在c++程序csv文件中添加额外的行？

#include <fstream>

std::ofstream file;
file.open("data.csv", std::ios::app);

file << "Value1,Value2,Value3" << std::endl;

file.close();

#include <fstream>

int main() {
    std::ofstream file;
    file.open("data.csv", std::ios::app);

    file << "Value1,Value2,Value3" << std::endl;

    file.close();

    return 0;
}