#include <iostream>
#include <math.h>

#define pi acos(-1.0)
#define r 6370
#define sq(x) ((x)*(x))
#define ss (2*(pi)*(r))

using namespace std;

double wd[3],wf[3],jd[3],jf[3] , w , j;
double a,b,x[3],y[3],z[3];
char ns[20],we[20];

int main ()
{
	int i;
	for( i = 1 ; i < 3 ; i++ )
	{
		cin>>wd[i]>>wf[i]>>ns[i]>>jd[i]>>jf[i]>>we[i];
		w = wd[i] + wf[i] / 60;
		if (ns[i] == 'S' && w < 90) 
			w = -w;
		w = w * ( pi / 180 );
		j = jd[i] + jf[i] / 60;
		if (we[i] == 'W' && j < 180) 
			j = -j;
		j = j * ( pi / 180 );
		z[i]=r*sin(w);
		x[i]=r*cos(j)*cos(w);
		y[i]=r*sin(j)*cos(w);
	}
	b=(sq(r)*2-(sq(z[1]-z[2])+sq(x[1]-x[2])+sq(y[1]-y[2])))/(2*sq(r));
	a=acos(b);
	b=a*r;
	if(b>ss/2)b=ss-b;
	printf ("%0.6lf\n",b);
	return (0);
}

• Re:为什么一直WA啊~莫非是精度问题~大牛来看一看啊 (9) kennybee 2007-10-02 19:37:16
  • Re:为什么一直WA啊~莫非是精度问题~大牛来看一看啊 (46) justjude 2007-10-02 20:03:56
    • Re:为什么一直WA啊~莫非是精度问题~大牛来看一看啊 (37) justjude 2007-10-02 20:09:04
      • #define pi acos(（double）-1) C++ WA , G++ AC 什么情况。。。彻底无语。。。 (0) justjude 2007-10-02 20:09:58
        • Re:#define pi 3.1415926 C++ AC了。。。 (0) justjude 2007-10-02 20:25:55
          • 我也想知道,C++为什么把精度降低反而AC. (0) AStar 2007-11-11 14:25:51