c++タイピングゲーム

#include 
#include 
#include 
#include 
#include 
using namespace std;
//       、    、    
char RandomChar()
{
    int type = rand() % 3;
    if (type == 0)
    {
        return rand() % 10 + '0';
    }
    if (type == 1)
    {
        return rand() % 26 + 'A';
    }
    return rand() % 26 + 'a';
}
//         (x,y) 。
void gotoxy(int x, int y)
{
    CONSOLE_SCREEN_BUFFER_INFO cs;
    HANDLE hConsoleOut = GetStdHandle(STD_OUTPUT_HANDLE);
    GetConsoleScreenBufferInfo(hConsoleOut, &cs);
    cs.dwCursorPosition.X = y;
    cs.dwCursorPosition.Y = x;
    SetConsoleCursorPosition(hConsoleOut,
        cs.dwCursorPosition);
}

int main()
{

    HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);//        ，          

    cout << "    ：
";
    cout << "         ，      ，        ，              

";
    cout << "       

";
    getch();
    cout << "         
";
    getch();
    system("cls");//          
    bool again = 1;//        
    while (again)
    {
        srand((unsigned int)time(NULL));//      

        int x[100];//  x   
        int y[100];//  y   
        char target[100];//      
        int  score = 0;//    
        cout << "           :
";
        cout << "1：" << "  " << endl;
        cout << "2：" << "  " << endl;
        cout << "3：" << "  " << endl;
        cout << "4：" << "  " << endl;
        cout << "5：" << "  " << endl;
        cout << endl;
        int n;
        cin >> n;
        system("cls");//          
        gotoxy(0, 55);//      
        cout << "    ：" << score;

        SetConsoleTextAttribute(hOut,
            FOREGROUND_RED |
            FOREGROUND_INTENSITY);  //  
        gotoxy(20 - 2 * n, 0);//           
        cout << "------- --------------- ------------------ -------" << endl;

        SetConsoleTextAttribute(hOut,
            FOREGROUND_GREEN |
            FOREGROUND_INTENSITY);  //  
        for (int i = 1; i <= 2 * n; i++)
        {
            x[i] = 0;
            y[i] = rand() % 50;
        }
        for (int i = 1; i <= 2 * n; i++)
        {
            target[i] = RandomChar();
        }
        bool gameOver = 0;//        
        while (gameOver == 0)
        {
            while (!kbhit()) //          
            {
                for (int i = 1; i <= 2 * n; i++)
                {
                    gotoxy(x[i], y[i]);
                    cout << target[i];
                    x[i]++;
                    if (x[i] == 20 - 2 * n) //      
                    {
                        gameOver = 1;
                    }
                }
                Sleep(1000 - n * 100);//           
                for (int i = 1; i <= 2 * n; i++)
                {
                    gotoxy(x[i] - 1, y[i]);
                    cout << ' ';//        

                }
                if (gameOver)
                {
                    break;
                }
            }
            if (gameOver)//        ，            ，        ，       
            {
                break;
            }
            char userHit = getch();
            for (int i = 1; i <= 2 * n; i++)
            {
                if (target[i] == userHit)//         
                {
                    score++;
                    gotoxy(0, 65);
                    cout << score;
                    gotoxy(x[i], y[i]);
                    cout << ' ';//    

                    //       
                    x[i] = 0;
                    y[i] = rand() % 50;
                    target[i] = RandomChar();
                }
            }
        }

        SetConsoleTextAttribute(hOut,
            FOREGROUND_RED |
            FOREGROUND_GREEN |
            FOREGROUND_BLUE |
            FOREGROUND_INTENSITY); //  
        gotoxy(20 - 2 * n + 2, 0);
        cout << "   ，    ！
      :";

        SetConsoleTextAttribute(hOut,
            FOREGROUND_GREEN |
            FOREGROUND_INTENSITY);  //  
        cout << score;

        SetConsoleTextAttribute(hOut,
            FOREGROUND_RED |
            FOREGROUND_GREEN |
            FOREGROUND_BLUE |
            FOREGROUND_INTENSITY); //  
        cout << " 

       ？ Y/N
";
        string str;
        cin >> str;
        if (str == "N" || str == "n")
        {
            cout << "    ，      
";
            break;
        }
        else
        {
            system("cls");//          
        }
    }
    return 0;
}