Need help in matrix keypad coding

[skimask]

D. What i want to do is:-
when I pressed switch '1' at keypad the character display on lcd is BUS01,
when I pressed switch '2' at keypad the character display on lcd is BUS02;
when I pressed switch '3' at keypad the character display on lcd is BUS03
...........................................
The problem now, I don't know how to contunie this coding to get what i really want because..................

So what is it that you really want?
Is it what's at the beginning of your post?
What have you tried so far?
What works?
What doesn't work?