c++ csv逗号分隔的文件条目，混合类型的问题

#include <iostream>
#include <fstream>
#include <sstream>
#include <vector>
#include <string>

struct CSVRecord {
    std::string col1;
    int col2;
    float col3;
};

std::vector<CSVRecord> parseCSV(const std::string& filename) {
    std::vector<CSVRecord> records;
    std::ifstream file(filename);
    std::string line;

    while (std::getline(file, line)) {
        std::stringstream ss(line);
        std::string token;
        CSVRecord record;

        std::getline(ss, token, ',');
        record.col1 = token;

        std::getline(ss, token, ',');
        record.col2 = std::stoi(token);

        std::getline(ss, token, ',');
        record.col3 = std::stof(token);

        records.push_back(record);
    }

    return records;
}

int main() {
    std::vector<CSVRecord> records = parseCSV("data.csv");

    for (const auto& record : records) {
        std::cout << "Column 1: " << record.col1 << std::endl;
        std::cout << "Column 2: " << record.col2 << std::endl;
        std::cout << "Column 3: " << record.col3 << std::endl;
        std::cout << "-----------------------" << std::endl;
    }

    return 0;
}