Compilare: user.cpp: In function ‘int main()’: user.cpp:15:18: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] fin >> w + 1; ^ user.cpp:29:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[v[a[i][j]]][j2] = a[i][j2]; ^ user.cpp:30:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[a[i][j]] --; ^