Memory Game

#include <iostream>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <windows.h>

using namespace std;

int n = 25, level = 1, random = 0, guess = 0, guess_prev = 0;
int grid[26], memory[26];
bool ops = false;

void Afisare()
{
    cout << "--------------------------------------------------------------------\n";
    cout << "                             Memory Game                            \n";
    cout << "--------------------------------------------------------------------\n";
    cout << "                                Rules                               \n";
    cout << "--------------------------------------------------------------------\n";
    cout << " You can already see that there's a grid of numbers. When the level \n";
    cout << " begins some numbers will blink in a particular order which you'll  \n";
    cout << " have to reproduce.\n";
    cout << "--------------------------------------------------------------------\n";

    cout << " Level: " << level << "\n ";
    for( int i=1 ; i<=n ; i++ )
    {
        if( i == random )
            cout << (char) 178 << "  ";
        else
        {
            if( i < 10 )
                cout << i << "  ";
            else
                cout << i << " ";
        }

        if( i%5 == 0 )
            cout << "\n ";
    }
}

void GenerateNumber()
{
    srand(time(NULL));
    for( int i=1 ; i<=level ; i++ )
    {
        guess_prev = guess;
        do
        {
            random = rand()%n + 1;
        }
        while( guess != guess_prev );
    }
}

int main()
{

    while(1)
    {
        for( int i=1 ; i<=level ; i++ )
        {
            GenerateNumber();
            memory[i] = random;
            Afisare();
            Sleep(2000);
            system("cls");
        }
        random = 0;
        Afisare();
        for( int i=1 ; i<=level ; i++ )
        {
            if( i>1 )
                cout << " Enter your guess(number pls): ";
            else
                cout <<  "Enter your guess(number pls): ";
            cin >> guess;
            if( guess != memory[i] )
            {
                system("cls");
                cout << "Ops :( You lost! ";
                ops = true;
                break;
            }
            Sleep(500);
        }
        if( ops || level == 10 )
            break;
        system("cls");
        cout <<" Congrats! You have beaten level " << level;
        Sleep(1000);
        system("cls");
        level++;
    }
    Sleep(10000);
    return 0;
}