多选题

下面哪种方法可以避免编译器对结构体进行对齐优化？（）

Question

A.

struct {
unsigned char head
unsigned char sector
unsigned char cylinder
}

B.

struct {
unsigned char head
unsigned char sector
unsigned char cylinder
}__attribute__((pack))

C.

struct {
unsigned char head
unsigned char sector
unsigned char cylinder
}__attribute__((packed))

D.

struct {
unsigned char head
unsigned char sector
unsigned char cylinder
}__attribute__((aligned(0)))