编辑代码

#include <stdio.h>


typedef enum EN{

    a=0x33,
    b=0x22,
    c=0x11
}EN;


typedef union UN1{

    int a;
    char b;
    float c;
}UN1;

#define maxun 3

typedef union UN2{

    int a;
    char b;
    UN1 UNKey[maxun];
}UN2;

typedef struct AD {

    int a ;
    char b;
    float c;
}AD;

#define maxbuff 3

typedef struct AD1{
  int a;
  char b;
  AD ADKey[maxbuff];

}AD1;

typedef union UN3{

    int a;
    char b;
    AD1 UNAD;
}UN3;


AD1 ADT;
UN2 UNT;


int main () {
   
 
  ADT.ADKey[2].a=1;
  UNT.UNKey[2].b=1;
  UNT.b=1;

  printf("VAL:%d\r\n",ADT.ADKey[2].a);

  printf("SIZE:%d\r\nSIZE:%d\r\n",sizeof(AD),sizeof(AD1));
  printf("----------------------------------\r\n");

  printf("UNSIZE:%d\r\n",sizeof(UN1));

  printf("UN2SIZE:%d\r\n",sizeof(UN2));

  printf("UN2VAL:%d\r\n",UNT.UNKey[2].b);
  printf("UN2VAL:%d\r\n",UNT.a);
  printf("----------------------------------\r\n");

  
  printf("ENSIZE:%d\r\n",sizeof(EN));

  printf("----------------------------------\r\n");

 // printf("UNADSIZE:%d\r\n",sizeof(UNAD));






   printf("OK!");
	return 0;
}