结构体嵌套联合体c语言,联合体嵌套结构体

#include

#include

typedef unsigned char UINT8;

struct entity { char char0; char char1; char char2; char char3; unsigned short char4;};

union name{ char _name[6]; struct entity Fname;};

struct FLAG {

UINT8 bit0 : 1;

UINT8 bit1 : 1;

UINT8 bit2 : 1;

UINT8 bit3 : 1;

UINT8 bit4 : 1;

UINT8 bit5 : 1;

UINT8 bit6 : 1;

UINT8 bit7 : 1;

};

// 联合体里面套用结构体

union FLAGS { UINT8 byte; struct FLAG bit;};

union name myname;

volatile union FLAGS net_flag;

#define DEV_DIS         net_flag.bit.bit0

#define ON      1

void main() {

char *test = "abcdA";

char _test[] = "abcdA";

char __test[6] = "abcdA";

// 分别输出串长度、指针地址size、[]声明字符串会自动加\0结束符，即长度自动加1

printf("test strlen :%d sizeof(test) :%d sizeof(_test) :%d\n",st