Could I get some help with this?

[proctorwho]

Apparently this doesn't go in the Beginners forum, which is weird, because I've only been doing this for a few weeks, but ok.

Alright, so as far as I can tell I have written everything right in this, but every time I try to run, it initializes, gets through two lines of, then tells me there is a fatal error involving my strings and my professor basically told me I was on my own to solve it, but I'm clueless. Any thoughts?

#include <iostream>
#include <string>
#include "SubstCipher.h"
using namespace std;



	SubstCipher::SubstCipher(string newCipher)
	{
		newCipher = cipherKeys;
	}

	int SubstCipher::charToAlphabetPosition(char c)
	{
		return static_cast<int>(c) - static_cast<int>('a');
	}

	char SubstCipher::alphabetPositionToChar(int pos)
	{
		return static_cast<char>(pos + static_cast<int>('a'));
	}

	string SubstCipher::getCipherKeys()
	{
		return cipherKeys;
	}

	void SubstCipher::setCipherKeys(string newKey)
	{
		cipherKeys = newKey;
	}

	char SubstCipher::encodeChar(char newChar)
	{
		return cipherKeys[charToAlphabetPosition(newChar)];
	}

	char SubstCipher::decodeChar(char oldChar)
	{
		return alphabetPositionToChar(cipherKeys.find(oldChar));
	}

	string SubstCipher::encodeString(string newString)
	{
		string codeString = "";
		for(int i=0; i < newString.length(); i++)
		{
			char letter;
			letter = newString[i];
			letter = encodeChar(letter);
			codeString = codeString + letter;
		}	
		return codeString;
	}

	string SubstCipher::decodeString(string oldString)
	{
		string decodeString = "";
		for(int i=0; i < oldString.length(); i++)
		{
			char code;
			code = oldString[i];
			code = decodeChar(code);
			decodeString = decodeString + code;
		}
		return decodeString;
	}

[long double main]

I just replied to your other thread.
(For the record, I think it's possible to move a thread to a different forum...it should be one of the drop-down options or something.)