如何从我的C或c++代码中确定目录中的文件列表?
我不允许在程序中执行ls命令并解析结果。
如何从我的C或c++代码中确定目录中的文件列表?
我不允许在程序中执行ls命令并解析结果。
当前回答
简单地在Linux中使用ASCI C风格的代码
#include <bits/stdc++.h>
#include <dirent.h>
using namespace std;
int main(){
DIR *dpdf;
struct dirent *epdf;
dpdf = opendir("./");
if (dpdf != NULL){
while (epdf = readdir(dpdf)){
cout << epdf->d_name << std::endl;
}
}
closedir(dpdf);
return 0;
}
希望这能有所帮助!
其他回答
我认为,下面的代码片段可以用来列出所有的文件。
#include <stdio.h>
#include <dirent.h>
#include <sys/types.h>
int main(int argc, char** argv) {
list_dir("myFolderName");
return EXIT_SUCCESS;
}
static void list_dir(const char *path) {
struct dirent *entry;
DIR *dir = opendir(path);
if (dir == NULL) {
return;
}
while ((entry = readdir(dir)) != NULL) {
printf("%s\n",entry->d_name);
}
closedir(dir);
}
这是使用的结构(出现在direct .h中):
struct dirent {
ino_t d_ino; /* inode number */
off_t d_off; /* offset to the next dirent */
unsigned short d_reclen; /* length of this record */
unsigned char d_type; /* type of file */
char d_name[256]; /* filename */
};
我希望这段代码对您有所帮助。
#include <windows.h>
#include <iostream>
#include <string>
#include <vector>
using namespace std;
string wchar_t2string(const wchar_t *wchar)
{
string str = "";
int index = 0;
while(wchar[index] != 0)
{
str += (char)wchar[index];
++index;
}
return str;
}
wchar_t *string2wchar_t(const string &str)
{
wchar_t wchar[260];
int index = 0;
while(index < str.size())
{
wchar[index] = (wchar_t)str[index];
++index;
}
wchar[index] = 0;
return wchar;
}
vector<string> listFilesInDirectory(string directoryName)
{
WIN32_FIND_DATA FindFileData;
wchar_t * FileName = string2wchar_t(directoryName);
HANDLE hFind = FindFirstFile(FileName, &FindFileData);
vector<string> listFileNames;
listFileNames.push_back(wchar_t2string(FindFileData.cFileName));
while (FindNextFile(hFind, &FindFileData))
listFileNames.push_back(wchar_t2string(FindFileData.cFileName));
return listFileNames;
}
void main()
{
vector<string> listFiles;
listFiles = listFilesInDirectory("C:\\*.txt");
for each (string str in listFiles)
cout << str << endl;
}
看看这个使用win32 api的类。只需要构造一个实例,提供您想要清单的文件夹名,然后调用getNextFile方法从目录中获取下一个文件名。我认为它需要windows.h和stdio.h。
class FileGetter{
WIN32_FIND_DATAA found;
HANDLE hfind;
char folderstar[255];
int chk;
public:
FileGetter(char* folder){
sprintf(folderstar,"%s\\*.*",folder);
hfind = FindFirstFileA(folderstar,&found);
//skip .
FindNextFileA(hfind,&found);
}
int getNextFile(char* fname){
//skips .. when called for the first time
chk=FindNextFileA(hfind,&found);
if (chk)
strcpy(fname, found.cFileName);
return chk;
}
};
您可以使用std::experimental:: filesystem::directory_iterator()来获取根目录下的所有直接文件。然后,读取这些路径文件的名称。
#include <iostream>
#include <filesystem>
#include <string>
#include <direct.h>
using namespace std;
namespace fs = std::experimental::filesystem;
void ShowListFile(string path)
{
for(auto &p: fs::directory_iterator(path)) /*get directory */
cout<<p.path().filename()<<endl; // get file name
}
int main() {
ShowListFile("C:/Users/dell/Pictures/Camera Roll/");
getchar();
return 0;
}
基于上面的答案
#include <vector>
#include <string>
#include <algorithm>
#ifdef _WIN32
#include <windows.h>
std::vector<std::string> files_in_directory(std::string path)
{
std::vector<std::string> files;
// check directory exists
char fullpath[MAX_PATH];
GetFullPathName(path.c_str(), MAX_PATH, fullpath, 0);
std::string fp(fullpath);
if (GetFileAttributes(fp.c_str()) != FILE_ATTRIBUTE_DIRECTORY)
return files;
// get file names
WIN32_FIND_DATA findfiledata;
HANDLE hFind = FindFirstFile((LPCSTR)(fp + "\\*").c_str(), &findfiledata);
if (hFind != INVALID_HANDLE_VALUE)
{
do
{
files.push_back(findfiledata.cFileName);
}
while (FindNextFile(hFind, &findfiledata));
FindClose(hFind);
}
// delete current and parent directories
files.erase(std::find(files.begin(), files.end(), "."));
files.erase(std::find(files.begin(), files.end(), ".."));
// sort in alphabetical order
std::sort(files.begin(), files.end());
return files;
}
#else
#include <dirent.h>
std::vector<std::string> files_in_directory(std::string directory)
{
std::vector<std::string> files;
// open directory
DIR *dir;
dir = opendir(directory.c_str());
if (dir == NULL)
return files;
// get file names
struct dirent *ent;
while ((ent = readdir(dir)) != NULL)
files.push_back(ent->d_name);
closedir(dir);
// delete current and parent directories
files.erase(std::find(files.begin(), files.end(), "."));
files.erase(std::find(files.begin(), files.end(), ".."));
// sort in alphabetical order
std::sort(files.begin(), files.end());
return files;
}
#endif // _WIN32