using QPair in QVector

[damonlin]

Dear All:
I use QPair in QVector when developing .
But there's some problem.
here is text example:

void test()
{
   QVector< QPair< int , QString > > first;
   QVector< QPair< int , QString > > second;
 
   for(int iIdx = 0; iIdx <5 ; ++iIdx )
       first.push_back(QPair< int , QString >(iIdx , "aaa") );
 
   qCopy(first.begin(), first.end(), second.begin()); // it occurred errors
}

void test()
{
   QVector< QPair< int , QString > > first;
   QVector< QPair< int , QString > > second;

   for(int iIdx = 0; iIdx <5 ; ++iIdx )
       first.push_back(QPair< int , QString >(iIdx , "aaa") );

   qCopy(first.begin(), first.end(), second.begin()); // it occurred errors
}

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Is there any suggestion for me if I would like to copy from one vector to another ??
Thank you~~