【導(dǎo)讀】隨著電子計算機(jī)和通信技術(shù)的發(fā)展，人類已經(jīng)逐漸地進(jìn)入信息化社會。源一樣成為一種社會的基本生產(chǎn)資料，在人類的社會生產(chǎn)活動中發(fā)揮著重要的作用。所面臨的問題，對內(nèi)來看，可以提高工作效率；對外來看，獲得競爭優(yōu)勢。管理信息系統(tǒng)的開發(fā)方法有生命周期法、原型法和面向?qū)ο蟮拈_發(fā)方法等。對系統(tǒng)的修改和重建的開始；原型法是20世紀(jì)80年代發(fā)展起來的，旨在改變生命周期法的缺點(diǎn)的一種系統(tǒng)開發(fā)方法，該法的開發(fā)思路是首先根據(jù)用戶的要求，基于以上三種方法的特點(diǎn)和各自的優(yōu)缺點(diǎn)，本圖書館管理系統(tǒng)利用軟件工程化思想。型法和面對對象的方法。省時間、降低成本。立和維護(hù)以及前端應(yīng)用程序的開發(fā)兩個方面。對于前者要求建立起數(shù)據(jù)一致性和完整性強(qiáng)、而對于后者則要求應(yīng)用程序功能完備,易使用等特點(diǎn)。對會員管理、會員查詢、社團(tuán)查詢、會費(fèi)查詢四個方面。由于系統(tǒng)數(shù)據(jù)的組成對存儲安全性要求較高，因此系統(tǒng)的。開發(fā)工具的選擇....

　　

【正文】 eet. 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。s two children, children no more. They were gone forever. Billy was guided by dread and the lack of dread. Dread told him when to stop. Lack of it told him when to move again. He stopped. He went into his daughter39。s room. Her drawers were dumped. her closet was empty. Heaped in the middle of the room were all the possessions she could not take on a honeymoon. She had a Princess telephone extension all her ownon her windowsill Its tiny night light stared at Billy. And then it rang. Billy answered. There was a drunk on the other end. Bi 39。Who killed me? he would ask. And everybody knew the answer., which was this: Billy Pilgrim.39。 Listen on the tenth night the peg was pulled out of the hasp on Billy39。s boxcar door, and the door was opened. Billy Pilgrim was lying at an angle on the cornerbrace, selfcrucified, holding himself there with a blue and ivory claw hooked over the sill of the ventilator. Billy coughed when the door was opened, and when he coughed he shit thin gruel. This was in accordance with the Third Law of Motion according to Sir Isaac Newton. This law tells us that for every action there is a reaction which is equal and opposite in direction. This can be useful in rocketry. The train had arrived on a siding by a prison which was originally constructed as an extermination camp for Russian prisoners of war. The guards peeked inside Billy39。s car owlishly, cooed calmingly. They had never dealt w ith Americans before, but they surely understood this general sort of freight. They knew that it was essentially a liquid which could be induced to flow slowly toward cooing and light. It was nighttime. The only light outside came from a single bulb which hung from a polehigh and far away. All was quiet outside, except for the guards, who cooed like doves. And the liquid began to flow. Gobs of it built up in the doorway, plopped to the ground. Billy was the nexttolast human being to reach the door. The hobo was the last. The hobo could not flow, could not plop. He wasn39。t liquid any more. He was stone. So it goes. Billy didn39。t. want to drop from the car to the ground. He sincerely believed that he would shatter like glass. So the guards helped him down, cooing still. T hey set him down facing the train. I t was such a dinky train now. There was a lootive, a tender, and three little boxcars. The last boxcar was the railroad guards39。 heaven on wheels. Againin that heaven on wheelsthe table was set. Dinner was served. At the base of the pole from which the light bulb hung were three seeming haystacks. The Americans were wheedled and teased over to those three stacks, w hich we ren39。t hay after all. They were overcoats taken from prisoners who were dead. So it goes. It was the guards39。 firmly expressed wish that every American without an overcoat should take one. The coats were cemented together with ice, so the guards used t heir bayos as ice picks, pric king free collars and hems and sleeves and so on, then peeling off coats and handing them out at random. The coats were stiff and domeshaped, having conformed to their piles. The coat that Billy Pilgrim got had been crumpled and frozen in such a way, and was so small, that it appeared to be not a coat but a sort of large black, threecornered hat. There were gummy stains on it, too, like crankcase drainings or old strawberry jam. There seemed to be a dead, furry animal frozen to it. The animal was in fact the coat39。s fur collar. Billy glanced dully at the coats of his neighbors. T heir coats all had brass buttons or tinsel or piping or numbers or stripes or eagles or moons or stars dangling from them. They were soldiers39。 coats. Billy was the only one who had a coat from a dead civilian. So it goes. And Billy and the rest were encouraged to shuffle around their dinky train and into the prison camp. There wasn39。t anything warm or lively to attract them merely long, low, narrow sheds by the thousands, with no lights inside. Somewhere a dog barked. With the help of fear and echoes and winter silences, that dog had a voice like a big bronze gong. Billy and the rest were wooed through gate after gate, and Billy saw his first Russian. The man was all alone in the nighta ragbag with a round, flat face that glowed like a radium dial. Billy passed w ithin a yard of him. There was barbed wire between them. The Russian did not wave or speak, but he looked directly into Billy39。s soul with sweet hopefulness, as though Billy might have good news for himnews he might be too stupid to understand, but good news all the same. Billy blac ked out as he walked through gate after gate. He came to what he thought might be a building on Tralfamadore. It wa s shrilly lit and lined with white tiles. It was on Earth, though. It was a delousing station through which all new prisoners had to pass. Billy did as he was told, took off his clothes. That was the first thing they told him to do on Tralfamadore, too. A German measured Billy39。s upper right arm with his thumb and forefinger, asked a panion what sort of an army would send a weakling like that to the front. They looked at the other American bodies now, pointed out a lot more that were nearly as bad as Billy39。s. One of the best bodies belonged to the oldest American by far, a high school teacher from Indianapolis. H is name was Edgar Derby. He hadn39。t been in Billy39。s boxcar. He39。d been in Roland Weary39。s car, had cradled Weary39。s head while he died. So it goes. Derby was forty four year