my.c

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#include "reg51.h"

sfr  ERR=0XFF; 

typedef union s
{
  char ay[2];
  int a;
  int b;
}s;

typedef struct ss1
{
  char ay[2];
  int *p;
  int b;
}ss1;

pdata ss1 s3;
struct mystruct
{
   int           i:2;
   unsigned      j:5;
   int            :3;
   int           k:1;
   unsigned      m:5;
} a={1,2,0,7};

int aa;
struct s pdata *ps1;

main()
{
   int i=-1,c=3;
   char ch=0x80;
   struct s data aa[2][2][3];   
   bit bf,bf1,bf2;
   bf=1;
   bf1=0;
   bf2=1;
   P1=0XFF;
   s3.b=5;
   s3.p=&i;
   
   for(i=0;i<10000;i++);
   while(1)
   {   
       struct s s1;
       char data *p;
       float *p1;
       long l=0x00000043;
       float d=3.1415926;
       p1=&d;
       ps1 = &s1;  
       p=aa[0][0][0].ay;
       aa[0][0][0].ay[0]=0x58;
       ps1->a=1;
       ps1->ay[0]=0x12;
       ps1->b=2;
  }
}