First C++ program -- 5 question quiz

/* HEADERS */

#include <iostream>
#include <conio.h>
#include <windows.h>
#include <cmath>
#include <string>

using namespace std;

int main()
{
    system("COLOR 07");

    char personsName[80];
    cout << "Before we begin, what is your name? " << endl;
    cin >> personsName;
    system("CLS");



    Sleep(30);
    cout << "                                H";
    Sleep(30);
    cout << "e";
    Sleep(30);
    cout << "l";
    Sleep(30);
    cout << "l";
    Sleep(30);
    cout << "o";
    Sleep(30);
    cout << ",";
    Sleep(30);
    cout << " ";
    Sleep(30);
    cout << personsName;
    Sleep(30);
    cout << ".";
    Sleep(700);
    cout << endl;
    Sleep(30);
    cout << "                                I";
    Sleep(30);
    cout << "'";
    Sleep(30);
    cout << "m ";
    Sleep(30);
    cout << "a ";
    Sleep(30);
    cout << "c";
    Sleep(30);
    cout << "o";
    Sleep(30);
    cout << "m";
    Sleep(30);
    cout << "p";
    Sleep(30);
    cout << "u";
    Sleep(30);
    cout << "t";
    Sleep(30);
    cout << "e";
    Sleep(30);
    cout << "r";
    Sleep(30);
    cout << ".";
    Sleep(3500);



    system("CLS");
    system("COLOR 06");


    cout << endl << endl << endl << endl << endl;
    Sleep(100);
    cout << "     I ";
    Sleep(100);
    cout << "will ";
    Sleep(100);
    cout << "count ";
    Sleep(100);
    cout << "down ";
    Sleep(100);
    cout << "from ";
    Sleep(100);
    cout << "5, ";
    Sleep(100);
    cout << "and ";
    Sleep(100);
    cout << "when ";
    Sleep(100);
    cout << "I ";
    Sleep(100);
    cout << "get ";
    Sleep(100);
    cout << "to ";
    Sleep(100);
    cout << "0, ";
    Sleep(100);
    cout << "the ";
    Sleep(100);
    cout << "quiz ";
    Sleep(100);
    cout << "will ";
    Sleep(100);
    cout << "begin. ";
    cout << endl << endl;
    Sleep(100);
    cout << "You ";
    Sleep(100);
    cout << "will ";
    Sleep(100);
    cout << "be ";
    Sleep(100);
    cout << "asked ";
    Sleep(100);
    cout << "five ";
    Sleep(100);
    cout << "questions. ";
    Sleep(100);
    cout << "Answer ";
    Sleep(100);
    cout << "them ";
    Sleep(100);
    cout << "correctly ";
    Sleep(100);
    cout << "or ";
    Sleep(100);
    cout << "you ";
    Sleep(100);
    cout << "must ";
    Sleep(100);
    cout << "repeat ";
    Sleep(100);
    cout << "the ";
    cout << endl << endl;
    Sleep(100);
    cout << "                            question. ";
    Sleep(100);
    cout << "GOOD ";
    Sleep(100);
    cout << "LUCK ";
    Sleep(100);
    cout << "!";
    Sleep(5000);

    system("CLS");

    char y;
    char n;
    char z;
    int a;
    int b;
    int c;
    int d;
    int e;


system("COLOR 80");
    cout << endl << endl << endl << endl << endl;
    cout <<"                     *                                     *"<< endl;
    cout << "                      You will have endless time to answer." << endl;
    cout <<"                     *                                     *"<< endl;
    cout << "                      Are you ready? Enter y for yes, n no." << endl;
    cout << "                                        ";

do
{
        cin >> z;
    if ( z == 'y' )
    {
        system("CLS");


    /* COUNTDOWN */


    cout << endl << endl << endl << endl << endl << endl << endl << endl << endl;;
    cout << "                                      FIVE";
    Sleep(1000);
    system("CLS");
    cout << endl << endl << endl << endl << endl << endl << endl << endl << endl;
    cout << "                                      FOUR";
    Sleep(1000);
    system("CLS");
    cout << endl << endl << endl << endl << endl << endl << endl << endl << endl;
    cout << "                                      THREE";
    Sleep(1000);
    system("CLS");
    cout << endl << endl << endl << endl << endl << endl << endl << endl << endl;
    cout << "                                      TWO";
    Sleep(1000);
    system("CLS");
    cout << endl << endl << endl << endl << endl << endl << endl << endl << endl;
    cout << "                                      ONE";
    Sleep(1000);
    system("CLS");
    cout << endl << endl << endl << endl << endl << endl << endl << endl << endl;
    cout << "                                      ...";
    Sleep(1000);
    system("CLS");



    /* THE QUESTIONS */


    cout << "QUESTION 1: How many fingers do you have?" << endl;
    do{

    cin >> a;

    if (a == 10)
    {
        cout << "Correct, on to question 2." << endl;
        Sleep(2000);
        system("CLS");
    }

    else
    {
        cout << "Silly, you're a human not an alien! Think again." << endl;
    }

    } while (a != 10);


    /* ******************************************************** */

    cout << "QUESTION 2: What is the sum of 17 and 33?" << endl;

    do{

    cin >> b;

    if (b == 50)
    {
        cout << "Correct, on to question 3." << endl;
        Sleep(2000);
        system("CLS");
    }

    else
    {
        cout << "Back to 1st grade.. guess again." << endl;
    }

    } while (b != 50);

    /* ******************************************************** */

    cout << "QUESTION 3: If x = 7, and y = -3, what is x + y?" << endl;

    do{

    cin >> c;

    if (c == 4)
    {
        cout << "Correct, on to question 4." << endl;
        Sleep(2000);
        system("CLS");
    }

    else
    {
        cout << "Really.. thats so simple.. go again." << endl;
    }

    } while (c != 4);

    /* ******************************************************** */

    cout << "QUESTION 4: How many planets are in our Solar System?" << endl;

    do{

    cin >> d;

    if (d == 9)
    {
        cout << "Correct, on to question 5." << endl;
        Sleep(2000);
        system("CLS");
    }

    else
    {
        cout << "Tsk tsk tsk! Study harder.. try again." << endl;
    }

    } while (d != 9);

    /* ******************************************************** */

    cout << "QUESTION 2: How old are you?" << endl;

    do{
    cin >> e;
    e = e;


    if (e > 25)

        cout << "You're not THAT old.. " << endl;

    else if (e < 12)

        cout << "You're wayyy older than that! " << endl;

    else
        {
            cout << "You ARE " << e << " years old!" << endl;
        Sleep(2000);
        system("CLS");

            /* ENDING */

    cout << "                  ------------------------------------------------     " << endl
         << "                /                                               /      " << endl
         << "               | This was my first ever program made using C++ |       " << endl
         << "               | programming language! I hopy you enjoyed it   |       " << endl
         << "               | as much as I enjoyed making it! I have aspir- |       " << endl
         << "               | ations to major in Computer Science after I   |       " << endl
         << "               | graduate from High School and go off to Univ- |       " << endl
         << "               | ersity. Programming is very intriguing... Be  |       " << endl
         << "               | prepared to see many more videos in the future|       " << endl
         << "               | with bigger more complex programs aswell. This|       " << endl
         << "               | was my first, so dont hate. cout << 'THE END';|       " << endl
         << "              /                                               /        " << endl
         << "             ------------------------------------------------          " << endl;

        }



    } while (e != 13 || e != 14 || e != 15 || e != 16 || e != 17 || e != 18 || e != 19 || e != 20 || e != 21 || e != 22 || e != 23 || e != 24 || e != 25);


    }

    else if ( z == 'n' )
    {
        system("CLS");
        cout << "Thats okay, I'll wait. Type in y when you're ready!" << endl;


    }
    else
    {
        system("CLS");
        cout << "I said enter y or n, silly!" << endl;


    }
} while ( z != 'y' || z != 'n' );


return 0;
}