARAZ
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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