vc++遍历文件

应包含的头文件：

#include <io.h>

1. 遍历文件夹下的文件（不包括子文件夹）例如查找全部jpg图片，fileName为 [folderPath]\\*.jpg

        int fileCount=0;
	_finddata_t fileInfo;
	long handle = _findfirst(fileName, &fileInfo);

	if (handle == -1L)
	{
		cerr << "failed to transfer files" << endl;
		return false;
	}
	do 
	{
		fileCount++;
	}while (_findnext(handle, &fileInfo) == 0);

	cout<<"================================================"<<endl;
	cout<<"there are "<<fileCount<<" images in "<<fpath<<endl;
	cout<<"================================================"<<endl;

2. 遍历包括子文件夹的文件，fileType为类似于“.jpg”，如果要查找全部文件则fileType为空或者“*”

void findFileInFolder(string folderPath,string fileType)
{
	_finddata_t FileInfo;
	string strfind = folderPath + "\\*" + fileType;
	long Handle = _findfirst(strfind.c_str(), &FileInfo);

	if (Handle == -1L)
	{
		cerr << "can not match the folder path" << endl;
		exit(-1);
	}
	do{
		//判断是否为子目录
		if (FileInfo.attrib & _A_SUBDIR)    
		{
			//忽略当前和父文件夹（"." 和 ".."）
			if( (strcmp(FileInfo.name,".") != 0 ) &&(strcmp(FileInfo.name,"..") != 0))   
			{
				string newPath = folderPath + "\\" + FileInfo.name;
				findFileInFolder(newPath,fileType);
			}
		}
		else  
		{
			cout << folderPath << "\\" << FileInfo.name  << "\n";
		}
	}while (_findnext(Handle, &FileInfo) == 0);

	_findclose(Handle);
}