Try this...

std::ofstream expNewResFile1; // define a stream
expNewResFile1.open(("file name").c_str(), std::ios_base::app);

Write to file:

When you received data you can write to the file:

expNewResFile1 << data1 << "\t"<< data2 << " \t"<<......<<\n";
                        
Good Luck.

tahank you very much