Q45093: QC Advisor Says That fabs() Prototyped in STDLIB.H

Article: Q45093
Product(s): See article
Version(s): 2.00
Operating System(s): MS-DOS
Keyword(s): ENDUSER | docerr | mspl13_c
Last Modified: 19-SEP-1989

The QuickC Version 2.00 on-line help screen for the fabs() function
incorrectly states that this function is prototyped in STDLIB.H. This
is a documentation error. The fabs() function is actually prototyped
in MATH.H. The abs() and labs() functions are prototyped in STDLIB.H.

Attempts to use the fabs() function when MATH.H has not been included
will produce inaccurate results at run time. At warning levels 2 and
3, the compiler produces messages indicating that fabs() has not been
prototyped and returns an integer by default; however, at warning
levels 0 and 1 there is no indication that this problem exists.

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