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     The getch function reads a single character from the console
     without echoing. The getche function reads a single character from
     the console and echoes the character read. Neither function can be
     used to read CTRL+C.
 
     When reading a function key or cursor-movement key, the getch and
     getche functions must be called twice. The first call returns 0 or
     0xE0, and the second call returns the actual key code.
 
     Return Value
 
     These functions return the character read. There is no error
     return.
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