自定义长度

#pragma pack(1)
struct textdata{
	long send_rate:40;
	long send_null:8;
	long send_energy:16;

	long temp_B:8;
	long temp_A:8;
	long temp_son:8;
	long temp_null:40;

	long tude_long:40;
	long tude_indi:8;
	long tude_null:16;

	long azimuth_angle:16;
	long angle_indi:8;
	long angle_null:8;
	long tude_lati:32;

};
#pragma pack()