Yardım Char.cpp Error

char.cpp: In member function 'int CHARACTER::AddGiftGridItem(int, int)':
char.cpp:945:17: error: invalid use of incomplete type 'class CGrid'
  945 |  int iPos = grid->FindBlank(1, size);
      |                 ^~
In file included from char.cpp:18:
exchange.h:4:7: note: forward declaration of 'class CGrid'
    4 | class CGrid;
      |       ^~~~~
char.cpp:950:11: error: invalid use of incomplete type 'class CGrid'
  950 |  if (!grid->IsEmpty(iPos, 1, size))
      |           ^~
In file included from char.cpp:18:
exchange.h:4:7: note: forward declaration of 'class CGrid'
    4 | class CGrid;
      |       ^~~~~
char.cpp:954:6: error: invalid use of incomplete type 'class CGrid'
  954 |  grid->Put(iPos, 1, size);
      |      ^~
In file included from char.cpp:18:
exchange.h:4:7: note: forward declaration of 'class CGrid'
    4 | class CGrid;
      |       ^~~~~
char.cpp: In member function 'void CHARACTER::RefreshGift()':
char.cpp:983:27: error: invalid use of incomplete type 'class CGrid'
  983 |  grid = M2_NEW CGrid(15, 8);
      |                           ^
In file included from char.cpp:18:
exchange.h:4:7: note: forward declaration of 'class CGrid'
    4 | class CGrid;
      |       ^~~~~
char.cpp:984:6: error: invalid use of incomplete type 'class CGrid'
  984 |  grid->Clear();
      |      ^~
In file included from char.cpp:18:
exchange.h:4:7: note: forward declaration of 'class CGrid'
    4 | class CGrid;
      |       ^~~~~
char.cpp:1016:9: error: invalid use of incomplete type 'class CGrid'
 1016 |     grid->Clear();
      |         ^~
In file included from char.cpp:18:
exchange.h:4:7: note: forward declaration of 'class CGrid'
    4 | class CGrid;
      |       ^~~~~
In file included from stdafx.h:10,
                 from char.cpp:1:
debug_allocator.h:157:31: warning: possible problem detected in invocation of delete operator: [-Wdelete-incomplete]
  157 | #define M2_DELETE(p) delete (p)
      |                               ^
char.cpp:1028:3: note: in expansion of macro 'M2_DELETE'
 1028 |   M2_DELETE(grid);
      |   ^~~~~~~~~
char.cpp:1028:13: warning: invalid use of incomplete type 'class CGrid'
 1028 |   M2_DELETE(grid);
debug_allocator.h:157:30: note: in definition of macro 'M2_DELETE'
  157 | #define M2_DELETE(p) delete (p)
      |                              ^
In file included from char.cpp:18:
exchange.h:4:7: note: forward declaration of 'class CGrid'
    4 | class CGrid;
      |       ^~~~~
In file included from stdafx.h:10,
                 from char.cpp:1:
debug_allocator.h:157:31: note: neither the destructor nor the class-specific operator delete will be called, even if they are declared when the class is defined
  157 | #define M2_DELETE(p) delete (p)
      |                               ^
char.cpp:1028:3: note: in expansion of macro 'M2_DELETE'
 1028 |   M2_DELETE(grid);
      |   ^~~~~~~~~
At global scope:
cc1plus: warning: unrecognized command line option '-Wno-volatile'
gmake[1]: *** [Makefile:182: .obj/char.o] Error 1