cplusplus Q

[T3l Ca7]

Does anyone know if there is a function to check whether a float/double is actually an integer in Visual C++.

In borland C++ there is something like IsInt(), but I can't find a Visual C++ equivalent.

[NaiLed]

Tech Support

[T3l Ca7]

Nailed: can you take this thread across a few more forums so it can get more readers?

[NaiLed]

you'll generally find that the people who know about this stuff and actually want to help will check this forum

[Vertigo5]

Not sure about Visual C++, but to test if "x" is an integer, you could always do:

if ((x - (int)x) == 0.0) ...

[MetalKid]

Yeah, that'll work.

[Stultus]

?go google

[T3l Ca7]

Not sure about Visual C++, but to test if "x" is an integer, you could always do:

if ((x - (int)x) == 0.0) ...

That's how I did it, but I wanted to look more professional. :fear:

[Nockm]

For now use a #define

[Wil]

?go google

Made me laugh

[MetalKid]

More professional? Then do this:

if isInt(x)
...




private Boolean isInt(double x)
{

if ((x - (int)x) == 0.0)
return true;
else
return false;
}

[Zemyla]

Or just:

private inline bool isInt(double x) {
return (x - int(x)) == 0.0;
}

The if is not required.

[suxxor]

bool isInt(float f)
{
return (float)(int)f == f;
}