分享興趣，傳播快樂，
增長見聞，留下美好！
親愛的您，這裡是LearningYard新學苑。
今天小編為你帶來
小高分享（26）C語言中的選擇控制結構
歡迎您的通路！
Share interests, spread happiness,
increase knowledge, and leave beautiful!
Dear you, this is LearningYard Academy.
Today, the editor brings you
Xiaogao Sharing (26) Selection control structure in C language
welcome your visit!
一、基本概念
First, basic concepts
選擇控制結構允許程式根據特定的條件執行不同的代碼路徑。在C語言中，選擇控制結構主要包括if、else if和else語句。這些語句根據表達式的真假值來決定執行哪一段代碼。
The selection control structure allows the program to execute different code paths based on specific conditions. In C language, the selection control structure mainly includes if, else if and else statements. These statements determine which piece of code to execute based on the true or false value of the expression.
1、if語句：當指定的條件為真時，執行相應的代碼塊。
1, if statement: When the specified condition is true, execute the corresponding code block.
2、else if語句：當if語句的條件為假時，可以繼續使用else if來檢查其他條件。
2, else if statement: When the condition of the if statement is false, you can continue to use else if to check other conditions.
3、else語句：當所有if和else if的條件都為假時，執行else中的代碼塊。
3, else statement: When all if and else if conditions are false, execute the code block in else.
此外，switch語句是另一種選擇控制結構，它允許根據變量的值選擇多個執行路徑。
In addition, the switch statement is another selection control structure that allows multiple execution paths to be selected based on the value of a variable.
二、應用場景
Second, application scenarios
1、使用者輸入處理：根據使用者的輸入選擇不同的操作或響應。
1, user input processing: according to the user's input to select different operations or responses.
2、檢查：在程式中檢查錯誤條件，并根據錯誤類型采取相應的措施。
2, check: check the error conditions in the program, and take appropriate measures according to the error type.
3、狀态機實作：在複雜的狀态轉換邏輯中使用選擇控制結構來簡化代碼。
3, state machine implementation: Use selection control structures in complex state transition logic to simplify code.
4、算法優化：在算法設計中，根據不同的情況選擇最優的執行路徑。
4. algorithm optimization: In algorithm design, the optimal execution path is selected according to different situations.
三、重要性
Third, importance
1、靈活性：通過選擇控制結構，程式可以根據不同的條件執行不同的操作，提高了程式對各種情況的适應能力。
1, flexibility: by choosing the control structure, the program can perform different operations according to different conditions, improving the adaptability of the program to various situations.
2、可讀性：合理使用選擇控制結構可以使代碼結構清晰，易于了解和維護。
2, readability: The rational use of the selection control structure can make the code structure clear, easy to understand and maintain.
3、效率：在處理分支邏輯時，選擇控制結構可以減少不必要的計算，提高程式運作效率。
3, efficiency: when dealing with branch logic, the choice of control structure can reduce unnecessary calculations and improve the efficiency of program operation.
選擇控制結構是C語言程式設計的核心組成部分，它使程式能夠根據不同的條件執行不同的操作，進而實作複雜的功能。掌握選擇控制結構對于C語言程式員來說至關重要，它不僅能夠提高代碼的品質和效率，還能夠增強程式的功能性和靈活性。在編寫C語言程式時，正确且高效地使用選擇控制結構，是每個程式員都需要掌握的技能。
The selective control structure is the core component of C programming, which enables the program to perform different operations according to different conditions, so as to achieve complex functions. It is very important for C programmers to master the selection control structure, which can not only improve the quality and efficiency of code, but also enhance the functionality and flexibility of the program. When writing C programs, the correct and efficient use of the selection control structure is a skill that every programmer needs to master.
今天的分享就到這裡了。
如果您對今天的文章有獨特的想法，
歡迎給我們留言，
讓我們相約明天，
祝您今天過得開心快樂！
That's it for today's sharing.
If you have a unique idea about today’s article,
Welcome to leave us a message,
Let us meet tomorrow,
I wish you a nice day today!
本文由learningyard新學苑原創，如有侵權，請聯系我們。
部分内容參考于bilibili，百度
翻譯來源：通義千問