program volatile_doctest use vecfor_R8P type(vector_R8P) :: pt(0:4) pt(1) = ex_R8P pt(2) = ey_R8P pt(3) = ex_R8P - ey_R8P pt(4) = ex_R8P + ey_R8P pt(0) = face_normal4_R8P(pt1=pt(1), pt2=pt(2), pt3=pt(3), pt4=pt(4), norm='y') print "(3(F3.1,1X))", abs(pt(0)%x), abs(pt(0)%y), abs(pt(0)%z) endprogram volatile_doctest