Reverse fucntion

[tinhnho]

hi everyone

please tell me where did i go wrong,Thanks first.The question:
Write the function:

 Void reverse(char s[], char s1[]);

The string s and s1 must be the same size.String s1 should be come a reversed copy of string s.Ex:
in put : My name is Jessica
out put: caissej si eman yM


Here what i have done so far:

#include <iostream>
#include <cstdlib>

class reverse{
public:
  void reset() {top = EMPTY;}
  void push(char c) { top++; s[top] =c;}
  char pop() {return s[top--];}
  char top_of() const { return s[top];}
  bool empty() const {return (top ==EMPTY);}
  bool full() const {return (top ==FULL);}
private:
  enum {max_len =100, EMPTY =-1,FULL = max_len-1};
  char s[max_len];
  int top;
};
int main()
{
  reverse s;
  int i;
  char s1;
  cout << "enter a sentence",
  cin >> s1;
  s.reset();
  while (s1[i] && !s.full())
     s.push(s1[i++]);
  while  (!s.empty())
     cout << s.pop();
  cout << endl;
  system("PAUSE");
  return 0;
}