C++获取文件夹所有文件，并rename重命名

#include
#include
#include
#include
using namespace std;

int  main()
{
	string newname = "C:\\Users\\LYH\\Desktop\\rename\\rename\\test\\image_disciple_";
	int num = 1099;

	_finddata_t file;
	long lf;
	if((lf = _findfirst("C:\\Users\\LYH\\Desktop\\rename\\rename\\test\\*.*", &file))==-1l)//_findfirst返回的是long型; long __cdecl _findfirst(const char *, struct _finddata_t *)
		cout<<"文件没有找到!\n";
	else
	{
		//_findnext( lf, &file );
		cout<<"\n文件列表:\n";
		while( _findnext( lf, &file ) == 0 )//int __cdecl _findnext(long, struct _finddata_t *);如果找到下个文件的名字成功的话就返回0,否则返回-1
		{
			char cnum[5] = "";
			cout<