[C++知识库]加载文件夹下所有文件

windows 加载文件夹下所有文件 / 加载文件夹下所有图片 

GetImageFileNamesFromFolder

void GetImageFileNamesFromFolder(const char *folder, vector<string> &vImageFileNames)
{
	vImageFileNames.clear();

	string folder_str(folder);
	_finddata_t file;
	long lf;

	if (folder_str.empty())
	{
		cout << "unable get the source file name." << endl;
		return;
	}

	if (folder_str[folder_str.length() - 1] != '\\') //for windows
	{
		folder_str += "\\";
	}
	string fileFind = folder_str + "*.*";

	if ((lf = _findfirst(fileFind.c_str(), &file)) == -1)
	{
		printf("Found no files in image folder ...\n");
		return;
	}
	else
	{
		while (_findnext(lf, &file) == 0)
		{
			string tempFileName(file.name);
			string suffix = tempFileName.substr(tempFileName.rfind(".") + 1, tempFileName.length());

			if (suffix == "jpg" || suffix == "JPG" || suffix 

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