Reverse a string

The source code for program that can find the reverse of a word given below, copy it in note pad and save it as “.cpp”. Then use suitable compiler to compile it.

/*
 *      
 *      Copyright 2011 techstream.org < techstream.org[at]gmail.com >
 *      
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License as published by
 *      the Free Software Foundation; either version 2 of the License, or
 *      (at your option) any later version.
 *      
 *      This program is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *      GNU General Public License for more details.
 *      
 */

#include
#include      // to use clrscr and getch
void main()
{
        clrscr();
        char str1[20],str2[23];
        int n,m;
        	
        cout<<"enter string";
        cin>>str1;
        n=strlen(str1);
        for(int i=0;i