CArray

[Warrioruw]

Hi all,

I have a CArray of struct, and I want to assign or add a new element of struct type to the CArray, but got error message, something like "No = operator" or "No constructor for struct".

Here is the sample code:

struct Sample{
CUIntArray Index;
CRect Rct;
CDblPoint Point; //user defined data type
};

Sample abc;
CArray<Sample, Sample> def;
def.Add(abc); // or def[0]=abc;


Thanks.

 

[PerFnurt]

>"No = operator"

Ie your struct should have an assignment operator

>"No constructor for struct".

Your struct should also have a copy constructor.


/Per
[sub]
&quot;It was a work of art, flawless, sublime. A triumph equaled only by its monumental failure.&quot;[/sub]

 

[Warrioruw]

Is it possible to add copy constructor or assignment operator to struct? As far as I know, it can be done in class. If it is possible, could you tell me how to do that?

Thanks

 

[Warrioruw]

Another question is that when I try to use member function of CArray<Sample, Sample> def, the list of functions didn't not show up. I had #include <afxtempl.h>.


Thanks

 

[obislavu]

Example of struct with constructor

struct MyStruct
{
	double d;
	char c;
	MyStruct(){};

	MyStruct( MyStruct & r)
	{
		d=r.d;
		c=r.c;
	}

	MyStruct & operator=(MyStruct & r)
	{
		this->d=r.d;
		this->c =r.c;
		return *this;
	}

};

As I can see, I suggest you to implement SAMPLE as a class derived from CObject and if you want to use array then use CPtrArray to store pointers to the SAMPLE objects.
-obislavu-

 

[Giordano]

If you try to use the CArray::IsEmpty method, you cannot do it if you use VC6, this method is available only from VC7
there are additional methods documented in msdn that are available from VC7 and later