I read data from file, line by line, and each will be stored as an element in a vector.
std::vector<one_screw*> m_recorded_screw;
Here is the code:
Qt Code: 
  1. typedef struct{
  2. 	int id;
  3. 	QString name;
  4. 	float x;
  5. 	float y;
  6. 	float z;
  7. 	float dis;
  8. 	QString checked;
  9. 	QString tool;
  10. }one_screw;
  11.  
  12. void read_file(...)
  13. {
  14. QTextStream in(&file);
  15. for( QString line = in.readLine(); !line.isNull(); line = in.readLine()) 
  16. {   
  17.     line = line.trimmed();
  18.     one_screw *a_screw;
  19.  
  20.     QStringList list = line.split(" ", QString::SkipEmptyParts);
  21.  
  22.    a_screw->id = list.at(0).toInt();
  23.    a_screw->name = list.at(1);   //->prolem
  24.    a_screw->x = list.at(2).toFloat();
  25.    a_screw->y = list.at(3).toFloat();
  26.    a_screw->z = list.at(4).toFloat();
  27.    a_screw->dis = list.at(5).toFloat();
  28.    a_screw->checked = list.at(6); //->prolem
  29.    a_screw->tool = list.at(7); //->prolem
  30.  
  31.    m_recorded_screw.push_back(a_screw);
  32. }
  33. }
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I am not sure whether I must use iterator to access the QStringList element. But for the marked lines I have run-time error "Access violation writing location...". In the struct I cannot use QString? Or I use QStringList wrongly? Help!