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  1. /*.h of base class, the .cpp is empty*/
  2. #ifndef ICDDLIST_H
  3. #define ICDDLIST_H
  4.  
  5.  
  6. template <typename T>
  7. class ICircularDoubleDirectedList
  8. {
  9. public:
  10.     enum direction { FORWARD, BACKWARD };
  11.     virtual direction getCurrentDirection() const = 0;
  12. };
  13.  
  14. #endif
  15.  
  16.  
  17. /*.h of class*/
  18. class CircularDoubleDirectedList:public ICircularDoubleDirectedList<int>
  19. {
  20.     public:
  21.         CircularDoubleDirectedList();
  22.         ~CircularDoubleDirectedList();
  23.  
  24.         direction getCurrentDirection() const;
  25.  
  26.     private:
  27.         direction currentDirection;
  28. };
  29.  
  30. /*.cpp of class*/
  31. #include <iostream>
  32.  
  33. CircularDoubleDirectedList::CircularDoubleDirectedList() {}
  34. CircularDoubleDirectedList::~CircularDoubleDirectedList(){}
  35.  
  36. CircularDoubleDirectedList::direction CircularDoubleDirectedList::getCurrentDirection() const {
  37.     return this->currentDirection;
  38. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
/usr/lib/gcc/i586-linux-gnu/5/../../../i386-linux-gnu/crt1.o: In function `_start':
(.text+0x18): undefined reference to `main'
collect2: error: ld returned 1 exit status
stdout 
Standard output is empty
https://ideone.com/2qpzF3
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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