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The "warning" pragma sets the level of warning messages.  The form of the
"warning" pragma is as follows.

+--------------------------------------------------------------------------+
|      #pragma warning msg_num level [;]                                   |
|                                                                          |
+--------------------------------------------------------------------------+

where
    description

msg_num
    is the number of the warning message.  This number corresponds to the
    number issued by the compiler.  If msg_num is "*", the level of all
    warning messages is changed to the specified level.  Make sure to strip
    all leading zeroes from the message number (to avoid interpretation as
    an octal constant).

level
    is a number from 0 to 9 and represents the level of the warning message.
     When a value of zero is specified, the warning becomes an error.