Hello, I am trying to do a ZeroMemory on a pointer to structure, but it fails on runtime.
Debugger shows at the ZeroMemory line (VC++6)Code:rt3DModel *pModel; ... ... ... ZeroMemory(pModel, sizeof(rt3DModel));
What might be wrong here? I dont use new here.
Thanks
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If your not using new, then how is that memory allocated?
The pModel pointer will be pointing to an invalid address.
You could do:
What does zero memory do?Code:rt3DModel pModel; // on stack ... ZeroMemory(&pModel, sizeof(rt3DModel));
ZeroMemory?In what headerfile is this function.
What's the problem?
ZeroMemory ammar is a macro of memset.
Ok guys, I created it as new and it worked. But I have a stupid question here:
lets stay i have a structure with several variables, k? And i make an instance of that class:
rt3DModel model1;
rt3DModel model2;
Will both model1 and model2 point to the same values? I mean if model1.something = 5, then will it be model2.something = 5 too (if i set model1.something=5 first)
I think not, but asking to make sure.
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Bringing the software of the future on the net.
Of course Not, because when you creat an instance you creat all the variables related to that belonges to it.
Maybe model1.something is equal to model2.something if has a value by default or if you changed it to be equal.
Is that what you mean?
No model1 & model2 are seperate entities. model1.something could equal 2, while model2.something could equal 5.
What you could do is this:
Now modelPtr points at the address of model object. In effect there is only one object (model) plus a pointer to it.Code:rt3DModel model; // Extra pointer to model rt3DModel* modelPtr = &model;
So when you set model.something = 5, when modePtr->something is read, it will be equal to 5 also.
Does this make sense?
Ohhh right, so I dont have to update the modelPtr everytime.
Thanks for making this clear
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