  Pour obtenir une clé
d'essai remplissez le formulaire ci-dessous
Team licenсe
Enterprise licence
** En cliquant sur ce bouton, vous acceptez notre politique de confidentialité. Demandez des tariffs
Nouvelle licence
Renouvellement de licence
--Sélectionnez la devise--
USD
EUR
RUB
* En cliquant sur ce bouton, vous acceptez notre politique de confidentialité Free PVS-Studio license for Microsoft MVP specialists
** En cliquant sur ce bouton, vous acceptez notre politique de confidentialité. To get the licence for your open-source project, please fill out this form
** En cliquant sur ce bouton, vous acceptez notre politique de confidentialité. I am interested to try it on the platforms:
 Windows Linux macOS PVS-Studio for .NET Core JetBrains Rider
** En cliquant sur ce bouton, vous acceptez notre politique de confidentialité.  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.

>
>
>
Examples of errors detected by the V550…

# Examples of errors detected by the V550 diagnostic

V550. Suspicious precise comparison. Consider using a comparison with defined precision: fabs(A - B) < Epsilon or fabs(A - B) > Epsilon.

## CAMEL

V550 An odd precise comparison: x == 0. It's probably better to use a comparison with defined precision: fabs(A - B) '<' Epsilon. clock_dll sunalgo.cpp 155

``````
void projillum(short* wtab, int xdots, int ydots, double dec)
{
....
s = sin(-dtr(dec));
x = -s * sin(th);
y = cos(th);
....
lon = (y == 0 && x == 0) ? 0.0 : rtd(atan2(y, x));
}
``````

It's strange to expect 'x' and 'y' to exactly equal 0 after all these calculations.

Similar errors can be found in some other places:

• V550 An odd precise comparison: y == 0. It's probably better to use a comparison with defined precision: fabs(A - B) '<' Epsilon. clock_dll sunalgo.cpp 155

## ffdshow

V550 An odd precise comparison: x == 0. It's probably better to use a comparison with defined precision: fabs(A - B) < Epsilon. resample2.cpp 166

``````
static void av_build_filter(....)
{
....
x = M_PI * ((double)(i - center) -
(double)ph / phase_count) * factor;
if (x == 0) y = 1.0;
else        y = sin(x) / x;
....
}
``````

It's strange to expect 'x' to exactly equal 0 after all these calculations.

## Windows Calculator

V550 An odd precise comparison: ratio == threshold. It's probably better to use a comparison with defined precision: fabs(A - B) < Epsilon. Calculator AspectRatioTrigger.cpp 80

``````
void AspectRatioTrigger::UpdateIsActive(Size sourceSize)
{
double numerator, denominator;
....
bool isActive = false;
if (denominator > 0)
{
double ratio = numerator / denominator;
double threshold = abs(Threshold);

isActive = ((ratio > threshold) || (ActiveIfEqual && (ratio == threshold)));
}

SetActive(isActive);
}
``````

Similar errors can be found in some other places:

• V550 An odd precise comparison. It's probably better to use a comparison with defined precision: fabs(A - B) < Epsilon. CalcManager UnitConverter.cpp 752
• V550 An odd precise comparison: stod(roundedString) != 0.0. It's probably better to use a comparison with defined precision: fabs(A - B) > Epsilon. CalcManager UnitConverter.cpp 778
• V550 An odd precise comparison. It's probably better to use a comparison with defined precision: fabs(A - B) < Epsilon. CalcManager UnitConverter.cpp 790
• And 9 additional diagnostic messages.

## ArduPod

V550 An odd precise comparison: value != - 1. It's probably better to use a comparison with defined precision: fabs(A - B) > Epsilon. AP_Utils.cpp 574

``````
float AP_Utils::sr04_average(uint8_t trig, uint8_t echo,
int unit, int samples, int time) {
....
float average, pause, value;
....
for(int i=0; i<samples; i++) {
value = sr04(trig, echo, unit);
if(value != -1) { // <=
total += value;
delay(pause);
} else {
i--;
}
}
average = total/samples;
....
return average;
}
`````` Nous utilisons des cookies pour améliorer votre expérience de navigation. En savoir plus