Attribute of a struct receiving multiple structs

Question

It is possible an attribute of a struct receive several structs?

For example, I need the attribute LPWFSPINFDK lppFDKs; that is part of the struct _wfs_pin_func_key_detail, receive multiple structs _wfs_pin_fdk.

I am trying this way, compiles, but the final program does not recognize:

    WFSPINFUNCKEYDETAIL PinFunKeyDetail;

    WFSPINFDK ObjPinKey;
    LPWFSPINFDK PinKey;
    PinKey = &ObjPinKey;

    PinKey->ulFDK = WFS_PIN_FK_FDK01;
    PinKey->usXPosition = 5;
    PinKey->usYPosition = 5;

    PinFunKeyDetail.lppFDKs = &PinKey;

STRUCT: _wfs_pin_fdk

typedef struct _wfs_pin_fdk
{
    ULONG               ulFDK;
    USHORT              usXPosition;
    USHORT              usYPosition;
} WFSPINFDK, * LPWFSPINFDK;

STRUCT: _wfs_pin_func_key_detail

typedef struct _wfs_pin_func_key_detail
{
    ULONG               ulFuncMask;
    USHORT              usNumberFDKs;
    LPWFSPINFDK       * lppFDKs; //Aqui recebo as structs
} WFSPINFUNCKEYDETAIL, * LPWFSPINFUNCKEYDETAIL;

Answer 1

Respondent: It is possible an attribute of a struct receive several structs. The attribute you refer to, however, is only a pointer, not a container. Pointers cannot receive several structs, only addresses of these.

Something that can receive several structs would be a std::vector<_wfs_pin_fdk>.

---

By the posted passages, LPWFSPINFDK is a type defined as pointer to _wfs_pin_fdk.

In class _wfs_pin_func_key_detail, the attribute lppFDKs is a pointer to LPWFSPINFDK.

That is to say: lppFDKs is a pointer to pointer of _wfs_pin_fdk.

Maybe you forgot to set usNumberFDKs ? Inferring from the variable name, it seems to keep how many pointers to _wfs_pin_fdk are stored in lppFDKs.

Changing your example so that lppFDKs point to an array of multiple pointers:

WFSPINFUNCKEYDETAIL PinFunKeyDetail;

//três _wfs_pin_fdk
WFSPINFDK PinKeyA;
WFSPINFDK PinKeyB;
WFSPINFDK PinKeyC;

//(..algum código manipulado os _wfs_pin_fdk..)

//endereço dos três _wfs_pin_fdk , em array
LPWFSPINFDK PinKeys[3] = {
    &PinKeyA,
    &PinKeyB,
    &PinKeyC
};

//passa para lppFDKs o endereço da array de LPWFSPINFDK
PinFunKeyDetail.lppFDKs = PinKeys;

//palpite: esse atributo indica quandos elementos são apontados por lppFDKs 
PinFunKeyDetail.usNumberFDKs = 3;

You said that

the final programme does not recognise

But that’s very vague, I don’t know what program you’re referring to. Here is the online code, compiling on Ideone.