java - 简单的平均误差，找不到正确的代码

Question

我终于编写了我的程序(因为我是初学者，所以花了一段时间)，该程序的作用是:

• 打印带有 2 个选项的菜单:平均成绩或退出。

• 如果用户选择平均成绩，它会询问他们的姓名。然后它告诉他们成绩的平均顺序。

• 然后他们输入任意数量的成绩，然后按 -1，它会给出这些成绩的总和以及平均值。对于家庭作业、测验和测试，它会执行 3 次。

我需要做的最后一件事是平均所有 3 个成绩，然后输出:

• System.out.println( name, "平均值为 ", +averageFinal );

我的作业中给出了这一行:

Final Average = 0.25*HomeworkAvg + 0.25*QuizAvg + 0.50*TestAvg = 77.87

我试图将其放入程序中:

averageFinal = 0.25*averageOne + 0.25*averageTwo + 0.50*averageThree;

但由于某种原因，我遇到了这个奇怪的编译错误，我似乎无法修复:

Assignment3.java:120: error: cannot find symbol
System.println( name, "'s final average is ", averageFinal );
       ^
symbol:   method println(String,String,double)
location: class System
1 error

我的代码是否存在一个简单的问题，或者我是否必须更改字符串方法中的某些内容？

import java.util.Scanner;

public class Assignment3 {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        int choice;
        int total;
        double averageOne;
        double averageTwo;
        double averageThree;
        double averageFinal;
        int grade;

        int gradeCounterone;
        int gradeCountertwo;
        int gradeCounterthree;

        gradeCounterone = 0;
        gradeCountertwo = 0;
        gradeCounterthree = 0;
        total = 0;

        String name;

        System.out.println("Enter 1 or 2: \n 1 - Average grades \n 2 - Quit");
        choice = input.nextInt();

        if (choice == 1) {
            System.out.println("Enter the students name:");
            name = input.next();

            System.out.println("Grades will be entered in this order: \n 1) Homework Grades \n 2) Quiz Grades \n 3) Test Grades ");

            {
                System.out.println("Enter homework grades, press -1 when finished:");
                grade = input.nextInt();

                while (grade != -1) {
                    total = total + grade;
                    gradeCounterone = gradeCounterone + 1;

                    System.out.println("Enter homework grades, press -1 when finished:");
                    grade = input.nextInt();

                }
                if (gradeCounterone != 0) {
                    averageOne = (double) total / gradeCounterone;

                    System.out.printf("\nThe total of the %d homework grades is %d\n", gradeCounterone, total);
                    System.out.printf("\nThe average of the homework grades is %.2f\n ", averageOne);

                }

                // second loop for quiz grades

                System.out.println("\nEnter quiz grades, press -1 when finished:");
                grade = input.nextInt();

                while (grade != -1) {
                    total = total + grade;
                    gradeCountertwo = gradeCountertwo + 1;

                    System.out.println("Enter quiz grades, press -1 when finished:");
                    grade = input.nextInt();

                }
                if (gradeCountertwo != 0) {

                    averageTwo = (double) total / gradeCountertwo;

                    System.out.printf("\nThe total of the %d quiz grades is %d\n", gradeCountertwo, total);
                    System.out.printf("\nThe average of the quiz grades is %.2f\n ", averageTwo);

                }

                // third loop for test grades

                System.out.println("\nEnter test grades, press -1 when finished:");
                grade = input.nextInt();

                while (grade != -1) {
                    total = total + grade;
                    gradeCounterthree = gradeCounterthree + 1;

                    System.out.println("Enter test grades, press -1 when finished:");
                    grade = input.nextInt();

                }
                if (gradeCounterthree != 0) {

                    averageThree = (double) total / gradeCounterthree;

                    System.out.printf("\nThe total of the %d test grades is %d\n", gradeCounterthree, total);
                    System.out.printf("\nThe average of the test grades is %.2f\n ", averageThree);

                }

                averageFinal = 0.25 * averageOne + 0.25 * averageTwo + 0.50 * averageThree;
                System.println(name, "'s final average is ", averageFinal);

            }

        } else if (choice == 2) {
            System.out.println("Exiting program.");
        } else {
            System.out.println("Invalid response, exiting program.");
        }
    }
}

Answer 1

应该是:

System.out.println( name + " s final average is " + averageFinal );

而不是

System.println( name, "' s final average is ", averageFinal );