聯合體中嵌套結構體定義

 1 /* 第一種方法 */
 2 typedef union  3 {  4     struct VEHICLE_s  5  {  6  TERMINAL_DATA_s sTerminal_Obj;  7  GPS_DATA_s sGps_Obj;  8  TMPS_DATA_s sTmps_Obj;  9  POSE_DATA_s sPose_Obj; 10  OBD_DATA_s sObd_Obj; 11  }Vehicle_Obj; 12     uint8_t Vehicle_Bytes[sizeof(struct VEHICLE_s)]; 13 }VEHICLE_MONIT_u; 14 
15 
16 
17 /* 第二種方法 */
18 typedef struct 
19 { 20  TERMINAL_DATA_s sTerminal_Obj; 21  GPS_DATA_s sGps_Obj; 22  TMPS_DATA_s sTmps_Obj; 23  POSE_DATA_s sPose_Obj; 24  OBD_DATA_s sObd_Obj; 25 }VEHICLE_s; 26 
27 typedef union 28 { 29  VEHICLE_s Vehicle_Obj; 30     uint8_t Vehicle_Bytes[sizeof(struct VEHICLE_s)];    /* 第1種表示 */
31     uint8_t Vehicle_Bytes[sizeof(VEHICLE_s)];           /* 第2種表示 */  
32 }VEHICLE_MONIT_u; 33 
34 
35 
36 /* 第三種方法(失敗) */
37 typedef struct 
38 { 39  TERMINAL_DATA_s sTerminal_Obj; 40  GPS_DATA_s sGps_Obj; 41  TMPS_DATA_s sTmps_Obj; 42  POSE_DATA_s sPose_Obj; 43  OBD_DATA_s sObd_Obj; 44 }VEHICLE_s; 45 
46 typedef union 47 { 48  VEHICLE_s Vehicle_Obj; 49     uint8_t Vehicle_Bytes[sizeof(Vehicle_Obj)]; 50 }VEHICLE_MONIT_u;