ex1.c

零基础单片机C语言设计全套教程

#include<stddef.h>								//头文件
#include <stdio.h>

struct Mystruct 								//自定义结构
{
	unsigned	long	num;
unsigned	char	type;
	unsigned	int	len;
};

typedef struct Mystruct index;						//声明index

void main(void)									//主函数
{
int	x,y;
x =offsetof(index,num);							//调用offsetof，计算偏移量
y=offsetof(struct Mystruct,len);						//调用offsetof，计算偏移量
printf("x=%d,y=%d\n",x,y);							//输出结果
}