  In order to explore how superconductivity arises when charge fluctuations and
spin fluctuations coexist, we have obtained a phase diagram against the
off-site repulsion V and band filling n for the extended, repulsive Hubbard
model on the square lattice with the fluctuation exchange approximation. We
have found the existence of (i) a transition between dxy and dx2-y2 pairing
symmetries, (ii) f-pairing in between the dx2-y2 and CDW phases for
intermediate 0.5<n<1.0 and large V, and (iii) for anisotropic cases the pairing
symmetry changing, in agreement with a previously proposed ``generic phase
diagram", as d -> f -> s when V (hence the charge fluctuations) are increased.
All these are consequences of the structure in the charge and spin
susceptibilities, which have peaks habitating at the common or segregated
positions in k space.
