遍历文件

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#include <stdio.h>
#include <io.h>
#include <string>

int main()
{
    //目标文件夹路径
    std::string inPath = "C:\\Program Files\\*";//遍历文件夹下的所有文件
    //用于查找的句柄 win10用long long或者intptr_t，win7用long就可以了
    long long handle;
    struct _finddata_t fileinfo;
    //第一次查找
    handle = _findfirst(inPath.c_str(),&fileinfo);
    if(handle == -1)
        return -1;
    do
    {
        //找到的文件的文件名
        printf("%s\n", fileinfo.name);

    } while (!_findnext(handle,&fileinfo));

    _findclose(handle);
    system("pause");
    return 0;
}

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#include <stdio.h>
#include <io.h>
#include <string>

int main()
{
    //目标文件夹路径
    std::string inPath = "E:\\image\\image\\*.jpg";//遍历文件夹下的所有.jpg文件
    //用于查找的句柄 win10用long long或者intptr_t，win7用long就可以了
    long long handle;
    struct _finddata_t fileinfo;
    //第一次查找
    handle = _findfirst(inPath.c_str(),&fileinfo);
    if(handle == -1)
        return -1;
    do
    {
        //找到的文件的文件名
        printf("%s\n", fileinfo.name);

    } while (!_findnext(handle,&fileinfo));

    _findclose(handle);
    system("pause");
    return 0;
}

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#include <stdio.h>
#include <io.h>
#include <string>
#include <iostream>  
#include <fstream> 
#include<opencv2/opencv.hpp>
using namespace std;
using namespace cv;

int main()
{
    _finddata_t FileInfo; 
    //读取图片所在的路径
    string inPath = "E:\\image\\face\\negitive\\img\\"; 
    string strfind = inPath + "*";
    //用于查找的句柄 win10用long long或者intptr_t，win7用long就可以了
    long long Handle = _findfirst(strfind.c_str(), &FileInfo);
    char filename[300];
    Mat src;
    int k = 0;
    //输出txt文件（路径列表）所在的路径
    ofstream outfile("E:\\bg.txt", ofstream::app); 
    //输出dat文件（路径列表）所在的路径
    //ofstream outfile("E:\\bg.dat", ofstream::app); 
    if (Handle == -1L)
    {  
        cerr << "can not match the folder path" << endl;  
        exit(-1);
    }
    //namedWindow("input", WINDOW_AUTOSIZE);
    do{
        //判断是否有子目录  
        if (FileInfo.attrib & _A_SUBDIR)  
        {  
            if ((strcmp(FileInfo.name, ".") != 0) && (strcmp(FileInfo.name, "..") != 0))  
            {  
                inPath += FileInfo.name;
                cout <<inPath<<endl;  
            }
        }
        else
        {
            cout <<inPath<<FileInfo.name<<endl;
            //读取图片所在的路径
            string path = "E:/image/face/negitive/img/" + (string)FileInfo.name;
            src = imread(path);
            //显示读取的图片
            //imshow("input", src);
            //输出文件的路径
            sprintf_s(filename,"E:/image/face/negitive/img0/%d.jpg",k);
            //将读取到的图片重新按顺序命名输出
            imwrite(filename, src);
            outfile<<"img/"<<k<<".jpg\n";
            k++;
            waitKey(1);
        }  
    } while (_findnext(Handle, &FileInfo) == 0);  
    _findclose(Handle);   
    return 0;  
}