from "mainScreen.h"
Qt Code: 
  1. #ifndef __MAIN_H__
  2. #define __MAIN_H__
  3. #include <QMainWindow>
  4. #include <QApplication>
  5. #include <QPushButton>
  6. #include <QDialog>
  7. #include <cstdlib>
  8. #include "main.cpp"
  9.  
  10. 	// connects the code to the UI
  11. class mainScreen : public :: QDialog, private Ui::mainScreenDLG
  12. 	{
  13. 		Q_OBJECT
  14.  
  15. 	public:
  16. 		mainScreen(QDialog *parent = 0);
  17. 	};
  18.  
  19.  
  20. #endif
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from "mainScreen.cpp"

Qt Code: 
  1. #include <QApplication>
  2. #include <QDataStream>
  3. #include <QtGui>
  4. #include <cstdlib>
  5. #include <ctime>
  6. #include "ui_mainScreen.h"
  7. #include "mainScreen.h"
  8.  
  9.  
  10.  
  11.  
  12. // code to begin the programme
  13. mainScreen::mainScreen(QDialog *parent)
  14.  
  15. {
  16. 		setupUi(this); 
  17.  
  18.  
  19. 	// declaration of variables
  20. 	int operand1, operand2, divisi1, divisi2, sumAnswer, subAnswer, multiAnswer, divisiAnswer, i;
  21. 	bool selectSum, selectSub, selectMulti, selectDivisi;
  22.  
  23. 	// timer for random generator
  24. 	srand (time(0));
  25.  
  26. 		// selects which operations are being used
  27. 		if (selectSum = true)
  28. 		{
  29.  
  30. 			operand1 = rand()/1638 + 1;
  31. 			operand2 = rand()/1638 + 1;
  32. 			lblOperand1.text()->setText(operand1);
  33. 			lblOperand2.text()->setText(operand2);
  34. 			sumAnswer = txtAnswer.text();
  35.  
  36. 		}
  37. 		void mainScreen::on_btnCheck_clicked()
  38. 	{
  39. 	if (selectSum = true)
  40. 	{
  41. 		// if the correct answer is put in, then a message box shows this
  42. 		if (operand1 + operand2 == sumAnswer)
  43. 		{
  44. 			QMessageBox::about(this, "Correct!", "Correct!");
  45. 		}
  46.  
  47. 		// if the incorrect answer is put in, then a message box shows this
  48. 		if (operand1 + operand2 != sumAnswer)
  49. 		{
  50. 			QMessageBox::about(this, "Incorrect", "Incorrect. The correct answer is" + sumAnswer); 
  51. 		}
  52. 	}
  53. };
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i want to make the text of lblOperand1 (which is a QLabel) the value of operand1
but i get the error
Qt Code: 
  1. src/mainScreen.cpp:32: error: request for member ‘text’ in ‘((mainScreen*)this)->mainScreen::<anonymous>.Ui::mainScreenDLG::<anonymous>.Ui_mainScreenDLG::lblOperand1’, which is of non-class type ‘QLabel*’
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i checked and made sure that the label was named and referenced to correctly

i also want to be able to use the "operand1" variable in "void mainScreen:n_btnCheck_clicked()"
but it tells me that the variables "selectSum", "operand1" etc are not declared in that scope?

thankyou in advance!!