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 toascii()               Convert 'c' to ASCII Character (Macro)

 #include   <ctype.h>

 int        toascii(c);
 int        c;                           Character to be converted

    toascii() is a macro that converts the integer 'c' to a value in the
    ASCII character set (0 - 127) by clearing all but the lower seven
    bits.  'c' is left unchanged if it already represents an ASCII
    character.

    Returns:    The converted character 'c'; no error return.

 Portability:   Not supported by ANSI standard.