Compilare: main.cpp: In function 'void buildPath(short int, short int)': main.cpp:30:28: warning: array subscript has type 'char' [-Wchar-subscripts] new_i = i+row_dir[k]; ^ main.cpp:31:28: warning: array subscript has type 'char' [-Wchar-subscripts] new_j = j+col_dir[k]; ^ main.cpp:49:32: warning: 'from_col' may be used uninitialized in this function [-Wmaybe-uninitialized] v[i][j].from_col = from_col; ^ main.cpp:48:32: warning: 'from_row' may be used uninitialized in this function [-Wmaybe-uninitialized] v[i][j].from_row = from_row; ^