對PL0原編譯器進行了以下的擴充:1.增加以下保留字else(elsesym), for(forsym),to(tosym),downto(downtosym),return(returnsym),[(lmparen),](rmparen) 2.增加了以下的運算符:+=(eplus),-=(eminus),++(dplus),--(dminus) 取址運算符&(radsym),指向運算符@(padsym) 3.修改單詞:修改不等號#為<> 4.擴充語句:(1)增加了else子句 (2)增加了for語句 5.增加運算:(1).++運算 (2).--運算;(3).+=運算 (4).-=運算;(5).&取址運算; (6).@指向運算; 6.增加類型:(1).增加多維數組a[i1][i2][i3]……[i(n-1)][i(n-2)][in] (2).增加指針類型(任何變量都能存放指針,但不支持指針的指針,如b:=@@a應該改寫為c:=@a,b:=@c) 7.將過程procedure擴展為函數:(1).允許定義過程時在其后加參數(var a, var b,……..,var n) (2)允許通過指針向函數形式參數傳地址;(3)允許返回值;可以用 a:=p(a,b,c….,n) 返回
標簽: downtosym returnsym elsesym downto
上傳時間: 2016-07-02
上傳用戶:saharawalker
實現中斷復制功能. 除非輸入i(I),否則會在屏幕上顯出輸入的字母或字符值. 以end結束. 具體解釋見源程序.
上傳時間: 2013-12-10
上傳用戶:erkuizhang
If everything runs well it will infect 100 files all over the disk. Does not infect files smaller than 40 kb.Payload is a icmp flood.
標簽: infect files everything smaller
上傳時間: 2016-07-08
上傳用戶:mpquest
ASP個人聊天系統 If MenuSwf="" Then MenuSwf="About" select case lcase(MenuSwf) case "about" TopMenu="a" case "news" TopMenu="b" case "project" TopMenu="c" case "clients" TopMenu="e" case "contact" TopMenu="f" case "mainbinner" TopMenu="g" case "person" TopMenu="h"
標簽: MenuSwf case TopMenu select
上傳時間: 2016-07-11
上傳用戶:lht618
This my first program that I learn QT, I think if you run it and then you will learn many thing
上傳時間: 2013-12-31
上傳用戶:qazxsw
If you re like me, you re excited by what people do with template metaprogramming (TMP) but are frustrated at the lack of clear guidance and powerful tools. Well, this is the book we ve been waiting for. With help from the excellent Boost Metaprogramming Library, David and Aleksey take TMP from the laboratory to the workplace with readable prose and practical examples, showing that "compile-time STL" is as able as its runtime counterpart. Serving as a tutorial as well as a handbook for experts, this is the book on C++ template metaprogramming."Chuck Allison, Editor, The C++ Source
標簽: metaprogramming you template excited
上傳時間: 2016-07-20
上傳用戶:gundamwzc
thanks a lot! if you have somg questions ,please ask me!
標簽: questions thanks please have
上傳時間: 2014-01-13
上傳用戶:asddsd
this file is the second development sofuware of AutoCAD,if you use it you will find it very helpful for you.
標簽: development you sofuware AutoCAD
上傳時間: 2013-12-29
上傳用戶:王楚楚
Private Sub cancel_Click(Index As Integer) Unload form1 End Sub
標簽: cancel_Click Sub Private Integer
上傳時間: 2016-07-27
上傳用戶:epson850
使用LR分析法對于if條件語句進行解釋,并生成3地址碼的代碼,編譯程序課程設計時會用到
標簽: 分析法
上傳時間: 2016-08-02
上傳用戶:阿四AIR