int main()
{
Timestamp timestamp = Timestamp::now();
cout << sizeof(A) << endl << sizeof(B) << endl; //1 ,8
cout << sizeof(C) << endl;//windowsƽ̨Ϊ16
cout << "sizeof(copyable):"<<sizeof(copyable)<<endl;
cout << "sizeof(timestamp)"<<sizeof(timestamp) << endl;
cout << endl << endl;
cout << "time seocnds:" << timestamp.secondsSinceEpoch() << endl;
string str = timestamp.toFormattedString();
cout << str << endl;
}
