#include <iostream.h>
#include "CPstring.h"

// file: reverse.cc
// author      Dietolf Ramm;  date: 11/13/96
// Function to revers order of characters in a string
// Illustrate addressing of characters in string by subscripts

const int ROWS = 25;
const int COLS = 50;
const char PCHAR = '*';

void ReverseChar(string & str)
// postcondition: characters with the string str have been reversed in
//   order
{
   int k, lng = str.length();
   char c;

   for (k = 0; k < lng/2; k++)
   {
      c = str[k];
      str[k] = str[lng - k - 1];
   }
}

int main()
{
   string s;

   cout << "Enter string (enter to quit)"  << endl;
   getline(cin, s);
   while (s.length() > 0)
   {
      ReverseChar(s);
      cout << "result is: " << s << endl;
      cout << "Enter string (enter to quit)"  << endl;
      getline(cin, s);
   }

   return 0;
}

Sample output:

reverse
Enter string (enter to quit)
Hello
result is: olleH
Enter string (enter to quit)
morgan
result is: nagrom
Enter string (enter to quit)
It was the best of times.
result is: .semit fo tseb eht saw tI
Enter string (enter to quit)