Knowledge Base

FIX: Warning C4056 Generated When /Op Option is Used

Article ID: 120218

Article Last Modified on 7/5/2005

Microsoft Visual C++ 2.0 Professional Edition
Microsoft Visual C++ 4.0 Standard Edition
Microsoft Visual C++ 4.1 Subscription
Microsoft Visual C++ 4.2 Professional Edition
Microsoft Visual C++ 5.0 Standard Edition
Microsoft Visual C++ 4.0 Cross Development Edition for Macintosh

This article was previously published under Q120218

SYMPTOMS

The following warning is generated when the sample code listed in the More Information section below is compiled with the option /Op and the warning level set to 3 or higher:

warning C4056 : overflow in floating-point constant arithmetic

RESOLUTION

Ignore the warning as it is generated incorrectly. Alternatively, you can suppress the warning by using the /W2 option.

STATUS

This bug was corrected in Microsoft Visual C++, version 6.0.

MORE INFORMATION

Sample Code to Reproduce Problem

/* Compile options needed:   /Op /W3
*/ 

void main()
{
   double i;
   i = -1.0;
}

Additional query words: 9.00 10.00 10.10 10.20

Keywords: kbbug kbfix kbvc600fix KB120218