c - my if and while structure isnt working properly

Question

Guys ?m tring to do wrong username and password part for my login program but if the user gets one of them wrong program sends user to login but did not stop there.what is my problem here? ? think problem is the not registered part but ? cannot find a way to bypass it.and ? need to add we cannot use goto for it

void login()
{
    FILE* fp;
    char c, nama[30], pass[30]; int z = 0; 
    int cekun, cekpw;
    fp = fopen("file.txt", "r");
    for (i = 0; i <= 10; i++)
    {
        printf("

  username: ");
        scanf("%9s", nama);

        system("cls");
        printf("

 password: ");
        while ((c = _getch()) != 13)
        {
            pass[z++] = c;
            printf("%c", '*');
        }
        pass[z] = '';
        while (!feof(fp)) 
        {
            fscanf(fp, "%30s %30s", w[i].nama, w[i].pass); 
            cekun = strcmp(nama, w[i].nama);
            cekpw = strcmp(pass, w[i].pass);
            if (cekun == 0 && cekpw == 0)
            {
                system("cls");
                printf("


 succesfully entered!");
                break;
            }
            else if (cekun == 0)
            {
                printf("


 wrong password !");
                printf("

  (press [Y] for reregistiration )");
                if (_getch() == 'y' || _getch() == 'Y')
                    system("cls"); login();
            }
            else if (cekpw == 0)
            {
                printf("


YANLI? KULLANICI ADI!");
                printf("

  (press [Y] reregistiration )");
                if (_getch() == 'y' || _getch() == 'Y')
                    system("cls"); login();
            }
        }
        if (cekun != 0 && cekpw != 0) 
        {
            printf("


not registered
  press [ENTER] for registiration ");
            if (_getch() == 13)
                system("cls");
            reg();
        }
        break;
    }
    _getch();
}

Answer 1

等待大神解答