#include?“iostream.h“
#include?“stdio.h“
#include?“afx.h“
#include?“math.h“
void?readdata（）;//讀取導航文件數據
void?dealdata（）;//處理導航文件數據
typedef?struct?Navedata?//定義導航數據存儲結構
{
	int?PRN;//衛星的PRn號
	int?yearmonthdayhourminute;????//衛星鐘參考時刻
	double?second;
	double???a0a1a2;????//衛星鐘飄參數
	double???IODECrsDeltNM0;????//數據星歷發布時間，在軌道徑向方向上周期改正正弦的振幅
	double???CuceCussqrtA;???//軌道延跡方向上周期改正余弦振幅?、扁心率、軌道延跡方向上周期改正正弦振幅?、長半軸平方根?
	double???ToeCicOMEGACis;???//星歷參考時刻、軌道傾角周期改正余弦項振幅、參考時刻升交點赤徑主項、軌道傾角周期改正正弦項振幅
	double???i0CrcomegaOMEGADOT;??//參考時間軌道傾角、在軌道徑向方向上周期改正余余弦的振幅、近地點角距、升交點赤徑在赤道平面中的長期變化
	double???IDOTL2CGPSWeekL2P;????////軌道傾角變化率、gps周等
????double???AccuracyofSatHealthofSatTGDIODC;???//衛星精度、衛星健康、電離層群遲改正數
	double???eight1eight2eight3eight4;//導航數據第八行的參數（計算中不用）
};
typedef?struct?xyz
{
	int?prn;
	double?xyz;
};
#define?allstarnum?9?//導航文件中需要計算的衛星的個數
struct?Navedata?stars[allstarnum];//定義每個衛星數據的結構數組
struct?xyz?positions[allstarnum];?//每個衛星坐標的結構數組
void?readdata（）//讀取數據文件
{
	CStdioFile?fpt;
????CString?string;
	BOOL?isend=fpt.Open（“50191100.10n“CFile::modeRead）;//打開導航文件
	if（!isend）
	printf（“file?open?failed!“）;
	int?headlinenum=0;
????while?（isend）//讀取頭文件
????{
		isend=fpt.ReadString（string）;
????????headlinenum++;
		int?headend=string.Find（“END?OF?HEADER“）;
		if?（-1!=headend）
		break;
	}
????fpt.SeekToBegin（）;//把指針指到文件的開頭
	for?（int?i=0;i	isend=fpt.ReadString（string）;
	for?（i=0;i	{
		//讀取數據部分的第一行prnyear等
		isend=fpt.ReadString（string）;
		string.Replace（‘D‘‘e‘）;
		sscanf（string“%d?%d?%d?%d?%d?%d?%lf?%lf?%lf?%lf“?&stars[i].PRN&stars[i].year&stars[i].month&stars[i].day&stars[i].hour&stars[i].minute&stars[i].second?&stars[i].a0?&stars[i].a1?&stars[i].a2）;
????????//讀取IDOTCrsdeltn，m0；
		isend=fpt.ReadString（string）;
		string.Replace（‘D‘‘e‘）;
		sscanf（string“%lf?%lf?%lf?%lf“&stars[i].IDOT&stars[i].Crs&stars[i].DeltN&stars[i].M0）;
????????//讀取cuc，e，cus，sqrta
		isend=fpt.ReadString（string）;
		string.Replace（‘D‘‘e‘）;
		sscanf（string“%lf?%lf?%lf?%lf“&stars[i].Cuc?&stars[i].e?&stars[i].Cus?&stars[i].sqrtA）;
????????//讀取toe，cic，omega，cis
		isend=fpt.ReadString（string）;
		string.Replace（‘D‘‘e‘）;
????????sscanf（string“%lf?%lf?%lf?%lf“&stars[i].Toe?&stars[i].Cic?&stars[i].OMEGA?&stars[i].Cis）;
		//讀取i0，crc，omega，omegadot
		isend=fpt.ReadString（string）;
		string.Replace（‘D‘‘e‘）;
		sscanf（string“%lf?%lf?%lf?%lf“&stars[i].i0?&stars[i].Crc?&stars[i].omega?&stars[i].OMEGADOT）;
????????//讀取idot，l2c，gpsweek，l2p
		isend=fpt.ReadString（string）;
		string.Replace（‘D‘‘e‘）;
		sscanf（string“%lf?%lf?%lf?%lf“?&stars[i].IDOT?&stars[i].L2C?&stars[i].GPSWeek?&stars[i].L2P）;
		//讀取accracyofsat等
		isend=fpt.ReadString（string）;
		string.Replace（‘D‘‘e‘）;
		sscanf（string“%lf?%lf?%lf?%lf“&stars[i].AccuracyofSat?&stars[i].HealthofSat?&stars[i].TGD?&stars[i].IODC）;
????????//讀取eight等?
		isend=fpt.ReadString（stri

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????1355928??2010-05-30?23:00??Debug\2008302590115.exe

?????文件????1734032??2010-05-30?23:00??Debug\2008302590115.ilk

?????文件??????17027??2010-05-30?23:00??Debug\2008302590115.obj

?????文件????2626508??2010-05-30?14:19??Debug\2008302590115.pch

?????文件????2769920??2010-05-30?15:27??Debug\2008302590115.pdb

?????文件?????132096??2010-05-30?23:00??Debug\vc60.idb

?????文件??????69632??2010-05-30?15:27??Debug\vc60.pdb

?????文件???????6488??2010-04-26?16:24??50191100.10n

?????文件???????5286??2010-05-30?15:27??2008302590115.cpp

?????文件???????4146??2010-05-30?13:42??2008302590115.dsp

?????文件????????551??2010-05-30?09:11??2008302590115.dsw

?????文件??????41984??2010-05-30?23:01??2008302590115.ncb

?????文件??????54784??2010-05-30?23:01??2008302590115.opt

?????文件????????501??2010-05-30?23:00??2008302590115.plg

?????目錄??????????0??2010-05-30?15:27??Debug

-----------?---------??----------?-----??----

??????????????8818883????????????????????15