A summary of a couple of longer posts.

Ralph Corderoy and I used different C syntax than to access an MxN array A, whose subscripts begin at M0 and N0 in the respective dimensions. Here's a somewhat simplified version of both. In our examples, M0 and M0 were negative.

Mine:

int base[M][N];

#define A(i,j) base[i-M0][j-N0]

Ralph's

int base[M][N];

int (*A)[N] = (int(*)[N])&base[-M0][-N0];

In my scheme element references must be written A(i,j). Ralph retains C array syntax, A[i][j].

Doug