機(jī)械式(轉(zhuǎn)輪)(完整版)
【正文】 ues ? Overflow – happens when a number is too big to be represented ? Truncation – happens when a number is between two representable numbers Figure The sound wave represented by the sequence 0, , , , , , , , 0 Figure The base ten and binary systems Figure Decoding the binary representation 100101 Figure An algorithm for finding the binary representation of a positive integer Figure Applying the algorithm in Figure to obtain the binary representation of thirteen Figure The binary addition facts Figure Decoding the binary representation Representing Integers ? Unsigned integers can be represented in base two ? Signed integers = numbers that can be positive or negative ? Two’ s plement notation = the most popular representation ? Excess notation = another less popular representation Figure Two’ s plement notation systems Figure Coding the value 6 in two’ s plement notation using four bits Figure Addition problems converted to two’ s plement notation Figure An excess eight conversion table Figure An excess notation system using bit patterns of length three Figure Floatingpoint notation ponents Figure Coding the value 25?8 Figure The ASCII codes for the letters A and F adjusted for odd parity Figure An errorcorrecting code Figure Decoding the pattern 010100 using the code in Figure 謝謝觀看 /歡迎下載 BY FAITH I MEAN A VISION OF GOOD ONE CHERISHES AND THE ENTHUSIASM THAT PUSHES ONE TO SEEK ITS FULFILLMENT REGARDLESS OF OBSTACLES. BY FAITH I BY FAITH 。 ? 1886美國何樂里設(shè)計(jì)出以打孔卡片來儲(chǔ)存資料的計(jì)算機(jī)器 ? 1906美國費(fèi)樂斯 (Forest)發(fā)明了 真空管 電腦之父 —巴貝奇(babbage) 巴貝奇的差分機(jī) 范紐曼 (Von Neumann) 電腦的演進(jìn) ? 1939美國愛荷華州立大學(xué)製造出第一部電腦 ABC ? 1946美國賓州大學(xué)和軍方合作製造出 ENIAC電腦，范紐曼 提出內(nèi)儲(chǔ)程式的觀念，被譽(yù)為「電子電腦之父」 ? 1947美國貝爾實(shí)驗(yàn)室發(fā)明了電晶體 ? 1949英國劍橋大學(xué)完成第一部大型內(nèi)儲(chǔ)程式電腦EDSAC ? 1951美國 Sperry Rand公司生產(chǎn) UNIVAC1，第一部大量製造的商業(yè)電腦 電腦的演進(jìn) (cont.) ? 1954美國貝爾實(shí)驗(yàn)室製出第一臺(tái)以電晶體為主要元件的電腦 (TRADIC) ? 1958美國德州儀器公司發(fā)明了積體電路 (IC Integrated Circuit ? 1964美國國際商業(yè)機(jī)器公司 (IBM)用 IC為主元件開發(fā)出 System360電腦 ? 1970開始有電腦使用超大型積體電腦
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