C edit function, return vector-CodePudding

May I ask how to modify the vector<CContact>& addContact(const CContact &c) method to pass this assert? Am I correct that the function should return a vector according to the assignment? I am adding reduced important functions.

class CTimeStamp
{
  public:
    CTimeStamp(int year, int month, int day, int hour, int minute, int second);
...
};
        
CTimeStamp::CTimeStamp(int year, int month, int day, int hour, int minute, int second)
  : m_Year(year), m_Month(month), m_Day(day), m_Hour(hour), m_Minute(minute), m_Second(second)
{
}
        
class CContact
{
  public:
    CContact( CTimeStamp date, int numberFirst, int numberSecond );
        
  private:
    CTimeStamp m_Date;
    int m_NumberFirst, m_NumberSecond;
};
        
CContact::CContact( CTimeStamp date, int numberFirst, int numberSecond )
  : m_Date(date), m_NumberFirst(numberFirst), m_NumberSecond(numberSecond)
{
}
        
class CEFaceMask
{
  public:
    vector<CContact>& CEFaceMask::addContact(const CContact &c)
    {
      m_Db.push_back(c);
      return m_Db;
    }
  private:
    vector<CContact> m_Db;     
};
        
int main ()
{
  CEFaceMask test;
  test . addContact ( CContact ( CTimeStamp ( 2021, 1, 12, 12, 40, 10 ), 123456789, 111222333 ) )
       . addContact ( CContact ( CTimeStamp ( 2021, 2, 5, 15, 30, 28 ), 999888777, 555000222 ) );
}

CodePudding user response：

The way your methods are written, you cannot chain addContact() with another addContact() (or any other CEFaceMask method).

Either change the way you are calling addContact() the second time:

 test.addContact ( CContact ( CTimeStamp ( 2021, 1, 12, 12, 40, 10 ), 123456789, 111222333 ) );
 test.addContact ( CContact ( CTimeStamp ( 2021, 2, 5, 15, 30, 28 ), 999888777, 555000222 ) );

or change the signature of addContact() so that it can chain calls:

CEFaceMask& CEFaceMask::addContact(const CContact &c)
{
  m_Db.push_back(c);
  return *this;
}