memory.cpp: In function 'void play()':
memory.cpp:13:15: warning: array subscript has type 'char' [-Wchar-subscripts]
   13 |         if(ap[x] > 3)
      |               ^
memory.cpp:14:16: warning: array subscript has type 'char' [-Wchar-subscripts]
   14 |             ap[x] = 0;
      |                ^
memory.cpp:15:12: warning: array subscript has type 'char' [-Wchar-subscripts]
   15 |         ap[x]++;
      |            ^
memory.cpp:16:15: warning: array subscript has type 'char' [-Wchar-subscripts]
   16 |         if(ap[x] == 1)
      |               ^
memory.cpp:17:18: warning: array subscript has type 'char' [-Wchar-subscripts]
   17 |             path[x] = i;
      |                  ^
memory.cpp:20:29: warning: array subscript has type 'char' [-Wchar-subscripts]
   20 |                 faceup(path[x]);
      |                             ^
memory.cpp:22:29: warning: array subscript has type 'char' [-Wchar-subscripts]
   22 |                 faceup(path[x]);
      |                             ^
memory.cpp:26:15: warning: array subscript has type 'char' [-Wchar-subscripts]
   26 |         if(ap[x] == 2)
      |               ^
memory.cpp:27:15: warning: 'nr' may be used uninitialized in this function [-Wmaybe-uninitialized]
   27 |             nr++;
      |             ~~^~