Two ways, Which one is better?

[HelloDan]

Hello! Long time no see!

The following two fragments, which is better, why?

void oneDialog::function()
{
  QTestDialog* pt= new QTestDialog(this);
  // ........
  delete pt;
}
 
 
 
void oneDialog::function()
{
  QTestDialog dialog(this);
  // ........
 
}

void oneDialog::function()
{
  QTestDialog* pt= new QTestDialog(this);
  // ........
  delete pt;
}



void oneDialog::function()
{
  QTestDialog dialog(this);
  // ........
 
}

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Thanks!