Check for string rotation

Check if string s2 is a rotation of string s1. Example: "efulhop" is a rotation of "hopeful"

/*

 * RotationCheck.cpp

 *

 *  Created on: Apr 13, 2012

 *      Author: Kiran Hegde

 */

#include <iostream>

#include <string>

#include <vector>

using namespace std;

/**

 * Return true if s1 and s2 are just rotations of each other

 */

bool checkIfRotation(string s1, string s2) {

    if (s1.length() != s2.length())

        return false;

    string s1s1 = s1.append(s1);

    if (s1s1.find(s2) != string::npos)

        return true;

    return false;

}

/**

 * Test the function

 */

int main() {

    string s1 = "chariot";

    string s2 = "riotcha";

    cout << s2 << (checkIfRotation(s1, s2)? " IS ": " IS NOT ") \

            << " rotation of " << s1 << endl;

    s1 = "nowhere";

    s2 = "onwhere";

    cout << s2 << (checkIfRotation(s1, s2)? " IS ": " IS NOT ") \

                << " rotation of " << s1 << endl;

    return 0;

}