Microsoft KB Archive/120218

Knowledge Base

FIX: Warning C4056 Generated When /Op Option is Used

Article ID: 120218

Article Last Modified on 7/5/2005

---

APPLIES TO

• 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

---

Send feedback to Microsoft

© Microsoft Corporation. All rights reserved.