考虑代码:#include#include#includeclassCFileOperationWatcher{public:CFileOperationWatcher(){}virtualvoidonProgressChanged(uint64_tsizeProcessed,uint64_ttotalSize,size_tnumFilesProcessed,size_ttotalNumFiles,uint64_tcurrentFileSizeProcessed,uint64_tcurrentFileSize){}virtual~CFileOperationWatcher(){}voi