/************************************
Write a program that reads in two strings
from the user and tells the user whether
one is a reverse of the other.
************************************/
#include <iostream>
#include <string>
using namespace std;

bool reverses(string s1, string s2);

int main()
{
  // Get strings A and B
  string A, B;
  cout << "Enter string one: ";
  cin >> A;
  cout << "Enter string two: ";
  cin >> B;
  
  // Print whether A and B are reverses
  cout << "Strings are ";
  if (!reverses(A,B))
    cout << "not ";
  cout << "reverses of one another!" << endl;
  
  return 0;
}

// Returns true if s1 and s2 are "reverses" of one another
// functino returns bool call "predicate"
bool reverses(string s1, string s2)
{

	if (s1.length() != s2.length() )
	{
		return false;
	}

	int index1 = 0;
	int index2 = s2.length()-1;

	while (index1 < s1.length())  
	{
		if (s1[index1] != s2[index2]) 
		{
			return false; // not reverses
		}

		// move indices
		index1++;
		index2--;
	}

	// if make it here, it's a match
    return true;
}