#include?
#include?
#include?

#define?PI				3.1415926535897932
#define?EARTH_RADIUS	（6378.14?*?1000）

double?G_Distance（double?lng1?double?lat1?double?lng2?double?lat2）
{
	double?r_lat1?r_lat2;
	double?a?b?result;
	
	r_lat1?=?lat1?*?PI?/?180;
	r_lat2?=?lat2?*?PI?/?180;
	a?=?r_lat2?-?r_lat1;
	b?=?（lng1?-?lng2）?*?PI?/?180;
	
	//=2*ASIN（SQRT（SQR（SIN（G25/2））+COS（E25）*COS（F25）*SQR（SIN（H25/2））））*$B$22*1000
	result?=?2?*?asin（sqrt（pow（sin（a?/?2）2）?+?cos（r_lat1）?*?cos（r_lat2）?*?pow（sin（b?/?2）2）））?*?EARTH_RADIUS;
	
	return?result;	
}

void?main（?void?）
{
	double?x1?=?120?y1?=?38?x2?=?121?y2?=?39;

	printf（“\nDistance:?（%f%f）?-?（%f%f）?=?%fm“?
			x1?y1?x2?y2?G_Distance（x1?y1?x2?y2））;
	printf（“\nPress?any?key?to?exit...“）;
	

?屬性????????????大小?????日期????時間???名稱
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?????文件????????541??2009-10-19?15:29??Distance.dsw

?????文件??????33792??2009-10-19?15:29??Distance.ncb

?????文件??????48640??2009-10-19?15:29??Distance.opt

?????文件???????1190??2009-10-19?15:15??Distance.plg

?????文件??????13824??2009-10-19?15:32??Distance.xls

?????文件???????1038??2009-10-19?14:54??Distance.bas

?????文件????????813??2009-10-19?15:15??Distance.cpp

?????文件???????3425??2009-10-19?15:13??Distance.dsp

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???????????????103263????????????????????8