错误lnk2001:闭锁，readdir，opendir

Question

我正在尝试将一个c++项目从linux导入到windows (vs2010)。我的问题是使用污染引起的。我已经从这里下载了dirent的windows版本：分流。然而，当我编译我的项目时，我会得到以下错误：

1>DBreading.obj : error LNK2001: unresolved external symbol _closedir
1>DBreading.obj : error LNK2001: unresolved external symbol _readdir
1>DBreading.obj : error LNK2001: unresolved external symbol _opendir

我做了一点研究，发现我正在使用一些unix函数。我的代码是：

#include <DBreading.h>
#include <Detection.h>

#define _POSIX_SOURCE
#include <sys/stat.h>
#include <unistd.h>
#undef _POSIX_SOURCE

DBreading::DBreading(){}

vector <string> DBreading::listFile(string path){

    vector<string> directories;

    DIR *pDIR;
    const char * c = path.c_str();
    struct dirent *entry;
    if( pDIR=opendir(c) ){
        while(entry = readdir(pDIR)){
        if( strcmp(entry->d_name, ".") != 0 && strcmp(entry->d_name, "..") != 0 )
            //cout << entry->d_name << "\n";
            directories.push_back( entry->d_name);
        }
        closedir(pDIR);
    }

    // directories stores all subfolders or sub-files of a given path directory
    return directories;
}

您知道窗口中的闭锁器、readdir和opendir的对应函数是什么吗？

1>------ Rebuild All started: Project: myProject, Configuration: Release Win32 ------
1>  DBreading.cpp
1>DBreading.cpp(46): warning C4018: '<' : signed/unsigned mismatch
1>DBreading.cpp(52): warning C4018: '<' : signed/unsigned mismatch
1>DBreading.cpp(53): warning C4018: '<' : signed/unsigned mismatch
1>DBreading.cpp(90): warning C4018: '<' : signed/unsigned mismatch
1>DBreading.cpp(97): warning C4018: '<' : signed/unsigned mismatch
1>DBreading.cpp(116): warning C4018: '<' : signed/unsigned mismatch
1>DBreading.cpp(122): warning C4018: '<' : signed/unsigned mismatch
1>DBreading.cpp(123): warning C4018: '<' : signed/unsigned mismatch
1>DBreading.cpp(159): warning C4018: '<' : signed/unsigned mismatch
1>DBreading.cpp(166): warning C4018: '<' : signed/unsigned mismatch
1>  Detection.cpp
1>c:\opencv-2.4.6.1\install\include\opencv2\flann\logger.h(66): warning C4996: 'fopen':    
 This function or variable may be unsafe. Consider using fopen_s instead. To disable   
 deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
  1>          C:\Program Files\Microsoft Visual Studio 10.0\VC\include\stdio.h(234) :
 see 
declaration of 'fopen'
1>  main.cpp
1>main.cpp(120): warning C4018: '<' : signed/unsigned mismatch
1>main.cpp(166): warning C4018: '<' : signed/unsigned mismatch
1>main.cpp(182): warning C4018: '<' : signed/unsigned mismatch
1>main.cpp(206): warning C4018: '<' : signed/unsigned mismatch
1>main.cpp(268): warning C4018: '<' : signed/unsigned mismatch
1>DBreading.obj : error LNK2001: unresolved external symbol _closedir
1>DBreading.obj : error LNK2001: unresolved external symbol _readdir
1>DBreading.obj : error LNK2001: unresolved external symbol _opendir
1>C:\Documents and Settings\chrathan.ITI-THERMI\My Documents\Visual Studio    
2010\Projects\myProject\Release\myProject.exe : fatal error LNK1120: 3 unresolved 

Answer 1

您可以使用FindFirstFile、FindNextFile和FindClose (我相信它们在windows.h中)。

有关示例，请参见这篇MSDN文章。