there are two ways in which you can achieve your objective.

one is to give a '1' to the uc indicating the switch is ON the other is to give a '0'

case '1':

connect one terminal of the switch to +5v the other end to the uc and one end of a 10k resistor. connect the other end of the resistor to ground.

case '0':

connect one terminal of the resistor to +5v and the other end to the switch and uc. connect the other end of the switch to ground.

note. i have assumed that you will be using push to ON switches.

hope this is of help.