C 带结构指针数组的嵌套结构

主体结构

typedef struct {
   uint8 u8Status;
   uint8 u8NeighborTableEntries;
   uint8 u8StartIndex;
   uint8 u8NeighborTableListCount;
   /* Rest of the message is variable length */
   ZPS_tsAplZdpDiscNtEntry* pNetworkTableList;
                                              //pNetworkTableList is a pointer to 
                                              //the first   
                                              //entry in the list of reported
                                              //Neighbour table entries
 } ZPS_tsAplZdpMgmtLqiRsp;


typedef struct
{
   uint64 u64ExtPanId;
   uint64 u64ExtendedAddress;
   uint16 u16NwkAddr;
   uint8 u8LinkQuality;
   uint8 u8Depth;
   union
   {
     struct
     {
       unsigned u2DeviceType:2;
       unsigned u2RxOnWhenIdle:2;
       unsigned u2Relationship:3;
       unsigned u1Reserved1:1;
       unsigned u2PermitJoining:2;
       unsigned u6Reserved2:6;
    } ;
    uint8 au8Field[2];
 } uAncAttrs;
} ZPS_tsAplZdpDiscNtEntry;

我已经定义了ZPS_tsAplZdpMgmtLqiRsp*指针

这似乎没问题

pointer->u8Status
pointer->u8NeighborTableEntries
pointer->u8StartIndex
pointer->u8NeighborTableListCount

---

但是我如何访问ZPS_tsaplzdpdiscontentry结构中的那些值

您可以通过：

指针->pNetworkTableList

typedef struct {
   uint8 u8Status;
   uint8 u8NeighborTableEntries;
   uint8 u8StartIndex;
   uint8 u8NeighborTableListCount;
   /* Rest of the message is variable length */
   ZPS_tsAplZdpDiscNtEntry* pNetworkTableList;
                                              //pNetworkTableList is a pointer to 
                                              //the first   
                                              //entry in the list of reported
                                              //Neighbour table entries
 } ZPS_tsAplZdpMgmtLqiRsp;


typedef struct
{
   uint64 u64ExtPanId;
   uint64 u64ExtendedAddress;
   uint16 u16NwkAddr;
   uint8 u8LinkQuality;
   uint8 u8Depth;
   union
   {
     struct
     {
       unsigned u2DeviceType:2;
       unsigned u2RxOnWhenIdle:2;
       unsigned u2Relationship:3;
       unsigned u1Reserved1:1;
       unsigned u2PermitJoining:2;
       unsigned u6Reserved2:6;
    } ;
    uint8 au8Field[2];
 } uAncAttrs;
} ZPS_tsAplZdpDiscNtEntry;

因此，您可以从那里访问结构的所有元素

e、 g.访问索引为0的元素的u64ExtPanId：

pointer->pNetworkTableList[0].u64ExtPanId = 1232;

---

您有指针，但没有结构本身的实例。 做下一步：

ZPS_tsAplZdpMgmtLqiRsp *pointer = (ZPS_tsAplZdpMgmtLqiRsp *)malloc(sizeof(ZPS_tsAplZdpMgmtLqiRsp));

。。。是的，您也应该为pNetworkTableList分配内存：

pointer->pNetworkTableList = (ZPS_tsAplZdpDiscNtEntry *)malloc(sizeof(ZPS_tsAplZdpDiscNtEntry));

那么你可以

做

等等

别忘了做点什么

free(pointer->pNetworkTableList);
free(pointer);

---

在工作结束时。

如果您有堆栈转储，而没有为结构分配内存，请参阅陪审员回答如何执行。malloc的返回值不应强制转换，我更喜欢calloc。我多年前在纯C中工作。我可能会忘记一些细节：-）。void*类型在C中是否隐式转换为其他类型？是的，许多年前这是必要的，但现在不是。它隐式地转换为正确的类型，从而避免了代码混乱和错误的转换。看见