#include <io.h>  
#include <iostream>  
#include <cstring>  
#include <string>

using namespace std; 
//讀取資料夾設定
const string path = "D:\\pp\\";


int main(){  
    _finddata_t file;  
    long lf;  
    if((lf = _findfirst((path + "*.*").c_str(), &file))==-1)  
        cout
 
<<"Not Found!"<<endl;  
    else{  
       // cout<<"file name list:"<<endl;  
        while(_findnext( lf, &file)==0){  
            {  
                string str=file.name;  
                //修改副檔名為.jpeg
                str += ".jpeg";
                //重新命名檔案
                if
 
 (rename((path + string(file.name)).c_str(), (path + str).c_str()) == 0)
                {
                    //cout << "1" << endl;
                }
            }  
        }  
    }  
    _findclose(lf);  
    return 0;  
}