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重慶理工會(huì)計(jì)信息化課程課件ppt雙語(yǔ)之第3-2章編程基礎(chǔ)與常用控件技術(shù)(已修改)

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【正文】 Accounting Information ? 熟悉逐步熟悉 PowerScript的基礎(chǔ)語(yǔ)法及語(yǔ)句 (Are familiar with the foundation to gradually familiar with the PowerScript syntax and statement) ? 掌握常見(jiàn)的窗口控件 ( Grasp the mon window control ) 學(xué)習(xí)目的與要求 Learning Objectives and Requirements 32 編程基礎(chǔ)與常用控件技術(shù) Programming with the Common Control Technology 教學(xué)內(nèi)容 (Teaching content) 32 編程基礎(chǔ)與常用控件技術(shù) Programming with the Common Control Technology 對(duì)象編程基礎(chǔ) (Objectbased programming) PowerScript語(yǔ)言 (PowerScript Language ) 窗口控件 (Window Control ) 常用函數(shù) (Common Functions ) 對(duì)象菜單 (Object Menu ) 對(duì)象編程基礎(chǔ) objectoriented programmingbased 腳本也稱為事件處理程序,是指動(dòng)作發(fā)生時(shí)相應(yīng)執(zhí)行的一段程序The script is also known as the event handler refers to the action occurs, the corresponding period of the implementation of procedures for. 指作用在對(duì)象上的動(dòng)作,當(dāng)事件觸發(fā)時(shí),執(zhí)行腳本。 Event refers to the role of the object movements, when the event is triggered, the implementation of the script. 對(duì)象 事件 腳本 表示單一的實(shí)體 (如窗口、按鈕等) 名字 屬性 方法 事件 ( Event) 函數(shù) ( Fuction) Object represents a single entity (such as windows, buttons, etc.) 對(duì)象編程基礎(chǔ) objectoriented programmingbased 例:按鈕對(duì)象 正文 寬度 高度 教學(xué)內(nèi)容 32 編程基礎(chǔ)與常用控件技術(shù) 對(duì)象編程基礎(chǔ) PowerScript語(yǔ)言 窗口控件 常用函數(shù) 對(duì)象菜單 PowerScript語(yǔ)言 注釋( //):行注釋和塊注釋 標(biāo)識(shí)符 大小寫(xiě) 命令結(jié)束符(回車(chē)鍵) 行繼續(xù)符( amp。) 空值( null) 保留字 操作符 算術(shù)運(yùn)算符、關(guān)系運(yùn)算符、邏輯運(yùn)算符、字符串的連接 保留字供PowerBuilder內(nèi)部使用 語(yǔ)言基礎(chǔ) PowerScript語(yǔ)言 數(shù)據(jù)類(lèi)型、變量和常量 Data types, variables and constants ( 1)標(biāo)準(zhǔn)數(shù)據(jù)類(lèi)型 Standard data types integer或 int(整型),整數(shù)的取值范圍是從 32768到 32767 (integer or int (integer), integer values range from 32768 to 32767 ) boolean(布爾型),布爾變量有兩個(gè)值: true和false,分別表示真和假 (boolean (boolean type), Boolean variables are two values: true and false, true and false, respectively ) real(實(shí)型 ),實(shí)型變量被創(chuàng)建時(shí)的初始值是 0 (real (solid type), real variables are created when the initial value is 0 ) char或 character(字符型),該類(lèi)型變量用于存儲(chǔ)一個(gè) ASCII字符。 (char or character (character), the type of variable is used to store an ASCII character. ) date(日期型) ,日期包含年、月、日,年月日之間用連接符( )連接。 (date (date type), the date contains the year, month, day, date with the connection between the sign () connection. ) time(時(shí)間型) ,包含小時(shí)、分鐘、秒,小時(shí)、分鐘、秒之間用冒號(hào)(:)分隔 (time (time type), including hours, minutes, seconds, hours, minutes, seconds with a colon (:) separated) string(字符串型) ,字符串要用引號(hào)括起來(lái) (string (string), string enclosed in quotation marks ) PowerScript語(yǔ)言 數(shù)據(jù)類(lèi)型、變量和常量 ( 2)變量的聲明 (Variables Declaration ) 變量是指在程序運(yùn)行過(guò)程中其值可以改變的量。 (Variable refers to the program is running, the amount of its value can be changed. ) ?變量聲明的一般語(yǔ)法結(jié)構(gòu)是: 數(shù)據(jù)類(lèi)型 標(biāo)識(shí)符 [=初值 ] [,標(biāo)識(shí)符 =[初值 ]][, … ] (The general structure of variable declaration syntax is: Data type identifier [= initial value] [, identifier = [initial]] [, ...] ) 變量未賦初值,系統(tǒng)會(huì)自動(dòng)賦給變量默認(rèn)值。如:數(shù)值型變量的默認(rèn)初值是 0。 (Variable is not assigned the initial value, the system will be aut
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