Permutation with Repetition

#include <iostream>using namespace std;
int ans=0;
void swap(char &a,char &b)
{
char s;
s=a;
a=b;
b=s;
}

bool f(char list[],int k,int i)
{
if(i>=k)
{
for(int t=k;t<i;t++)
if(list[t]==list[i])
return false;
return true;
}
}
void perm(char list[],int k,int m)
{

if(k==m)
{
 ans++;
for(int i=0;i<=m;i++)
cout<<list[i];
cout<<endl;
}