This is probably something rather simple (I mean, it certainly IS beyond basic!) but it has baffled me for the past 45 minutes so I thought I'd post a question here in hopes someone might have an answer off the top of their head...

So - here's the code:

{code}
//---------------------------------------------------------------------------
#include 
#pragma hdrstop
#include 
#include "TestMainForm.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
	: TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button3Click(TObject *Sender)
{
	long a = 3, b = 5;
	long c = max(a, b);
}

{code}

It doesn't get much simpler than that...  The code compiles fine as a 32-bit target (and, in all honesty, it compiles fine even without #include  with 32-bit compiler!).  However, trying to compile it with a 64-bit compiler generates an error: 

[bcc64 Error] TestMainForm.cpp(49): use of undeclared identifier 'max'

Can't quite figure out why, though...  Anyone?

Thanks,

Marko

Yes, I intended to mark your answer as correct...  I think I did it now...

Marko

Marko wrote:

> Yeah, that was the first thing I tried, but got:
> 
> [bcc64 Error] TestMainForm.cpp(49): no member named 'max' in namespace
> 'std'
> 
> with a 64-bit compiler (and, once again, no complaints from the 32-bit
> compiler)...

Then you did not include the proper header for it.

> Then (just now), thought I'd try:
> 
> #include 
> 
> And that seems to work for both

I did tell you to use that #include.  std::max() is an actual function, not a macro.

> with or without std::

The 'std::' is required, unless you have a 'using namespace std' or 'using std::max' statement in your code.  If it is working in 32bit without 'std::' and either 'using'' statement, then you are still calling the C macro, not the C++ function.  They are NOT the same thing!

--
Remy Lebeau (TeamB)

Hi Remy,

Yeah, that was the first thing I tried, but got:

[bcc64 Error] TestMainForm.cpp(49): no member named 'max' in namespace 'std'

with a 64-bit compiler (and, once again, no complaints from the 32-bit compiler)...

Then (just now), thought I'd try:

#include 

And that seems to work for both (with or without std::)...

Thanks,

Marko

Marko wrote:

> So - here's the code:

You are trying to use the C max() macro.  Try using the C++ std::max() function 
instead:

{code}
#include  
....
long c = std::max(a, b);
{code}

--
Remy Lebeau (TeamB)