I am trying to change my code to use something other than structured data as my system does not support the new C++ version. However every time I try to apply a different technique, main one is traditional looping, it either does not work, or gives me an incorrect output.

this is my original code:

std::unordered_map < std::string, std::unordered_map < std::string, int >> wordCounts;
for (const auto & [outerKey, innerMap]: wordCounts) {
    for (const auto & [innerKey, count]: innerMap) {
      if (innerKey == word && count > 0) {
        articlesAppeardIn++;
      }
    }
  }

this is what i tried changing it to

std::unordered_map < std::string, std::unordered_map < std::string, int >> wordCounts;
for (auto outer_pair : wordCounts) {
    for (auto inner_pair : outer_pair.second) {
        if (inner_pair.first == word && inner_pair.second > 0) {
            articlesAppearedIn++;
        }
    }
}

But it gives me complete different results to the first on (which gives me correct output). I fail to see why it gives me a different output.

I tried changing the implementation to a different more traditional approach of loops, and expected the same result, however I receive completely different results to the first approach used.