uniondef.h

来自「128×64液晶屏显示汉字」· C头文件 代码 · 共 44 行

/*
	uniondef.h
	定义联合整型和联合长整型数据结构
	UnionInt的定义为访问整型变量的字节部分提供了方便
	UnionLong的定义为访问长整型变量的字节或字部分提供了方便
*/


#ifndef _UNIONDEF_H_
#define _UNIONDEF_H_


typedef union
{
	unsigned int i;
	struct
	{
		unsigned char H;
		unsigned char L;
	}CharPart;
}UnionInt;


typedef union
{
	unsigned long l;
	struct
	{
		unsigned int H;
		unsigned int L;
	}IntPart;
	struct
	{
		unsigned char HH;
		unsigned char HL;
		unsigned char LH;
		unsigned char LL;
	}CharPart;
}UnionLong;


#endif  //_UNIONDEF_H_