Guessing game

#include <iostream>
#include <cctype>
#include <time.h>
#include <conio.h>


using namespace std;

int main(){

    int z;
    int x;

    char option;
    char rematch;
    /*char letters[29] = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'l', 'k', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'x', 'z', 'æ', 'ø', 'å', 'y', 'w' };*/

    bool replay;

    do{


        srand(time(NULL));
        z = (rand() % 365241 ^ 215);

        system("cls");

    cout << "Choose difficulity" << endl;
    cout << "(H) Hard 1-5000" << endl;
    cout << "(M) Medium 1-500" << endl;
    cout << "(E) Easy 1-50" << endl;

    cin >> option;

        /*for (int i = 1; i < 29; i++){
            if (letters[i] == x){
                cout << "You dumb trash-tier shitnigger, this was intended for fucking integers" << endl;*/
            /*}*/


    if ((option == 'H') || (option == 'h'))  {

            srand(z);
            x = 1 + (rand() % 5000);

    }

    else if ((option == 'M') || (option == 'm')) {

        srand(z);
        x = 1 + (rand() % 500);

    }

    else if ((option == 'E') || (option == 'e')) {

        srand(z);
        x = 1 + (rand() % 50);

    }


    cout << x << endl;

    int number;
    cout << "Type in you number: ";
    cin >> number;

    // loop

    bool done = false;

    do

    {

        // Comparison operators: == != > < >= <=

        if (!(cin >> x))
        {
            cin.clear();
            cin.ignore(numeric_limits<streamsize>::max(), '\n');
            cout << endl << "Input must be an integer" << endl << endl;
            cout << "Type in you number: ";
        }

        else if (number <= x) {
            cout << "\nThat number is too low, try again" << endl;
            cout << "Type in your next guess: ";
            cin >> number;
        }

        else if (number >= x) {
            cout << "\nThat number is too high, try again" << endl;
            cout << "Type in your next guess: ";
            cin >> number;
        }

        if (number == x) {
            cout << "\nYou're right" << endl;
            cout << "Do you want to play again?" << endl;
            cout << " Press Y for yes or N for no" << endl;

            cin >> rematch;

            if ((rematch == 'Y') || (rematch == 'y')) {

                replay = true;
                done = false;
                break;

            }

            else if ((rematch == 'N') || (rematch == 'n')){


                exit(0);
            }

        }

        /*if (done == true) {

        }*/

    } while (done == false);
    } while ((rematch == 'Y') || (rematch == 'y')); {
        return 0;
    }


    }