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Dark GDK / Simple C++ Error Im sure

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Swampert
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Posted: 27th Jan 2009 03:46
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srry im a little dizzy today so i think im losing it lol.

im trying to combine a dbText string (third param) with an integer so it will display the camera location

"The Current Camera Location is " + camx + camy + camz (type thing)

I know im using + like addition so its not working correctly. Thanks for the help mates

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Lilith
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Posted: 27th Jan 2009 04:01
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The parameter says that it takes a pointer to a character or character string.



Or something like that. Just don't reuse the buffer in the same operation.

Lilith, Night Butterfly
I'm not a programmer but I play one in the office
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Plystire
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Posted: 27th Jan 2009 04:02
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String concatenation isn't an easy thing to do in C++ like it is in BASIC.

I've also tried to do this and what I ended up doing was create a temporary character pointer array, concatenating the necessary information onto it and then passing that into the dbText function. Not fun... so since it was just for debugging, I didn't spend a lot of time on it and just went with having the values on individual lines.


The one and only,


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Zuka
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Posted: 27th Jan 2009 05:06 Edited at: 30th Jan 2009 00:33
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#include <string>

std::string tmp = "Camera: ";
tmp += camx; tmp += ", "; tmp += camy; tmp += ", "; tmp += camz;
dbText(x, y, (char *)tmp.c_str());

If you get problems, remove the (char *) in the call to dbText.
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Swampert
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Posted: 28th Jan 2009 03:52
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alright i see thx mate

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Orac
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Posted: 28th Jan 2009 09:41
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This is how I usually do it ..



Use %d for integers or %f for floats.

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Swampert
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Posted: 28th Jan 2009 23:38
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i got 3 linker errors from main.obj like


what do i do?

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Orac
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Posted: 29th Jan 2009 10:15
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Hmm. I don't think those errors are coming from the code I posted, if you are using it exactly as shown. Using sprintf() in this way is pretty standard 'C' coding. Are you sure the buffer you are allocating is big enough to hold the entire string? Are you using the correct variable types to match up with the format specifiers (%d for integers, %f for floating point etc.)

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Swampert
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Posted: 30th Jan 2009 00:10
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I'll try using float but i still get the same errors. the sprintf() is fine but i'm using C++

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puppyofkosh
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Posted: 30th Jan 2009 01:20
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I use this

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ionstream
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Posted: 30th Jan 2009 06:02
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If you're familiar with cout then you may find that stringstreams are a bit easier to use:



Streams are fun!

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Swampert
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Posted: 30th Jan 2009 12:02 Edited at: 31st Jan 2009 05:41
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I like that answer lol. Much more basic with just << operators xD

EDIT:: Got it working with Orac's pBuf. Thanks for your help mates

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