[초보]C언어 배열 관련 질문입니다!!

void Data_Write(unsigned int addr, unsigned char* data, unsigned short len)
{
	unsigned char i;
 
 
        for(i=0; i<len; i++)
	{
		buf[i+2] = data[i];
	}
}

int main(void)
{
	signed int B_1 = 1234567890;
 
	Data_Write(A, (unsigned char *) &B_1, C);
}