Insert Timestamp C++

if ((choice_date == "y") || (choice_date == "Y")) {

    if (manualTimestamp.tm_mon < 10) {
        if (manualTimestamp.tm_mday < 10) {
            cout << "Date: " << manualTimestamp.tm_year << "-0" << manualTimestamp.tm_mon << "-0" << manualTimestamp.tm_mday << " " << manualTimestamp.tm_hour << ":" << manualTimestamp.tm_min << ":" << manualTimestamp.tm_sec << endl;
        }
        else {
            cout << "Date: " << manualTimestamp.tm_year << "-0" << manualTimestamp.tm_mon << "-" << manualTimestamp.tm_mday << " " << manualTimestamp.tm_hour << ":" << manualTimestamp.tm_min << ":" << manualTimestamp.tm_sec << endl;
        }

    }
    else {
        if (manualTimestamp.tm_mday < 10) {
            cout << "Date: " << manualTimestamp.tm_year << "-" << manualTimestamp.tm_mon << "-0" << manualTimestamp.tm_mday << " " << manualTimestamp.tm_hour << ":" << manualTimestamp.tm_min << ":" << manualTimestamp.tm_sec << endl;
        }
        else {
            cout << "Date: " << manualTimestamp.tm_year << "-" << manualTimestamp.tm_mon << "-" << manualTimestamp.tm_mday << " " << manualTimestamp.tm_hour << ":" << manualTimestamp.tm_min << ":" << manualTimestamp.tm_sec << endl;
        }
    }

}
else {

}