Compilare: user.c: In function ‘bfs’: user.c:16:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(h[f.x][f.y][f.z] == 0){ ^ user.c:16:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:16:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:17:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(i = 0; i < 6 && h[f.x][f.y][f.z] == 0; i++){ ^ user.c:17:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:17:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c: In function ‘main’: user.c:46:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &m); ^ user.c:47:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &x, &y, &z); ^ user.c:50:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &x, &y, &z); ^ user.c:54:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &x, &y, &z); ^