convert variable string into char array c++

I found so incredibly many question posts of this sort - i'm speaking of "convert string to char array" - but none of those solutions actually work for me, trying to convert cin >> text into some char array textArray[1024] which I could then convert into a list cause I think it's easier to work with. It's for some encryptor (code down below).

If there's any easier way of doing this then let me know.

#include <iostream>
#include <string>
#include <fstream>
#include <list>
#include "encryptor.h"

using namespace std;

void encrypt()
{
    string text;
    char textArray[1024];
    list<char> listText;
    list<char>::iterator it;
    int textSize;
    string code;
    bool fail = false;
    string segment;
    string fileName;

    cout << "Now enter your text. (max 1024 chars)" << endl;
    cin >> text;

    textSize = text.size();

    //string to char[]
    //none of these work
    strncpy(textArray, text.c_str(), sizeof(textArray));
    textArray[sizeof(text) - 1] = 0;

    strcpy_s(aText, text.c_str());

    for (int i = 0; i < text.length(); i++)
    {
        aText[i] = text[i];
    }

    aText[text.length()] = '\0';

    text.copy(aText, text.length()+1);



    //char[] to list
    for(int i = 0; i < textSize; i++)
    {
        char *c = new char(textArray[i]);
        listText.push_back(*c);
    }

    //Going through list
    //for every char there's a special segment added to the string
    for(it = listText.begin(); it != listText.end(); it++)
    {
        if(fail == true) break;

        switch (*it)
        {
        case 'a':
        case 'A':
            {
                segment = "XQ7";
            } break;
        {/*---*/}               //I just let everything from b - z and 0 - 9 out for this post
        case ' ':
            {
                segment = "Z 7";
            } break;
        case '.':
            {
                segment = "Z 8";
            } break;
        case ',':
            {
                segment = "Z 4";
            } break;
        default:
            {
                cout << "There's a special char this program doesn't understand. It is "
                cout << *it << endl;
                cout << "Do it again" << endl;
                fail = true;
            } break;
        }

        code = code + segment;
    }

    do
    {
        cout << "\n\nname of the file: ";
        cin >> fileName;

        if(fileName != "")
        {
            ofstream write;
            write.open(fileName + ".txt");
            write << code;
            write.close();
        } else {
            cout << "Name shouldn't be empty!" << endl;
        }
    } while(fileName == "");
}