Linux 如何将文件从一个文件夹复制到另一个文件夹
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How to copy a file from a folder to another folder
提问by user1165435
How do I copy a file from one folder to another folder using C++?
如何使用 C++ 将文件从一个文件夹复制到另一个文件夹？
回答by jjlin
If you're willing to use the Boost C++ libraries, take a look at filesystem::copy_file().
如果您愿意使用 Boost C++ 库，请查看filesystem::copy_file()。
Here's a previous question covering copy_file():
这是上一个涉及 copy_file() 的问题：
回答by CapelliC
This should be the minimal code required:
这应该是所需的最少代码：
#include <fstream>
// copy in binary mode
bool copyFile(const char *SRC, const char* DEST)
{
std::ifstream src(SRC, std::ios::binary);
std::ofstream dest(DEST, std::ios::binary);
dest << src.rdbuf();
return src && dest;
}
int main(int argc, char *argv[])
{
return copyFile(argv[1], argv[2]) ? 0 : 1;
}
it glosses around some potentially complicated issues: error handling, filename character encodings... but could give you a start.
它掩盖了一些潜在的复杂问题：错误处理、文件名字符编码......但可以给你一个开始。
回答by Sandeep Sharma
The code below will copy all the file from one directory to another.
下面的代码会将所有文件从一个目录复制到另一个目录。
Its working code in C++
它在 C++ 中的工作代码
#include <windows.h>
/*
BOOL Copy(char r_szPath[1024], char r_szDir[1024])
{
char l_szTemp[2048] = {0};
sprintf(l_szTemp,"%s\%s"r_szPath,r_szDir);
if(IsDirectory(
}*/
#include <stdio.h>
#include<conio.h>
BOOL __Copy(char r_szSrcPath[1024],char r_szDesPath[1024])
{
WIN32_FIND_DATA FindFileData;
HANDLE hFind;
char l_szTmp[1025] = {0};
memcpy(l_szTmp,r_szSrcPath,1024);
char l_szSrcPath[1025] = {0};
char l_szDesPath[1025] = {0};
memcpy(l_szSrcPath,r_szSrcPath,1024);
memcpy(l_szDesPath,r_szDesPath,1024);
char l_szNewSrcPath[1025] = {0};
char l_szNewDesPath[1025] = {0};
strcat(l_szTmp,"*");
hFind = FindFirstFile(l_szTmp, &FindFileData);
if(hFind == NULL) return FALSE;
do
{
if(FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
if(strcmp(FindFileData.cFileName,"."))
{
if(strcmp(FindFileData.cFileName,".."))
{
printf ("The Directory found is %s<BR>, FindFileData.cFileName);
sprintf(l_szNewDesPath,"%s%s\",l_szDesPath,FindFileData.cFileName);
sprintf(l_szNewSrcPath,"%s%s\",l_szSrcPath,FindFileData.cFileName);
CreateDirectory(l_szNewDesPath,NULL);
__Copy(l_szNewSrcPath,l_szNewDesPath);
}
}
}
else
{
printf ("The File found is %s<BR>, FindFileData.cFileName);
char l_szSrcFile[1025] = {0};
char l_szDesFile[1025] = {0};
sprintf(l_szDesFile,"%s%s",l_szDesPath,FindFileData.cFileName);
sprintf(l_szSrcFile,"%s%s",l_szSrcPath,FindFileData.cFileName);
BOOL l_bRet = CopyFile(l_szSrcFile,l_szDesFile,TRUE);
}
}
while(FindNextFile(hFind, &FindFileData));
FindClose(hFind);
return TRUE;
}
int main(int argc, char *argv[])
{
__Copy("C:\fcdb\","E:\sandy\");
getch();
return 0;
}
回答by Roi Danton
With std::filesystem::copy_filefrom C++17:
与std::filesystem::copy_file从C ++ 17：
#include <exception>
#include <filesystem>
#include <iostream>
namespace fs = std::filesystem;
int main()
{
fs::path sourceFile = "path/to/sourceFile.ext";
fs::path targetParent = "path/to/target";
auto target = targetParent / sourceFile.filename(); // sourceFile.filename() returns "sourceFile.ext".
try // If you want to avoid exception handling, then use the error code overload of the following functions.
{
fs::create_directories(targetParent); // Recursively create target directory if not existing.
fs::copy_file(sourceFile, target, fs::copy_options::overwrite_existing);
}
catch (std::exception& e) // Not using fs::filesystem_error since std::bad_alloc can throw too.
{
std::cout << e.what();
}
}
I've used std::filesystem::path::filenameto retrieve the source filename without having to type it manually. However, with std::filesystem::copyyou can omit passing the filename to the target path at all:
我习惯于std::filesystem::path::filename检索源文件名，而无需手动输入。但是，std::filesystem::copy您可以完全省略将文件名传递给目标路径：
fs::copy(sourceFile, targetParent, fs::copy_options::overwrite_existing);
Change the behaviour of both functions with std::filesystem::copy_options.
使用 更改两个函数的行为std::filesystem::copy_options。
