Getting 0-9 digits by using potentiometer

hi,

i would like to use analog port of 16f877 to get digits chosen by a
user using potentiometer. First of all i wonder whether such a one-turn
potentiometers are used for that purpose. Generally i have seen dip
switches or BCD switches, however one should use so many pins of pic
for getting a single digit. To make the matter more clear, the user
will choose a number by turning the one-turn potentiometer; lets say it
is "6" and 2.2 V [10111011] obtained by the analog port of the pic. If
that binary that is in the range of "6" a variable in the pic will be
set to 6 [00000110].

It seems pretty easy at first look, but i do not know the reliability
of the system. Does anyone help me in understanding possible failure of
that application ? and have they ever seen a smd one-turn potentiometer
with 10-step resistor [ i mean when you turn it becomes 0 - 1k ohm - 2
ohm - 3 ohm -....10k ohm]

.

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