java - 需要 Java 方面的帮助(普通程序)

Question

我只是一个初级程序员，我被困在我的一部分代码上；有没有办法告诉编译器，如果用户输入 7，它将通过 1 2 3 4 5 6 和 7 而不是只使用 7？

import java.util.Scanner;
public class Average {
    int tests;
    int grade1, grade2, grade3, grade4, grade5, grade6, grade7, grade8, grade9, grade10;
    int total;
    double average;
    public void Average1() {

    Scanner input = new Scanner(System.in);
    System.out.println("Enter how many tests you will use. (Minimum 3, Maximum 10.) ");
    tests =  input.nextInt();
    System.out.println("Enter the grade of your first test. (Do not include %)");
    grade1 = input.nextInt();
    System.out.println("Enter the grade of your second test. (Do not include %)");
    grade2 = input.nextInt();
    System.out.println("Enter the grade of your third test. (Do not include %)");
    grade3 = input.nextInt();
    switch (tests) {

    case 4 : System.out.println("Enter the grade of your fourth test. (Do not include %)");
    grade4 = input.nextInt();
    break;

    case 5 : System.out.println("Enter the grade of your fifth test. (Do not include %)");
    grade5 = input.nextInt();
    break;

    case 6 : System.out.println("Enter the grade of your sixth test. (Do not include %)");
    grade6 = input.nextInt();
    break;

    case 7 : System.out.println("Enter the grade of your seventh test. (Do not include %)");
    grade7 = input.nextInt();
    break;

    case 8 : System.out.println("Enter the grade of your eighth test. (Do not include %)");
    grade8 = input.nextInt();
    break;

    case 9 :System.out.println("Enter the grade of your ninth test. (Do not include %)");
    grade9 = input.nextInt();
    break;

    case 10 : System.out.println("Enter the grade of your tenth test. (Do not include %)");
    grade10 = input.nextInt();
    break;
    }
    total = grade1 + grade2 + grade3;
    average = total/tests; 
}

在这个例子中，我试图制作一个基本的平均值计算器。 (这只是一个类，其他代码在单独的类中。)我需要询问用户他将输入多少个测试。 (它会自动通过 1 - 3)所以如果用户输入 6 个测试，我如何告诉编译器不要直接进入 6。我希望它通过 1-6。人们说我需要使用 for 循环，但我应该在哪里插入循环？

(请记住我只是一个初学者。)

Answer 1

您只需要使用循环来保持总计，并使用循环来收集他们为第一个问题指定的条目数。您可能希望向以下内容添加一些错误检查以处理错误的输入(比如为测试次数输入零)。

import java.util.Scanner;
public class Average {
    int tests;
    int total = 0;
    double average;
    public void Average1() {

        Scanner input = new Scanner(System.in);
        System.out.println("Enter how many tests you will use. (Minimum 3, Maximum 10.) ");
        tests =  input.nextInt();
        for (int i = 1; i <= tests; ++i) {
            System.out.println("Enter the grade of for test " + i + ". (Do not include %)");
            total += input.nextInt();
        }

        average = total/tests; 
    }
}