topcom.c: add missing include

[barvinok.git] / tests / iscc / lattice_width-3

P := [n] -> { [x,y] : x, y >= 0 and x <= n and x - 2y + 2 >= 0 };
R := lattice_width(P);
W := [n] -> { n : 0 <= n <= 2; (1 + 1/2 * n) : n >= 3 };
Z := [n] -> { };
assert((R - W) == Z);