memory.cpp: In function 'void play()':
memory.cpp:8:15: warning: array subscript has type 'char' [-Wchar-subscripts]
    8 |         if(ap[x] > 3)
      |               ^
memory.cpp:9:16: warning: array subscript has type 'char' [-Wchar-subscripts]
    9 |             ap[x] = 0;
      |                ^
memory.cpp:10:17: warning: array subscript has type 'char' [-Wchar-subscripts]
   10 |         if(path[x] > 3)
      |                 ^
memory.cpp:11:18: warning: array subscript has type 'char' [-Wchar-subscripts]
   11 |             path[x] = 0;
      |                  ^
memory.cpp:12:12: warning: array subscript has type 'char' [-Wchar-subscripts]
   12 |         ap[x]++;
      |            ^
memory.cpp:13:15: warning: array subscript has type 'char' [-Wchar-subscripts]
   13 |         if(ap[x] == 1)
      |               ^
memory.cpp:14:18: warning: array subscript has type 'char' [-Wchar-subscripts]
   14 |             path[x] = i;
      |                  ^
memory.cpp:17:29: warning: array subscript has type 'char' [-Wchar-subscripts]
   17 |                 faceup(path[x]);
      |                             ^
memory.cpp:21:29: warning: array subscript has type 'char' [-Wchar-subscripts]
   21 |                 faceup(path[x]);
      |                             ^