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void display()const;

This function displays menu items horizontally or vertically.For vertical menu,

the menu items will be framed.

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int edit(void);

This function allows users to navigate through menu items by pressing page down

& up keys for vertical menu and right & left keys for horizontal menu. By

menu item would be displayed then deselected.Other keys just terminates the

function and returns the key.

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int selectedIndex(void);