Compilare: user.cpp: In function ‘void sift(std::pair<char, char>&, int)’: user.cpp:40:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] swap(a[wh.x][wh.y],a[wh.x+dx[d]][wh.y+dy[d]]); ^ user.cpp:40:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] swap(a[wh.x][wh.y],a[wh.x+dx[d]][wh.y+dy[d]]); ^ user.cpp: In function ‘void move(std::pair<char, char>&, std::pair<char, char>)’: user.cpp:54:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] mk[a.x][a.y] = 1; ^ user.cpp:54:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] mk[a.x][a.y] = 1; ^ user.cpp: In function ‘void move_up(std::pair<char, char>&, std::pair<char, char>&)’: user.cpp:92:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 1; ^ user.cpp:92:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 1; ^ user.cpp:94:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 0; ^ user.cpp:94:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 0; ^ user.cpp:96:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 1; ^ user.cpp:96:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 1; ^ user.cpp: In function ‘void move_right(std::pair<char, char>&, std::pair<char, char>&)’: user.cpp:101:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 1; ^ user.cpp:101:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 1; ^ user.cpp:103:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 0; ^ user.cpp:103:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 0; ^ user.cpp:105:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 1; ^ user.cpp:105:20: warning: array subscript has type ‘char’ [-Wchar-subscripts]