gerrymanderingRatios

Map<string, double> gerrymanderingRatios(const string &file) {
    Map<string, int> countMap;
    Map<string, vector<string>> districtVotes; // district : votes
    Map<string, string> districtWinner;
    Map<string, double> gerryMap;       // party : ratio (returned)
    double totalVotes = 0.0;
    double districtCounter = 0.0;
    double ratio = 0.0;

    ifstream file_in(file);
    if (file_in) {
        string line;
        string districtName;
        string partyVote;
        while (file_in >> districtName, getline(file_in, line)) {
            stringstream ss(line);
            while (ss >> partyVote) {
                try {
                    ++countMap[partyVote];
                }
                catch (out_of_range) {
                    countMap[partyVote] = 1;
                }
                districtVotes[districtName].push_back(partyVote);
                ++totalVotes;
            }
            string winner;
            for (auto looker : districtVotes) {
                sort(districtVotes[districtName].begin(), districtVotes[districtName].end());
                int max = 0;
                for (size_t i = 0; i < districtVotes[districtName].size(); ++i) {
                    int counter = count(districtVotes[districtName].begin(), districtVotes[districtName].end(), districtVotes[districtName][i]);
                    if (counter > max) {
                        max = counter;
                        winner = districtVotes[districtName][i];
                    }
                }
            }
            districtWinner[districtName] = winner;
            ++districtCounter;
        }
    }
    file_in.close();

    Map<string, int>::iterator voteCounter = countMap.begin(); // countMap
    for (; voteCounter != countMap.end(); ++voteCounter) {
        Map<string, string>::iterator partyCounter = districtWinner.begin(); // districtWinner
        int districtsWon = 0;
        for (; partyCounter != districtWinner.end(); ++partyCounter) {
            if (*voteCounter == districtWinner.get(*partyCounter))
                ++districtsWon;
        }
        double percentOfVotes = countMap.get(*voteCounter) / totalVotes; // total votes / # of party votes
        double percentDistrictsWon = districtsWon / districtCounter; // districts won by party / # of districts
        ratio = percentDistrictsWon / percentOfVotes;
        gerryMap[*voteCounter] = ratio;
    }
    return gerryMap;
}