如何解决C++大数据开发中的数据采集问题?

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#include <iostream>

#include <fstream>

#include <sstream>

#include <vector>

struct DataPoint {

    std::string label;

    std::vector<double> features;

};

std::vector<DataPoint> readCSV(const std::string& filename) {

    std::vector<DataPoint> data;

    std::ifstream file(filename);

    std::string line;

    while (std::getline(file, line)) {

        std::istringstream iss(line);

        std::string label;

        std::string featureStr;

        std::vector<double> features;