// Corey Williams
// COP3530 01Z
// Project 8 Recursion

/*

Write a  C/C++ or Java application that uses a "vector" container to store 10 strings and a recursive function/method
"isPalindrome" (i.e., must be written) to determine whether a string argument is a palindrome.
The application must perform the following.

    - Prompt the user for the 10 strings, storing in a "vector" container
    - Uses a loop to call "isPalindrome" passing it one of the strings from the "vector"
    - Display message with the string and results of the palindrome test
*/

#include <iostream>
#include <vector>
#include <string>

using namespace std;

//Takes arguments of string vector by reference and element to check.
void isPalindrome(vector<string>& strVec, vector<string>::iterator i) {
    
    //Makes copy of vector string element being tested and reverses 
    string revStr = *i;
    reverse(revStr.begin(), revStr.end());

    //If the reversed string is true, this means the string is a palidrome (same forward and backward). Prints test string and result.
    cout << endl << "String:\t" << *i << "\tIs Palindrome: ";
    if (*i == revStr) { cout << "TRUE"; }
    else { cout << "FALSE"; }

    //increments iterator, tests if there are more elements, and calls self again if there are more elements.
    if (++i != strVec.end()) {
        isPalindrome(strVec, i);
    }
}

int main()
{
    vector<string> userInputs;
    string tmpStr;

    //Collects user inputs into a vector of strings
    for (int i = 1; i <= 10; i++) {
        cout << "Enter test string " << i << " of 10: ";
        cin >> tmpStr;
        userInputs.push_back(tmpStr);
    }

    //Passes in vector object by reference and iterator pointed to first element.
    isPalindrome(userInputs, userInputs.begin());
}