void test1(void){	int number;	cout << ">> pls input a integer number:";	while(cin >> number, !cin.eof())	{		if(cin.bad()) {			cout << "stream has corrupted!" << endl;			return;		} else if (cin.fail()) {			cin.clear();			cin.ignore(std::numeric_limits
     
      ::max(), '\n');			cout << ">> pls input a integer number:";			continue;		}		cout << "number = " << number << endl;	}}