学步园

typedef struct
{
 BYTE identity:1;
 BYTE type:3;
 BYTE renew:2;
 BYTE del:2;
}ST_Test;

sizeof(ST_Test);// 1

typedef struct
{
 BYTE identity:1;
 BYTE type:3;
 BYTE renew:2;
 BYTE del:3;
}ST_Test;

sizeof(ST_Test);// 2