Sorry.Here's my test.h file

Qt Code: 
  1. #ifndef WIDGET_H
  2. #define WIDGET_H
  3. #include <QWidget>
  4.  
  5. using namespace std;
  6. namespace Ui {
  7. 			class calc;
  8. 		}
  9.  
  10. class calc : public QWidget {
  11. 		Q_OBJECT
  12. 	public:
  13. 		calc(QWidget *parent = 0);
  14. 		~calc();
  15.  
  16.  
  17. 	protected:
  18.  
  19. 	private:
  20. 		Ui::calc *ui;
  21.  
  22. 	private slots:
  23.  
  24. 	public slots:
  25. 		int appendone();
  26. 	};
  27. #endif // WIDGET_H
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I created an object for calc in my C++ file
Qt Code: 
  1. calc c;
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Now I'm getting the following error

Qt Code: 
  1. /home/anil/Tests/Qt/test/test.cpp:10: undefined reference to `calc::calc(QWidget*)'
  2. /home/anil/Tests/Qt/test/test.cpp:10: undefined reference to `calc::~calc()'
  3. collect2: ld returned 1 exit status
  4. make: *** [test] Error 1
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