C++将指定文件夹下的所有文件（包含子目录）复制到另一文件夹下

使用递归算法遍历指定文件夹，并将其中的文件和子目录复制到另一文件夹下，代码如下：

#include <stdlib.h>
#include <direct.h>
#include <string.h>
#include <io.h>
#include <stdio.h>
#include <iostream>
#include <conio.h>
#include <process.h>
#include <windows.h>
using namespace std;

#define BUF_SIZE 256
int copyFile(const char * pSrc,const char *pDes)
{
    FILE *in_file, *out_file;
    char data[BUF_SIZE];
    size_t bytes_in, bytes_out;
    long len = 0;
    if ( (in_file = fopen(pSrc, "rb")) == NULL )
    {
        perror(pSrc);
        return -2;
    }
    if ( (out_file = fopen(pDes, "wb")) == NULL )
    {
        perror(pDes);
        return -3;
    }
    while ( (bytes_in = fread(data, 1, BUF_SIZE, in_file)) > 0 )
    {
        bytes_out = fwrite(data, 1, bytes_in, out_file);
        if ( bytes_in != bytes_out )
        {
            perror("Fatal write error.\n");
            return -4;
        }
        len += bytes_out;
        printf("copying file .... %d bytes copy\n", len);
    }
    fclose(in_file);
    fclose(out_file);
    return 1;
}

int copyDir(const char * pSrc,const char *pDes)
{
    if (NULL == pSrc || NULL == pDes)	return -1;
    mkdir(pDes);
    char dir[MAX_PATH] = {0};
    char srcFileName[MAX_PATH] = {0};
    char desFileName[MAX_PATH] = {0};
    char *str = "\\*.*";
    strcpy(dir,pSrc);
    strcat(dir,str);
    //首先查找dir中符合要求的文件
    long hFile;
    _finddata_t fileinfo;
    if ((hFile = _findfirst(dir,&fileinfo)) != -1)
    {
        do
        {
            strcpy(srcFileName,pSrc);
            strcat(srcFileName,"\\");
            strcat(srcFileName,fileinfo.name);
            strcpy(desFileName,pDes);
            strcat(desFileName,"\\");
            strcat(desFileName,fileinfo.name);
            //检查是不是目录
            //如果不是目录,则进行处理文件夹下面的文件
            if (!(fileinfo.attrib & _A_SUBDIR))
            {
                copyFile(srcFileName,desFileName);
            }
            else//处理目录，递归调用
            {
                if ( strcmp(fileinfo.name, "." ) != 0 && strcmp(fileinfo.name, ".." ) != 0 )
                {
                    copyDir(srcFileName,desFileName);
                }
            }
        } while (_findnext(hFile,&fileinfo) == 0);
        _findclose(hFile);
        return 1;
    }
    return -3;
}
int main(int argc, char* argv[])
{
    std::cout << "please wait ...";
copyDir("E:\\DirA","E:\\DirB");     
    std::cout << "ok";
    return 0;
}