Comparing pointers won't work!

[BorlandDave]

I am comparing two pointers. When debugging they both contain the same address (both 00E2A7DC), but my comparison doesn't return true. Why not?

Graphics::TBitmap* Image1;
Image1 = new Graphics::TBitmap;

//point 'image1' to first image in 'ImageList1'
ImageList1->GetBitmap(0, Image1);

//add an item to my list box with Image1 as an object
ListBox1->Items->AddObject("test1",Image1);

//perform comparison between the two pointers
if(ListBox1->Items->Objects[0] == Image1){
    //never gets here!
}

 

[tsh73]

as an idea - may be you can try to cast pointers to void* before comparison?

 

[BorlandDave]

Thanks for the suggestion, but that didn't work either. I've simplified the code and it still doesn't work. Is this even possible?

int integer = 1;
int *integerPtr1 = &integer;
int *integerPtr2 = &integer;

if(integerPtr1 == integerPtr2){
    //never gets here either!
}

And it can't get much simpler than that!

 

[Totte]

Why not cast them to long? Then you just compares two long and that should work.

Furthermore i would print out the values to do a manual check and see what the problem is.

Totte
Keep making it perfect and it will end up broken.

 

[TonyGroves]

It works for me; can't see why it wouldn't work for you.

 

[BorlandDave]

Right, I've no idea what's going on, but I re-typed what I had in my original post virtually word for word and it's decided to work now.

3 hours of programming and I'm none the wiser.

 

[Totte]

I don't mind that faults appear, I'm getting pissed on the faults that it's just *poof* works! I mean, You don't learn anything from it!

Totte
Keep making it perfect and it will end up broken.

 

[2ffat]

I learned long ago not to argue with success. Just be glad it does. ;-)

It might be possible that a control character that won't display was somehow put into the code. When you started over, that character may have been deleted.


James P. Cottingham
-----------------------------------------
[sup]I'm number 1,229!
I'm number 1,229![/sup]

 

[BorlandDave]

The thing is when I was single stepping through the code I could see the two values showing up in my watch list as being the same, but it kept returning the comarison as false!

I hate computers sometimes!