C++双整数转双字节16进制

双整数转双字节16进制：

int data_l=256；

unsigned char datalength[2] = { 0 };

if (data_l

datalength[0] = 0x00;

datalength[1] = data_l;

} else {

datalength[1] = data_l & 0xFF;

datalength[0] = (data_l & 0xFF00) >> 8;

}

双字节16进制转整数：

char a = 0x80;//低位

char b = 0x00;//高位

int value = (int)((unsigned char)a | (unsigned char)b

unsigned char map_l[2]={0};

memcpy(&map_l,&buffer[j+4],2);

int m_l = (int)(map_l[1]| map_l[0]

int i=-190;

unsigned char * ia=(unsigned char *)&i;

int *p = (int*)ia;