以下是有关如何在文件夹中查找具有特殊扩展名的文件的演示：

#include"pch.h"
#include<iostream>
#include<io.h>
#include<vector>
#include<string>
#include <Windows.h>

int get_files(std::string fileFolderPath,std::string fileExtension,std::vector<std::string>& file)
{
    std::string fileFolder = fileFolderPath + "\\*" + fileExtension;
    std::string fileName;
    struct _finddata_t fileInfo;
    long long findResult = _findfirst(fileFolder.c_str(),&fileInfo);
    if (findResult == -1)
    {
        _findclose(findResult);
        return 0;
    }
    bool flag = 0;



    do
    {
        fileName = fileFolderPath + "\\" + fileInfo.name;
        if (fileInfo.attrib == _A_ARCH)
        {
            file.push_back(fileName);
        }
    } while (_findnext(findResult,&fileInfo) == 0);



    _findclose(findResult);
}



int main()
{
    //Folder Path
    std::string fileFolderPath = "D:";




    std::cout << "Output all files in jpeg/JPEG format in the current directory" << std::endl;
    std::vector<std::string> jpeg_files;
    std::string fileExtension_jpeg = ".jpeg";
    get_files(fileFolderPath,fileExtension_jpeg,jpeg_files);



    for (int i = 0; i < jpeg_files.size(); i++)
    {
        std::cout << jpeg_files[i] << std::endl;
    }



    std::cout << "\nOutput all files in jpg/JPG format in the current directory" << std::endl;
    std::vector<std::string> jpg_files;
    std::string fileExtension_jpg = ".jpg";
    get_files(fileFolderPath,fileExtension_jpg,jpg_files);



    for (int i = 0; i < jpg_files.size(); i++)
    {
        std::cout << jpg_files[i] << std::endl;
    }
return 0;
}

您可以获取过滤后的文件路径和文件名。然后，您可以尝试使用CopyFile  复制文件。