结构匿名成员定义

#include

#include

#define u32 uint32_t

#deinfe u16 uint16_t

#define u8  uint8_t

struct biosregs {

union {

struct {

u32 edi;

u32 esi;

u32 ebp;

u32 _esp;

u32 ebx;

u32 edx;

u32 ecx;

u32 eax;

u32 _fsgs;

u32 _dses;

u32 eflags;

};

struct {

u16 di, hdi;

u16 si, hsi;

u16 bp, hbp;

u16 _sp, _hsp;

u16 bx, hbx;

u16 dx, hdx;

u16 cx, hcx;

u16 ax, hax;

u16 gs, fs;

u16 es, ds;

u16 flags, hflags;

};

struct {

u8 dil, dih, edi2, edi3;

u8 sil, sih, esi2, esi3;

u8 bpl, bph, ebp2, ebp3;

u8 _spl, _sph, _esp2, _esp3;

u8 bl, bh, ebx2, ebx3;

u8 dl, dh, edx2, edx3;

u8 cl, ch, ecx2, ecx3;

u8 al, ah, eax2, eax3;

};

};

};

int main()

{

struct biosregs reg;

reg.ax = 0x1111;

reg.bx = 0x2222;

printf("%x\t%x\n",reg.eax,reg.ebx);

return 0;

}