freopen("log.txt", "w", stdout);

cout << "Welcome to GESP!" << endl;

fclose(stdout);

std::ofstream outFile("log.txt");

outFile << "Welcome to GESP!" << endl;

outFile.close();

std::ofstream outFile("log.txt");

cout << "Welcome to GESP!" << endl;

outFile.close();

ofstream log_file("log.txt");

streambuf* org_cout = cout.rdbuf();

cout.rdbuf(log_file.rdbuf());

cout << "This output will go to the log file." << endl;

cout.rdbuf(oorg_cout);