how to fill other indexes of array after breaking it ...

[dutch]

There are no standard C++ functions to clear the screen or read a character without a newline. The best you can do is to use a cross-platform library like ncurses. Alternatively you could use some conditional compilation and have multiple implementations of various functions. E.g.,

void clear_screen()
{
#ifdef _WIN32             // if it's Windows (32 or 64 bit)
    system("cls");
#else                     // else assuming linux (maybe also works with apple)
    system("clear");
#endif
}