C语言共用体（union）

最新推荐文章于 2026-01-05 22:36:07 发布

原创最新推荐文章于 2026-01-05 22:36:07 发布 · 366 阅读

1 ·

CC 4.0 BY-SA版权

文章标签：

#c语言 #算法 #开发语言

程序：

#include "stdio.h"


typedef union
{
	struct
	{
		unsigned char D1;
		unsigned char D2;
		unsigned char D3;
		unsigned char D4;
		unsigned char D5;
	}u1_1;
	struct
	{
		unsigned char D1;
		unsigned char D2;
		unsigned char D3;
		unsigned char D4;
		unsigned char D5;
	}u1_2;
	unsigned char Data[5];
}union_u1; 



int main()
{
	union_u1 U1;
	U1.u1_1.D1=0X01;
	U1.u1_1.D2=0X02;
	U1.u1_1.D3=0X03;
	U1.u1_1.D4=0X04;
	U1.u1_1.D5=0X05;
	for(unsigned char i=0;i<5;i++)
		printf("Data[%d] = %#X \r\n",i,U1.Data[i]);
	printf("=============================\r\n");	
	U1.u1_2.D1=0X10;	
	U1.u1_2.D2=0X20;	
	U1.u1_2.D3=0X30;	
	U1.u1_2.D4=0X40;	
	U1.u1_2.D5=0X50;	
	for(unsigned char i=0;i<5;i++)
		printf("Data[%d] = %#X \r\n",i,U1.Data[i]);	
}