  We have carried out Monte Carlo simulations of zig-zag shaped molecules where
the the molecules is composed of three rigidly linked hard spherocylinder
arranged in a zigzag fashion. By varying zigzag angle we have mapped out the
whole phase diagram as a function of pressure, molecular density and zigzag
angle $\Psi$. For $\Psi$ between $35^0$ and $80^0$ our model simulation
exhibits SmC phase. This is the first conclusive evidence where steric
interaction arising out of molecular shape alone induce the occurrence of SmC
phase for a wide range of zigzag angle. For smaller $\Psi$, a transition from
tilted crystal (XT) to nontlted crystal is observed.
