C标准库源代码

				/***
				*labs.c - find absolute value of a long integer
				*
				*       Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
				*
				*Purpose:
				*       defines labs() - find absolute value of a long integer.
				*
				*******************************************************************************/
				
				#include 
				#include 
				
				#ifdef _MSC_VER
				#pragma function(labs)
				#endif  /* _MSC_VER */
				
				/***
				*long labs(lnumber) - find absolute value of long.
				*
				*Purpose:
				*       Find the absolute value of a long integer (lnumber if lnumber >= 0),
				*       -lnumber if lnumber < 0).
				*
				*Entry:
				*       long lnumber - number to find absolute value of
				*
				*Exit:
				*       returns the absolute value of lnumber
				*
				*Exceptions:
				*
				*******************************************************************************/
				
				long __cdecl labs (
				        long lnumber
				        )
				{
				        return( lnumber>=0L ? lnumber : -lnumber );
				}