Compilare: user.cpp: In function ‘void sift(std::pair<char, char>&, int)’: user.cpp:41:16: 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:41:22: 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:55:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] mk[a.x][a.y] = 1; ^ user.cpp:55:16: 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:93:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 1; ^ user.cpp:93:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 1; ^ user.cpp:95:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 0; ^ user.cpp:95:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 0; ^ user.cpp:97:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 1; ^ user.cpp:97:20: 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:102:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 1; ^ user.cpp:102:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 1; ^ user.cpp:104:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 0; ^ user.cpp:104:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 0; ^ user.cpp:106:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] locked[b.x][b.y] = 1; ^ user.cpp:106:20: warning: array subscript has type ‘char’ [-Wchar-subscripts]