一個能夠分析三種整數、標識符、主要運算符和主要關鍵字的詞法分析程序。 ㈠、基本要求: 標識符 <字母>(<字母>|<數字字符>)* 十進制整數 0 | (1|2|3|4|5|6|7|8|9)(0|1|2|3|4|5|6|7|8|9)* 八進制整數 0(1|2|3|4|5|6|7)(0|1|2|3|4|5|6|7)* 十六進制整數 0x(0|1|2|3|4|5|6|7|8|9|a|b|c|d|e|f)(0|1|2|3|4|5|6|7|8|9|a|b|c|d|e|f)* 運算符和分隔符 + - * / > < = ( ) ; 關鍵字 if then else while do ㈡、附加要求: 標識符 <字母>(<字母>|<數字字符>)*(ε|_|.)(<字母>|<數字字符>)* 十進制整數 (0|1|2|3|4|5|6|7|8|9)(0|1|2|3|4|5|6|7|8|9)*(ε|.)(0|1|2|3|4|5|6|7|8|9)(0|1|2|3|4|5|6|7|8|9)* 八進制整數 0(1|2|3|4|5|6|7)(0|1|2|3|4|5|6|7)* (ε|.)(0|1|2|3|4|5|6|7)(0|1|2|3|4|5|6|7)* 十六進制整數 0x(0|1|2|3|4|5|6|7|8|9|a|b|c|d|e|f)(0|1|2|3|4|5|6|7|8|9|a|b|c|d|e|f)* (ε|.) (0|1|2|3|4|5|6|7|8|9|a|b|c|d|e|f)(0|1|2|3|4|5|6|7|8|9|a|b|c|d|e|f)*
上傳時間: 2016-03-03
上傳用戶:zhengjian
本系統以高效率D類功率放大器為核心,輸出開關管以采用高速MOSFET管,連接成互補對稱H橋式結構。
上傳時間: 2013-12-18
上傳用戶:trepb001
數字直流穩壓器: 用單片機來設置輸出電壓,把單片機設置的數值通過D\A數模轉換變換為模擬電壓,然后通過輸出的模擬電壓,控制穩壓模塊的輸出,穩壓模塊由可調穩壓塊LM317和雙運算放大器LM358構成,通過LM358比較輸出和設置電壓并控制LM317的輸出,以達到比較精確的輸出,用三位數碼管動態顯示輸出電壓值,精確到0.1V。
上傳時間: 2013-12-18
上傳用戶:wxhwjf
第一部分 VISUAL C++實驗環境介紹 ..........................................3 一、Visual C++簡介 3 二、項目開發過程 4 三、集成開發環境Developer Studio 4 四、常用功能鍵及其意義 7 第二部分 實驗 8 實驗一 熟悉實驗環境 8 實驗二 簡單程序開發 15 實驗三 函數與程序結構 18 實驗四 結構和類 21錯誤!未定義書簽。 實驗五 繼承與虛函數 28 實驗六 重載與文件I/O 33 實驗七 面向對象程序設計(1) 35 實驗八 面向對象程序設計(2) 47
上傳時間: 2016-03-16
上傳用戶:songyue1991
The PCI Local bus concept was developed to break the PC data I/O bottleneck and clearly opens the door to increasing system speed and expansion capabilities. The PCI Local bus moves high speed peripherals from the I/O bus and places them closer to the system’s processor bus, providing faster data transfers between the processor and peripherals. The PCI Local bus also addresses the industry’s need for a bus standard which is not directly dependent on the speed, size and type of system processor. It represents the first microprocessor independent bus offering performance more than adequate for the most demanding applications such as full-motion video.
標簽: bottleneck developed the concept
上傳時間: 2014-12-03
上傳用戶:ikemada
The PCI Local bus concept was developed to break the PC data I/O bottleneck and clearly opens the door to increasing system speed and expansion capabilities. The PCI Local bus moves high speed peripherals from the I/O bus and places them closer to the system’s processor bus, providing faster data transfers between the processor and peripherals. The PCI Local bus also addresses the industry’s need for a bus standard which is not directly dependent on the speed, size and type of system processor. It represents the first microprocessor independent bus offering performance more than adequate for the most demanding applications such as full-motion video. Hardware reference
標簽: bottleneck developed the concept
上傳時間: 2016-03-18
上傳用戶:極客
The PCI Local bus concept was developed to break the PC data I/O bottleneck and clearly opens the door to increasing system speed and expansion capabilities. The PCI Local bus moves high speed peripherals from the I/O bus and places them closer to the system’s processor bus, providing faster data transfers between the processor and peripherals. The PCI Local bus also addresses the industry’s need for a bus standard which is not directly dependent on the speed, size and type of system processor. It represents the first microprocessor independent bus offering performance more than adequate for the most demanding applications such as full-motion video. User Manual
標簽: bottleneck developed the concept
上傳時間: 2014-01-15
上傳用戶:努力努力再努力
(1)用微機原理實驗箱FD-8088提供的數碼管和芯片做。 (2)假設有一個十字路口,1,3為南北方向,2,4為東西方向,每個路口各有紅、黃、綠三個交通信號燈。 (3)用紅黃綠三個彩色發光二極管模擬控制交通信號。紅、黃、綠燈接通時間分別為5秒、2秒、5秒。
上傳時間: 2014-01-12
上傳用戶:xlcky
ADC0809是帶有8位A/D轉換器、8路多路開關以及微處理機兼容的控制邏輯的CMOS組件。它是逐次逼近式A/D轉換器,可以和單片機直接接口,從ADC0809的通道IN3輸入0-5V之間的模擬量,通過ADC0809轉換成數字量在數碼管上以十進制形成顯示出來。ADC0809的VREF接+5V電壓
上傳時間: 2016-03-29
上傳用戶:asasasas
(五)測試數據:n=0 n=-1 n=2 a 1 2 a 2 3 a 3 4 d 3 5 n=2 a 1 5 a 2 10 d 1 15 a 3 20 a 4 25 a 5 30 d 2 35 d 4 40 e 0 0 (六)測試結果:error error 沒付錢,沒停就走了 第一輛車付50元 第二輛車付125元 第三輛車沒出來 第四輛車付25元 第五輛車沒進入
上傳時間: 2014-02-08
上傳用戶:wfeel