DOC: Documentation on fmod() Is Incorrect

Last reviewed: January 8, 1997
Article ID: Q120959

The information in this article applies to:

The C Run-time (CRT), included with: Microsoft Visual C++ 32-bit Edition, version 1.0

SUMMARY

The fmod(x,y) function returns the floating point remainder of x/y, where x and y are floating point numbers. If y is 0.0, fmod should return a NAN(not a number) which it does, but the documentation on fmode says incorrectly that it should return 0.

The document has been corrected in Visual C++ 2.0.

MORE INFORMATION

Sample Code

#include <stdio.h>
#include <math.h>

void main(void)

{

 double x=10.0, y=0.0, z;

 z=fmod(x,y);
 printf("The remainder of %.2f/%.2f is %f\n", x, y, z);

}

Output

The remainder of 10.00/0.00 is -1.#IND00 // Correct output

Additional reference words: 1.00 2.00 double remainder
KBCategory: kbprg kbdocerr kbdocfix
KBSubcategory: CRTIss

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Last reviewed: January 8, 1997
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.