ROS&C++文件操作——获取当前工作路径的几种方法

CString FilePathName;
 char path[MAX_PATH];
 CFileDialog dlg(TRUE);
 //保存当前路径
 GetCurrentDirectory(MAX_PATH,path); // 文件目录保存在path这个字符数组中，
 if (dlg.DoModal()==IDOK) // 在这里，用文件对话框成功打开一个文件后，该目录就被修改为被打开的文件所在目录了
 {
 FilePathName=dlg.GetPathName();
 system.setReplayFile(FilePathName);  // 实际上是把这个文件名保存在CDataRecord类的 readFileDir 这个成员变量里
 }
 else
 {
 }
 //恢复当前路径
 SetCurrentDirectory(path); // 使目录重新恢复成了path这个目录

#include  <direct.h>  
#include  <stdio.h> 
char   buffer[MAX_PATH];   
getcwd(buffer, MAX_PATH);

string path = "D:\\newmap_build\\newmap_addressquery_proj\\Debug\\dict";
int npos = path.find_last_of("\\");
string subpath = path.substr(0,npos);
//结果subpath = D:\\newmap_build\\newmap_addressquery_proj\\Debug;

string path = "D:\\newmap_build\\newmap_addressquery_proj\\Debug\\dict.shp";
int npos = path.find_last_of(".");
string filename = path.substr(npos,path.length());
//结果subpath = .shp;

TCHAR szPath[_MAX_PATH]={0};
TCHAR szDrive[_MAX_DRIVE]={0};
TCHAR szDir[_MAX_DIR]={0};
TCHAR szFname[_MAX_FNAME]={0}; 
TCHAR szExt[_MAX_EXT]={0};
GetModuleFileName(NULL,szPath,sizeof(szPath));  
ZeroMemory(g_wszProgramPath,sizeof(g_wszProgramPath));
_wsplitpath_s(szPath, szDrive, szDir, szFname, szExt);
wsprintf(g_wszProgramPath,_T("%s%s"), szDrive, szDir);

CString path;   
GetModuleFileName(NULL,path.GetBufferSetLength(MAX_PATH+1),MAX_PATH);   
path.ReleaseBuffer();   
int pos = path.ReverseFind('\\');   
path = path.Left(pos);

BOOL APIENTRY DllMain( HMODULE hModule,
     DWORD  ul_reason_for_call,
     LPVOID lpReserved
  )

HMODULE h = GetModuleHandle("TestLibrary.dll");

#include<ros/package.h>
  std::string fisheye_setting = ros::package::getPath("real_sense_multi");