理解android HAL中的结构体转化时做的c的例子

1,Android中HAL如何向上层提供接口总结

http://blog.youkuaiyun.com/flydream0/article/details/7086273

2,理解里面的HAL时，由于对C及C＋＋不熟悉，所以做一个简单的c语言的例子如下：

#include<stdio.h>
struct x_short {
	int a;
	int b;
};

struct x_hight {
	//int h;
	struct x_short sh;
	int h;
	int w;
};

int main(){
	struct x_hight  p={
	  sh : {
		a:10,
		b:11,
	  },
	  h:30,
	  w:31,
	};
	struct x_short *s=&(p.sh);
	printf("short:a=%d,b=%d\n",s->a,s->b);
	struct x_hight *ss=(struct x_hight *)s;
	printf("hight: sh.a=%d,sh.b=%d,h=%d,w=%d\n",ss->sh.a,ss->sh.b,ss->h,ss->w);
}