C++写文件夹

#include <fstream>
using namespace std;
int main() {
　　ofstream outFile;
　　outFile.open("D:\\gaoyu.txt");
　　outFile << "this is a c++ file write test.";
　　outFile.close();
　　return 0;
}

ofstream ofs(path + "/result.txt", ios::out | ios_base::binary);
string line2 = "";
line2.append("\t阈值    ").append("\ttpr(1-frr)    ").append("\tfpr(far)    ").append("\t准确率\n");
ofs.write(line2.data(), line2.length());
ofs.flush();
ofs.close();