【正文】 數(shù)據(jù)丟失時(shí)供其下載。關(guān)鍵詞：系統(tǒng)容災(zāi)；網(wǎng)絡(luò)同步；備份；C++AbstractFor important system，disaster backup has an irreplaceable practical work,we can often heard some panies because of the loss of data and result in an immeasurable loss,cause the whole system paralysis. However do data backup’s panies in China started late and its products are not mature,so mainly overseas pany accout for a large market share in this aspect,and the price is very expensive,so that small bank system in our country,the work system of large panies,small businesses have few relatively plete disaster backup system,in the event of data present there are many data backup solutions,notably the different disaster recover system based on backup system is realized by using this method has a high data security,system running maintenance overhead has vast market prospect.Network synchronization backup system,it based on C/S model,With the end of the service maintenance cost is system consists of two parts, the client and the server, using C++ development language, its stability is more server to plete the user registration and login, at the same time send a local file to the remote server for backup .Serverside validation of user login, when the end of service data loss for biggest advantage of this system lies in the work synchronization, without human intervention, automatic scanning local file and plete the data synchronization backup.Keyword： System Disastertolerant；Network Synchronization；Backup；C++目 錄摘 要 ..............................................................................................................................................IIIABSTRACT .......................................................................................................................................IV目 錄 .............................................................................................................................................V1 緒論 ..............................................................................................................................................1 課題研究的背景 ...........................................................................................................................1 國(guó)內(nèi)外現(xiàn)狀 ..................................................................................................................................1 課題研究的意義 ...........................................................................................................................2 論文結(jié)構(gòu) .......................................................................................................................................22 系統(tǒng)設(shè)計(jì)分析 ...............................................................................................................................4 可行性分析 ...................................................................................................................................4 技術(shù)可行性 ...........................................................................................................................4 經(jīng)濟(jì)可能性 ...........................................................................................................................4 操作可能性 ...........................................................................................................................4 開(kāi)發(fā)工具 .......................................................................................................................................4 Visual Studio 2022 程序開(kāi)發(fā)平臺(tái) .........................................................................................4 C++程序設(shè)計(jì)語(yǔ)言 ..................................................................................................................43 系統(tǒng)需求分析 ...............................................................................................................................5 需求分析 .......................................................................................................................................5 數(shù)據(jù)需求分析 ...............................................................................................................................5 數(shù)據(jù)流圖 .......................................................................................................................................64 系統(tǒng)功能界面與實(shí)現(xiàn) ...................................................................................................................7 服務(wù)端 ...........................................................................................................................................7 服務(wù)器端界面介紹 ................................................................................................................7 服務(wù)器端功能實(shí)現(xiàn) ...............................................................................................................7 服務(wù)器端添加用戶 ..................................................................................................................8 服務(wù)器端驗(yàn)證用戶 ..................................................................................................................9 服務(wù)器端與客戶端同步文件 ..................................................................................................9 服務(wù)器數(shù)據(jù)庫(kù) .....................................................................................................................11 客戶端 .........................................................................................................................................11 客戶端界面介紹 ...................................