i'm having a problem with below recursive code.
there are 4 chars stored in a array, 'a', 'b', 'c', 'd'. input is between 1 and 16, and output should look like this:

when input is 1:
a
b
c
d

when iput is 2:
aa
ab
ac
ad
ba
bb
bc
bd
ca
cb
cc
cd
da
db
dc
dd

and so on...

here is the code i'v been working with:

where should i change to make it work?

Welcome to GID and Kudo's for a first post and using CODE tags! Thank you!

You neglected to tell us what the problem actually is. Even though telling us what the program should do is important, it's even more important to tell us what it does do because it gives us a starting point to look for.

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I think your problem occurs because everytime you call f, your redeclareing the array temp[]. So basically you place a into temp[x], then call f again. But since f declares a variable called temp[] a is then erased from temp[x] and garbage is in its place. just declare temp in main (or whatever function f is called from) and add it as a peramiter to f so f reads void f(int x, int num, char temp[]) That should help you some.

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