// (c) 2006 Richard Grimes
// www.grimes.demon.co.uk

using System;

public class Verify
{
   unsafe public void strrev(string str)
   {
      fixed (char* p = str)
      {
         char* start = p;
         char* left = p;
         start += str.Length - 1;
         while (left <= start)
         {
            char ch = *left;
            *left++ = *start;
            *start-- = ch;
         }
      }
   }
}