
[數] 算術表達式
It should be set to an arithmetic expression that has an integer as a result.
它設置了一個完整的數學表達應該能得到一個完整的結果。
The arithmetic expression involving the START_DATE column makes the predicate non-indexable.
算術表達式包含 START_DATE 列使得謂詞不可索引。
This article used the operator first to analyze and the storehouse method has given the arithmetic expression computation process.
本文采用算符優先分析和堆棧的方法給出了算術表達式的計算過程。
Normally we would use the compiler generator tools lex and yacc to build that part of the program which recognizes an arithmetic expression.
一般說來,我們将要通過規定的編譯工具和另外的某編譯器來生成能計算這個算術運算的目标程式。
An arithmetic expression is correct if and only if brackets placed correctly.
當且僅當括號匹配正确,表達式才是正确的。
Computed using an arithmetic expression on the original text or attribute value
使用算術表達式基于初始文本或屬性值進行計算
This paper discusses the function of control static output in the PID arithmetic expression and gives, out several methods of PID arithmetic expression.
讨論了PID算式中穩态控制輸出在算式中的作用,同時讨論并給出了提高PID算式控制效果的幾種措施。
For example, arithmetic expression evaluation is performed in left-to-right order (JLS section 15.6) as viewed by the thread performing the operations, but not necessarily as viewed by other threads.
例如,算術表達式的計算線上程内看來是從左到右地執行操作(JLS 15.6章節),而這種執行效果是沒有必要被其他線程觀察到的。
A special value that indicates an arithmetic expression returned a value that was not a number.
一個特殊值,此值指示算術表達式返回了非數字值。
An arithmetic compute method is exploited to replace look-up table, and the arithmetic expression is optimized with technology of unfolding and share.
利用算術計算替代查找表,且通過展開和共享技術對算術表達式進行優化;
So the PostScript command 3 7 mul 2 add is equivalent to the arithmetic expression (3 * 7) + 2.
因此PostScript命令37mul2add等效于算術表達式 (3 *7) +2。
In the COBOL system, the information represented by a data item, arithmetic expression, or conditional expression.
在COBOL系統中,由一個數據項、算術表達式或條件表達式表示的信息。
It should be set to an arithmetic expression_r that has an integer as a result.
它設置了一個完整的數學表達應該能得到一個完整的結果。
Persistent Puzzle alarm: an optional feature that makes the alarm sound until you solve an arithmetic expression or input the shown random 4-digits number.
持久益智報警:一可選功能,使報警聲,直到你解決一個算術表達式或輸入所顯示的隨機4位數。
Done using an arithmetic expression evaluation stack: file input from the keyboard or an arithmetic expression, calculate and display the results.
利用棧完成算術表達式求值:從鍵盤或文件中輸入算術表達式,計算其結果并顯示。
By constructing the BOM structure model, mathematic expression and arithmetic of the four types of Items in the multi-view mapping course is deducted.
通過建立BOM結構數學模型,推導了四種類型物料項映射規則的數學表達式和相應的算法。
Chapter 5 introduces expression for arithmetic figure about immaterial display design introduction and related to computer technique.
第五章介紹了非物質展示設計的數字化表達及相關的計算機技術。
This thesis introduces the arithmetic design that how regular expression switches to minimum state DFA and the method how finite automata switches to regular expression.
本文主要介紹基于編譯器構造技術中的由正規表達式到最小化DFA的算法設計和實現技術,以及自動機轉換正規式的方法。
To perform basic arithmetic, you can embed the expression into $(( )) (see Listing 13).
若要執行基本的算術運算,您可以在 $(( ))中嵌入表達式(請參見清單13)。
The paper describes the RSA arithmetic about cipher, showing the exponential expression of it.
就密碼學中的RSA算法進行了描述,指出RSA算法的指數表達式;
As mentioned, expression nodes also support ****** arithmetic and logical expressions.
如前面所述,表達式節點還支持簡單的算術和邏輯表達式。
The realization of expression LRAUC single-path testing is described, and the arithmetic to construct the constraint set of expression LRAUC single-path testing is given.
闡述了表達式LRAUC單路測試方法的具體實現,給出了表達式LRAUC單路測試約束集構造算法;
It introduces the method of the text auto-categorization, briefly describes the vector space model expression, and finally gives training arithmetic and categorization arithmetic of the text.
本文介紹了文本自動分類的研究方法,文本的向量空間模型表示.并給出了文檔的訓練算法和分類算法。
The paper describes the RSA arithmetic about cipher, and shows the exponential expression of it.
針對密碼學中的RSA算法進行了描述,指出RSA算法的指數表達式;
Decision Tree arithmetic can easily create an IF-THEN expression.
決策樹算法的最大優點是能夠很容易地産生出IF-THEN表達式。
Expression nodes support ****** expressions involving arithmetic and boolean (true or false logic) operators.
表達式節點支持包含算術和布爾(真或假邏輯)運算符的簡單表達式。
It makes a close combination of arithmetic and geometric operations, forming a new way of expression of plane figures.
把算術運算和幾何運算緊密結合起來,形成新穎的平面圖形表達方法。
The most common cause is that the function contains a complex expression of user-defined class variables and arithmetic operators.
最常見的子句是包含用戶定義的類變量和算術運算符的複雜表達式的函數。
算術表達式(Arithmetic Expression)指由操作數(數值、變量或函數返回值)和算術運算符組合而成,用于執行數學計算的式子。其核心目的是通過運算符規定的運算規則,将操作數組合起來産生一個數值結果。
以下是其關鍵要素的詳細解釋:
操作數 (Operands):
5
, 3.14
, -10
。x
, count
, total_price
。sqrt(9)
返回 3, random
返回一個隨機數。算術運算符 (Arithmetic Operators):
+
):将兩個操作數相加。-
):将第一個操作數減去第二個操作數。/
):将第一個操作數除以第二個操作數。%
):返回第一個操作數除以第二個操作數後的餘數(主要用于整數)。-
):改變單個操作數的符號(如 -x
)。或
^)**:将第一個操作數提升到第二個操作數指定的幂次(如
2 ** 3或
2 ^ 3等于 8)。注意:
^` 在某些語言中可能表示按位異或而非指數。計算規則與優先級:
*
, /
, %
) 通常優先于加法和減法 (+
, -
)。( )
:用于顯式地改變默認的計算順序,括號内的表達式總是最先計算。示例:
5 + 3 * 2
:結果是 11
(因為乘法 3 * 2 = 6
優先于加法 5 + 6
)。(5 + 3) * 2
:結果是 16
(括號強制先計算 5 + 3 = 8
,然後 8 * 2
)。10 / (2 + 3)
:結果是 2
(先計算括號 2 + 3 = 5
,然後 10 / 5
)。-x + y * 5
:先對 x
取負,y
乘以 5
,然後将兩者相加。area = width * height
:這是一個賦值語句,其中的 width * height
是一個算術表達式,其計算結果被賦給變量 area
。應用場景: 算術表達式是編程、腳本語言、電子表格、數據庫查詢、數學軟件以及任何需要進行數值計算的領域的基礎構建塊。它們用于計算數值、定義公式、進行條件判斷等。
參考資料:
"Arithmetic expression"(算術表達式)是指由數字、運算符和括號組成的數學結構,用于執行基本算術運算并産生數值結果。以下是詳細解析:
核心組成
運算優先級 遵循數學中的運算順序規則(PEMDAS/BODMAS):
括號 → 指數 → 乘除 → 加減
例如:$2 + 3 times 4 = 14$(先乘後加)
表達式類型
應用場景
3 * (a + b)
=SUM(A1:A5)*0.1
特殊說明
**
表示指數,MATLAB用^
)例如表達式$2 times (3 + 5)$的計算過程:
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