For Q4: I think this is the optimal code

int recurPalin(char *start, char *end)
{
    if (end < start)
        return true;

    if (*start != *end)
        return false;

    return recurPalin(start+1, end-1);
}


-
Azhar.

On Tue, Jul 5, 2011 at 12:21 PM, vikas <mehta...@gmail.com> wrote:

> My program for Q4.
>  // recursively find if a given string is palindrome
>         bool IsPalindrome(string s, int start, int start2, bool flag)
>         {
>             bool flag1 = flag;
>             if (start >= 0 && start2 < (s.Length))
>             {
>                 char c1 = s[start];
>                 char c2 = s[start2];
>                 if (c1.Equals(c2))
>                 {
>                     if (start == 0 && start2 == s.Length - 1) { flag =
> true; }
>                     if (IsPalindrome(s, start - 1, start2 + 1, flag))
>                     {
>                         flag1 = true;
>                     }
>                 }
>             }
>             return flag1;
>         }
>
> while calling
>            if (s.Length % 2 != 0)
>             {
>                 p.IsPalindrome(s, s.Length / 2 - 1, s.Length / 2 + 1,
> false);
>             }
>             else
>             {
>                 p.IsPalindrome(s, s.Length / 2 - 1, s.Length / 2, false);
>
>             }
>
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