跳到主要內容

計算導論與 C 語言基礎:第八週(C語言中的數據成分 Part II)

C語言中的數據成分 Part II




賦值運算符用法
基本注意事項:
✔ int a = 5;
✔ int a, b, c = 5;
❌ int a = b = c = 5


4 點要點說明



表達式:程序中油運算符號、操作數和括號組成的計算式,是計算求職的基本單位。


表達式的簡寫:
表達式的連續運算規則


算式表達式
*利用“%”運算,整數除以整數求出來的結果還是整數。
捨入(四捨五入)的結果會隨著編譯器的不同,而會有結果的差異。


當表達是相當複雜的時候如何處理?
剪刀法求值:
  1. 先對運算符級別低的進行
  2. 再由最後下刀的左右兩處進行求值
  3. 接著依序求值,如下


計算過程中的數據類型轉換:


自增、自減運算




終極繞口令~


關係運算符
(也有優先級)

邏輯表達式的取捨,有必要才要執行,不會做多餘的判斷









條件運算符




強制類型轉換



留言

這個網誌中的熱門文章

【Android Development for Beginners】 Lesson 2A : Create a New Project , Plan How to Build the Layout, Build Layout

This Notes is according to the udacity free course : Android Development for Beginners Lesson 2A : Create a New Project Plan How to Build the Layout Build layout Follow the instruction below to build up a new app called "Just Java" use empty activity .

【Android Development for Beginners】Lesson 2B : String Data Type, Combining Strings Together, and Integer Variables

This Notes is according to the udacity free course : Android Development for Beginners Lesson 2B :  String Data Type,  Combining Strings Together and Integer Variables Finally We cross the river and change the layouts successfully. But We can do it better by letting the price change automatically but not change after the we click the "order" button. So this is what we want to do in this class.

【Android Development for Beginners】Lesson 2A : Make the Quantity Picker Work

This Notes is according to the udacity free course : Android Development for Beginners Lesson 2A : Make the Quantity Picker Work In Last Class we still cannot fix the problem to increase the coffee quantity automatic. After the practice, now we can face the problem.