【正文】 s partners in the New Holiday Inn. There was a full moon. Billy got out of bed in the moonlight. He felt spooky and luminous felt as though he were wrapped in cool fur that was full of static electricity. He looked down at his bare feet. They were ivory and blue. Billy now shuffled down his upstairs hallway, knowing he was about to be kidnapped by a flying saucer. The hallway was zebra striped with darkness and moonlight. The moonlight came into the hallway through doorways of the empty rooms of Billy39。 參考資料 《管理信息系統(tǒng)導(dǎo)論》 黃梯云 機(jī)械工業(yè)出版社 《 管理信息系統(tǒng)》 黃梯云 經(jīng)濟(jì)科學(xué)出版社 《計(jì)算機(jī)應(yīng)用基礎(chǔ)教程》 周澄華、楊洪 中國經(jīng)濟(jì)出版社 《信息系統(tǒng)開發(fā)》 甘仞初 經(jīng)濟(jì)科學(xué)出版社 《數(shù)據(jù)組織與結(jié)構(gòu)》 王珊 經(jīng)濟(jì)科學(xué)出版社 《軟件開發(fā)工具》 方美琪 經(jīng)濟(jì)科學(xué)出版社 This boothwn outside, each car became a single anism which ate and drank and excreted through its ventilators. It talked or sometimes yelled through its ventilators, too. In went water and loaves of blackbread and sausage and cheese, and out came shit and piss and language. Human beings in there were excreting into steel helmets, which were passed to the people at the ventilators, who dumped them. Billy was a dumper. The human beings also passed canteens, which guards would fill with water. When food came in, the human beings were quiet and trusting and beautiful. They shared. Human beings in there took turns standing or lying down. The legs of those who stood were like fence posts driven into a warm., squirming, fatting, sighing earth. The queer earth was a mosaic of sleepers who nestled like spoons. Now the train began to creep eastward. Somewhere in there was Christmas. Billy Pilgrim nestled like a spoon with the hobo on Christmas night, and he fell asleep, and he traveled in time to 1967 againto the night he was kidnapped by a flying saucer from Tralfamadore. Four Billy Pilgrim could not sleep on his daughters wedding night. He was forty four. The wedding had taken place that afternoon in a gaily striped tent in Billy39。你們的嚴(yán)格把關(guān)，對我們來說有很大的壓力。 數(shù)據(jù)庫訪問速度慢，隨著數(shù)據(jù)量的增加，采用 ACCESS 作為數(shù)據(jù)庫將不能滿足需求。為以后的工作、學(xué)習(xí)的進(jìn)一步提高打下了堅(jiān)實(shí)的基礎(chǔ)。 這次的畢業(yè)設(shè)計(jì)開發(fā)，主要有以下幾點(diǎn)收獲： 開發(fā)方法有了一定的了解。 本系統(tǒng)的維護(hù)模塊 ? 密碼更改 密碼更改界面 數(shù)據(jù)導(dǎo)出 數(shù)據(jù)導(dǎo)出 第六章 開發(fā)總結(jié) 在本系統(tǒng)的開發(fā)過程中，由于本人是初次開發(fā)軟件，在知識、經(jīng)驗(yàn)方面都存在著不足。 系統(tǒng)維護(hù)的內(nèi)容 按照維護(hù)對象的不同，系統(tǒng)維護(hù)的內(nèi)容可分為以下幾類： （ 1）系統(tǒng)應(yīng)用程序維護(hù) （ 2）數(shù)據(jù)維護(hù) （ 3）代碼維護(hù) （ 4）硬件設(shè)備維護(hù) 系統(tǒng)維護(hù)的類型 系統(tǒng) 維護(hù)的重點(diǎn)是系統(tǒng)應(yīng)用軟件的維護(hù)工作，按照軟件維護(hù)的不同性質(zhì)，可以劃分為下面四種類型： （ 1）糾錯(cuò)性維護(hù) 診斷和修正系統(tǒng)中遺留的錯(cuò)誤。 硬盤： 以上 打印機(jī)：推薦 EPSON LQ1600KII 軟件配置要求： WINDOWS95/98/2020/XP 中文版操作系統(tǒng)。 3 miCount amp。 amp。獲取基礎(chǔ)信息 Public Function GetFromINI(AppName As String, KeyName As String, FileName As String) As String Dim RetStr As String RetStr = String(255, Chr(0)) GetFromINI = Left(RetStr, GetPrivateProfileString(AppName, ByVal KeyName, , RetStr, Len(RetStr), FileName)) End Function 39。Persist Security Info=True 39。Data Source= amp。顯示 splash 窗口 = 電子教務(wù)系統(tǒng) If Len(GetFromINI(注冊信息 , 學(xué)校名稱 , + \電子教務(wù)系統(tǒng) .ini)) = 0 Then vbModal, Splash ReleaseResource End Else = 電子教務(wù)系統(tǒng) 39。 39。 \電子教務(wù)系統(tǒng) .ini Open sF For Output As 1 Print 1, [注冊信息 ] Close 1 End If 39。 Public LoginUser As String Public Permission As String Public Con As Public Declare Function GetDesktopWindow Lib user32 () As Long Public Declare Function ShellExecute Lib Alias ShellExecuteA (ByVal hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long Public Declare Function GetAsyncKeyState Lib user32 (ByVal vkey As Long) As Integer Public Declare Function WritePrivateProfileString Lib Kernel32 Alias WritePrivateProfileStringA (ByVal lpApplicationName As String, ByVal lpKeyName As Any, ByVal lpString As Any, ByVal lplFileName As String) As Long Public Declare Function GetPrivateProfileString Lib Kernel32 Alias GetPrivateProfileStringA (ByVal lpApplicationName As String, lpKeyName As Any, ByVal lpDefault As String, ByVal lpRetunedString As String, ByVal nSize As Long, ByVal lpFileName As String) As Long 39。這樣的應(yīng)用程序在 32位操作系統(tǒng)下運(yùn)行，速度更快，更安全，并且更適合在多任務(wù)環(huán)境下運(yùn)行。 Visual Basic 提供開放式數(shù)據(jù)連接（ Open DataBase Connectivity），即 ODBC 功能，它可通過直接訪問或建立連接的方式使用并操作后臺大型網(wǎng)絡(luò)數(shù)據(jù)庫，如 SQL Server、Oracle等。這樣可以方便編程人員、提高效率。 3． 件驅(qū)動編程機(jī)制 Visual Basic 通過事件來執(zhí)行對象的操作。 Visual Basic自動產(chǎn)生界面設(shè)計(jì)代碼，程序設(shè)計(jì)人員只需要編寫實(shí)現(xiàn)程序功能的那部分代碼，從而可以大大提高程序設(shè)計(jì)的效率。 開發(fā)工具的選擇 Visual Basic 是一種可視化、面向?qū)ο蠛筒捎檬录?qū)動方式的結(jié)構(gòu)化高級程序設(shè)計(jì)語言，可用于開發(fā) Windows 環(huán)境下的各類應(yīng)用程序。 當(dāng)通過菜單選擇了所要進(jìn)行的工作以后，系統(tǒng)進(jìn)入相應(yīng)的業(yè)務(wù)處理功能，這時(shí)業(yè)務(wù)處理活動在屏幕中間區(qū)域即工作區(qū)進(jìn)行。因此，簡潔、實(shí)用、友好是設(shè)計(jì)時(shí)應(yīng)當(dāng)考慮到的風(fēng)格。 （ 4）數(shù)據(jù) 庫后備與恢復(fù) 主要使用轉(zhuǎn)儲、日志等方法進(jìn)行數(shù)據(jù)庫的恢復(fù)。 （ 2）數(shù)據(jù)完整性 為了保證數(shù)據(jù)庫數(shù)據(jù)的正確性 和相容性，數(shù)據(jù)庫管理系統(tǒng)（ DBMS）都提供了一種機(jī)制來檢查數(shù)據(jù)庫中的數(shù)據(jù)，看它是否滿足語義的規(guī)定條件， DBMS 稱這種機(jī)制為“數(shù)據(jù)完整性檢查”。 （ 1）數(shù)據(jù)庫的安全性 數(shù)據(jù)庫的安全性是指保護(hù)數(shù)據(jù)庫以防止不合法的使用所造成的數(shù)據(jù)泄露、更改或破壞。 （ 3） 數(shù)據(jù)結(jié)構(gòu)具有相對的穩(wěn)定性。E—— R 圖由實(shí)體、屬性、聯(lián)系三部分組成。 一、通過對系統(tǒng)的調(diào)查和可行性分析，畫出系統(tǒng)的數(shù)據(jù)流程圖： 基礎(chǔ)數(shù)據(jù) 學(xué)生信息報(bào)表 教工信息報(bào)表 學(xué)生信息 成績信息 成績分析信息 教工信息 頂圖數(shù)據(jù)流圖 基礎(chǔ)數(shù)據(jù) 年級表 班級表 部門表