I have two structs and would like the TEXT in the first struct to show the value of a STRING in the second struct.

Code:

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typedef struct {
	TEXT* txtPlayerName;
} MPLAYDEBUGTEXT;

typedef struct {
	STRING* strPlayerName;
	var varPlayerID;
	var varLoaded;
} MPLAYEROBJ;
  

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I would like the TEXT in the MPLAYDEBUGTEXT struct to show the value of the STRING in the MPLAYEROBJ struct.

I can do that with something like this

Code:

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(mplayerdebugtext.txtPlayerName.pstring)[0] = mplayerobj.strPlayerName

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But then if I change mplayerobj.strPlayerName the change is not reflected in the text object. I've tried all kinds of *'s and &s but no luck so far.

When you change mplayerobj.strPlayerName, do you update mplayerdebugtext as well?

use Str_cpy

use Str_cpy(mplayerdebugtext.txtPlayerName.pstring)[0] , layerobj.strPlayerName);

Excessus is spot on, I don't want to have to update mplayerdebugtext every time mplayerobj.strPlayerName is changed.

The TEXT is visible. If I do the following
Code:

---

mplayerobj.strPlayerName = "TEST";
(mplayerdebugtext.txtPlayerName.pstring)[0] = mplayerobj.strPlayerName;

mplayerobj.strPlayerName = "PLAYER NAME";
Code:


The word TEST is displayed on the screen. If I was not using structs and just a 'traditional' STRING and TEXT combination I would not have to update the TEXT when the STRING changed.

Hope this helps anyone looking.

Yes, I see the problem.

Let's look at it line by line.

mplayerobj.strPlayerName = "TEST";
mplayerobj.strPlayerName is a STRING pointer. By writing "TEST", you are putting 5 chars somewhere in memory (T, E, S, T, 0). The assignment (=) makes your STRING* (mplayerobj.strPlayerName) point to that memory location. All good so far.

(mplayerdebugtext.txtPlayerName.pstring)[0] = mplayerobj.strPlayerName;
This line copies the memory address from mplayerobj.strPlayerName to
(mplayerdebugtext.txtPlayerName.pstring)[0]. Now both pointers point to the memory address where "TEST" is stored. Still good.

mplayerobj.strPlayerName = "PLAYER NAME";
This is the problem. "PLAYER NAME" is not stored at the same location as "TEST". Now you have mplayerobj.strPlayerName pointing to the memory address where "PLAYER NAME" is stored, and (mplayerdebugtext.txtPlayerName.pstring)[0] still pointing to the memory address where "TEST" is stored.

What you want to do, is not change the memory address strPlayerName points to, but change what is at that address. You can do this with str_cpy. Here is how I'd write this:

Code:

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mplayerobj.strPlayerName = str_create("TEST"); // I do this so it is actually a STRING, and not a char[].
(mplayerdebugtext.txtPlayerName.pstring)[0] = mplayerobj.strPlayerName;

str_cpy(mplayerobj.strPlayerName, "PLAYER NAME");

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A nice clip about pointers in C:
http://www.youtube.com/watch?v=6pmWojisM_E

Yea! Works now. Thanks all for your help. Excessus, you (and Binky) explained it really well.