C++ 文件保存

文件保存：

#include <sstream>
#include <fstream>
using namespace std;

/*save to path ./record/ */
static void save_to_file(string file, string str) {
    ofstream outfile;
    outfile.open("record/" + file, ios::binary | ios::app | ios::in | ios::out);
    outfile << str;
    outfile.close();
}

string组合：

ostringstream oss;

end