generate all subsets of size k from a set

Question

I want to generate all the subsets of size k from a set.

eg:-say I have a set of 6 elements, I have to list all the subsets in which the cardinality of elements is 3

Answer 1

#include 
void g(int s[],int p,int k,int t[],int q=0,int r=0)
{
    if(q==k)
    {
        for(int i=0;i