#include "stdafx.h"
#include "iostream.h"
#include "math.h"
#include "stdio.h"
#define P 206264.806247096355
#define PI 3.141592653589793
void GaosZ_fun()
{
printf("高斯投影的正算\n");
double l,L,B,n2,x,y,N,t,V,c,e2;
double i,j,k,n,h,a0,a4,a6,a3,a5,cB2;
int m;
e2=0.006738525414683;
c=6399698.901782711;
B=17.33557339*3600/P;
L=119.15521159*3600/P;
l=L-111*3600/P // l=((m%6)*3600+n*60+h)/P;
t=tan(B);
n2=e2*cos(B)*cos(B);
V=sqrt(1+n2);
cB2=pow(cos(B),2);
N=6399698.902-(21562.267-(108.973-0.612*cB2)*cB2)*cB2; // N=c/V; a0=32140.404-(135.3302-(0.7092-0.004*cB2)*cB2)*cB2;
a4=(0.25+0.00252*cB2)*cB2-0.04166;
a6=(0.166*cB2-0.084)*cB2;
a3=(0.3333333+0.001123*cB2)*cB2-0.1666667;
a5=0.0083-(0.1667-(0.1968+0.0040*cB2)*cB2)*cB2;
// x=X+N*sin(B)*cos(B)*l*l/2+N*sin(B)*pow(cos(B),3)*(5-t*t+9*n2+4*n2*n2)*pow(l,
4)/24+N*sin(B)*pow(cos(B),5)*(61-58*t*t+pow(t,4))*pow(l,6)/720;
// y=N*cos(B)*l+N*pow(cos(B),3)*(1-t*t+n2)*pow(l,5)/6+N*pow(cos(B),5)*(5-18*t*t +pow(t,4)+14*n2-58*n2*t*t)*pow(l,5)/120;
x=6367558.4969*B-(a0-(0.5+(a4+a6*l*l)*l*l)*l*l*N)*sin(B)*cos(B);
y=(1+(a3+a5*l*l)*l*l)*l*N*cos(B);
printf("x=%f\ny=%f\n",x,y);
}
void GaosF_fun()
{
printf("高斯投影的反算\n");
double B,Bf,Nf,b,b2,b3,b4,b5,Z,x,y,L0,l;