Simple encrypt of words

cFuncs.h

// Credits to Hacker Fail for making the program and change the func
// Credits to Code64 for the func

#include <string.h>
#include <windows.h>
#include <iostream>
#include <tchar.h>
#include <fstream>
#include <string>

char* Encrypt(const char *plaintext)
{
    int len = strlen(plaintext);
    char *cyphertext = new char[len + 1];
    for(int i = 0; i < len; i++)
        cyphertext[i] = plaintext[i] + 4;

    cyphertext[len] = 0;
    return cyphertext;
}


cMain.cpp

// Credits to Hacker Fail for making the program and change the func
// Credits to Code64 for the func

#include "cFuncs.h"

using namespace std;

class Comando
{
public :

    char pa[999];

    int e;

    void Crip();
};

void Comando::Crip()
{

    ofstream out;

    out.open("Encrypted words.txt");

    out << "Words encrypted :\n";

    Comando use;

    while(true)
    {
        cout << "\nEnter the word to be encrypted :\n\n";
        cin >> use.pa;

        cout << "\n\nThe word encrypted : " << Encrypt(use.pa) << "\n\n";

        out << use.pa << " = " << Encrypt(use.pa) << "\n";

        Sleep(500);

        cout << "Do you want to use the program again?\n"
            << "1 -> Yes\n"
            << "2 -> No\n\n";
        cin >> use.e;

        if ( use.e == 1 )
        {
            cout << "\n\nThanks you for using the program again!\n\n";
        } else if ( use.e == 2 )
        {
            cout << "\n\nThanks for using the program!\n\n";
            Sleep(500);
            exit(0);
        } else if ( use.e != 1 && use.e != 2 )
        {
            cout << "\n\nEnter a valid option... The program will close...\n";
            Sleep(500);
            exit (0);
        }
    }

    out.close();
}

int main()
{
    Comando use;

    ofstream out;

    out.open("Encrypt.h");

    out << "//Func made by Code64"
        << "\n//Program made by HackerFail\n\n\n\n\n"
        << "char* Decrypt(const char *plaintext)"
         << "\n{"
         << "\n int len = strlen(plaintext);"
         << "\n char *cyphertext = new char[len + 1];"
         << "\n for(int i = 0; i < len; i++)"
         << "\n cyphertext[i] = plaintext[i] - 4;"
         << "\n cyphertext[len] = 0;"
         << "\n return cyphertext;"
         << "\n}";

    out.close();

    system ("title Encrypt made by HackerFail"); // title of the program

    system("color 72"); // color of the program

    cout << "Program started : ";
    system("TIME /t");

    cout << "\n\nDont use the space!!\n\n";

    use.Crip();

    system("pause");

    return 0;

}