Compilare: user.cpp: In function ‘int main()’: user.cpp:31:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(p[a[dr]] != 0) ^ user.cpp:33:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] p[a[dr]]++; ^ user.cpp:37:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] p[a[dr]]++; ^ user.cpp:52:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] p[a[st]]--; ^ user.cpp:53:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(p[a[st]] == 0) ^