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C/C++ Source or Header  |  1994-09-05  |  309b  |  21 lines
  1. LISTING 8 - The Field abstract class
  2. // field.h: Abstract class for data-entry fields
  3. #ifndef FIELD_H
  4. #define FIELD_H
  5.  
  6. #include <iostream.h>
  7.  
  8. class Field
  9. {
  10. public:
  11.     virtual ~Field() = 0;  // pure virtual function
  12. };
  13.  
  14. inline Field::~Field()
  15. {
  16.     cout << "~Field()" << endl;
  17. }
  18.  
  19. #endif
  20.  
  21.