Bayes classifier not working.

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int main() { cv::Ptr<cv::ml::normalbayesclassifier> classifier = cv::ml::NormalBayesClassifier::create();

ifstream myfile("positive.txt");

// new lines will be skipped unless we stop it from happening:    
myfile.unsetf(std::ios_base::skipws);

// count the newlines with an algorithm specialized for counting:
unsigned line_count = std::count(
    std::istream_iterator<char>(myfile),
    std::istream_iterator<char>(),
    '\n');

myfile.open("positive.txt");
cout << line_count;
string line;
string img_location;
Mat trainData;
Mat labels;

myfile >> line;

int num = line_count;
for (int i = 0; i < num; i++)
{

    cout << line << endl;
    Mat src = imread(line, 1);

    if (!src.empty())
    {

        src = src.reshape(1, 1);

        //cvtColor(src, src, CV_32S);
        src.convertTo(src, CV_32FC1);


        trainData.push_back(src);


        labels.push_back(1);

        myfile >> line;
    }

}

trainData.convertTo(trainData, CV_32FC1);
//cout << labels. << endl;
labels.convertTo(labels, CV_32FC1);
classifier->train(trainData, cv::ml::ROW_SAMPLE,labels);
classifier->save("bayes.xml");






cout << "Done" << endl;


return 0;

}