Compilare: user.cpp: In function ‘void borderare()’: user.cpp:39:47: warning: operation on ‘a[(n + 1)][i]’ may be undefined [-Wsequence-point] a[0][i]=a[n+1][i]=a[i][0]=a[n+1][i]=-1; ^ user.cpp: In function ‘void lee()’: user.cpp:58:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (a[y.l][y.c]==0) ^ user.cpp:58:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (a[y.l][y.c]==0) ^ user.cpp:60:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[y.l][y.c] = a[x.l][x.c]+1; ^ user.cpp:60:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[y.l][y.c] = a[x.l][x.c]+1; ^ user.cpp:60:33: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[y.l][y.c] = a[x.l][x.c]+1; ^ user.cpp:60:38: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[y.l][y.c] = a[x.l][x.c]+1; ^