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                # Java 程序:計算和顯示學生成績 > 原文: [https://beginnersbook.com/2017/09/java-program-to-calculate-and-display-student-grades/](https://beginnersbook.com/2017/09/java-program-to-calculate-and-display-student-grades/) 該程序根據用戶在每個科目中輸入的標記計算學生的成績。程序根據此邏輯打印等級。 如果標記的平均值`>= 80`則打印等級`'A'` 如果平均值`< 80`且`>= 60`則打印等級`'B'` 如果平均值`< 60`和`>= 40`然后打印等級`'C'` 否則打印等級`'D'` 要理解本程序,您應該具備以下 [Java](https://beginnersbook.com/java-tutorial-for-beginners-with-examples/) 概念的知識: * [Java `For`循環](https://beginnersbook.com/2015/03/for-loop-in-java-with-example/) * [Java 中的數組](https://beginnersbook.com/2013/05/java-arrays/) * [Java 中的`if..else-if`](https://beginnersbook.com/2017/08/if-else-statement-in-java/) ## 示例:顯示學生成績的程序 ```java import java.util.Scanner; public class JavaExample { public static void main(String args[]) { /* This program assumes that the student has 6 subjects, * thats why I have created the array of size 6\. You can * change this as per the requirement. */ int marks[] = new int[6]; int i; float total=0, avg; Scanner scanner = new Scanner(System.in); for(i=0; i<6; i++) { System.out.print("Enter Marks of Subject"+(i+1)+":"); marks[i] = scanner.nextInt(); total = total + marks[i]; } scanner.close(); //Calculating average here avg = total/6; System.out.print("The student Grade is: "); if(avg>=80) { System.out.print("A"); } else if(avg>=60 && avg<80) { System.out.print("B"); } else if(avg>=40 && avg<60) { System.out.print("C"); } else { System.out.print("D"); } } } ``` 輸出: ```java Enter Marks of Subject1:40 Enter Marks of Subject2:80 Enter Marks of Subject3:80 Enter Marks of Subject4:40 Enter Marks of Subject5:60 Enter Marks of Subject6:60 The student Grade is: B ```
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