Permutation palindrome

#include <iostream>

#include <cstring>

using namespace std;

const int maxsize = 128;

void is_permutationPalindrome(char s[])

{

    char r[maxsize];

    memset(r, 0, maxsize);

    for(int i=0; i<strlen(s); i++)

    {

        r[s[i]] ++;

    }

    

    int num_evens = 0, num_odds = 0;

    

    for(int i=0; i<maxsize; i++)

    {

        if(r[i] %2 == 0)

            num_evens++;

        else

            num_odds++;

    }

    

    if(num_odds == 1 || num_odds == 0)

        cout << "it is a palindrome permutation";

    else

        cout << "it is not a palindrome permutation";

}

int main() {

// your code goes here

char *s = "defer";

is_permutationPalindrome(s);

return 0;

}