To get a trial key
fill out the form below
Team License (a basic version)
Enterprise License (an extended version)
* By clicking this button you agree to our Privacy Policy statement

Request our prices
New License
License Renewal
--Select currency--
USD
EUR
GBP
RUB
* By clicking this button you agree to our Privacy Policy statement

Free PVS-Studio license for Microsoft MVP specialists
* By clicking this button you agree to our Privacy Policy statement

To get the licence for your open-source project, please fill out this form
* By clicking this button you agree to our Privacy Policy statement

I am interested to try it on the platforms:
* By clicking this button you agree to our Privacy Policy statement

Message submitted.

Your message has been sent. We will email you at


If you haven't received our response, please do the following:
check your Spam/Junk folder and click the "Not Spam" button for our message.
This way, you won't miss messages from our team in the future.

>
>
>
V3040. The expression contains a suspic…
Analyzer diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
MISRA errors
AUTOSAR errors
OWASP errors (C#)
Additional information
Contents

V3040. The expression contains a suspicious mix of integer and real types.

Dec 17 2015

The analyzer detected a possible error in an expression where integer and real data types are used together. Real data types include types 'float' and 'double'.

Consider the following example taken from a real application:

public long ElapsedMilliseconds { get; }
....
var minutes = watch.ElapsedMilliseconds / 1000 / 60;
Assert.IsTrue(minutes >= 0.95 && minutes <= 1.05);

The 'minutes' variable is of type 'long', and comparing it with values 0.95 and 1.05 does not make sense. The only integer value that fits into this range is 1.

The programmer probably expected the result of integer division operation to be a value of type 'double', but it is not so. In the example above, integer division produces an integer value, which is assigned to the 'minutes' variable.

This code can be fixed by explicitly casting the number of milliseconds to type 'double', before the division operation:

var minutes = (double)watch.ElapsedMilliseconds / 1000 / 60;
Assert.IsTrue(minutes >= 0.95 && minutes <= 1.05);

The quotient will now be more accurate, and the 'minutes' variable will be of type 'double'.

This diagnostic is classified as:

You can look at examples of errors detected by the V3040 diagnostic.

This website uses cookies and other technology to provide you a more personalized experience. By continuing the view of our web-pages you accept the terms of using these files. If you don't want your personal data to be processed, please, leave this site.
Learn More →
Accept