Question

import java.util.Scanner;

public class BA4 {

public static void main(String[] args) {
    Scanner keyboard = new Scanner(System.in);
    System.out.println("Hello Drews, how many total grades do you want to process?");

    int numberOfGrades = keyboard.nextInt();
    int[] storeGrades = new int[numberOfGrades];

    for (int i = 0; i < numberOfGrades; i++) {
        System.out.println("Please enter grade " + (i + 1) + ": ");
        storeGrades[i] = keyboard.nextInt();
    }

    System.out.println("Total score is: " + (getTotalScore(storeGrades)));
    System.out.println("Lowest score is: " + (getLowestScore(storeGrades)));
    System.out.println("Highest score is: " + (getHighestScore(storeGrades)));
    System.out.println("Average score is: " + (averageScore(String.format("%.2f", storeGrades))));
}

public static int getTotalScore(int[] storeGrades) {
    int sum = 0;
    for (int i = 0; i < storeGrades.length; i++) {
        sum += storeGrades[i];
    }
    return sum;
}

public static int getLowestScore(int[] storeGrades) {
    int getLowestScore = 0;
    for (int i = 0; i > storeGrades.length; i++) {
        getLowestScore = storeGrades[i];
    }
    return getLowestScore;
}

public static int getHighestScore(int[] storeGrades) {
    int getHighestScore = 0;
    for (int i = 0; i < storeGrades.length; i++) {
        getHighestScore = storeGrades[i];
    }
    return getHighestScore;
}

public static double averageScore(double[] storeGrades) {
    double averageScore = 0;
    for (int i = 0; i < storeGrades.length; i++) {
        averageScore = (double) storeGrades[i];
    }
    return averageScore;
}

public static int printGrade(int[] storeGrades) {
    int printGrade;
    if (printGrade > 89) {
        String gradeSoFar = "A";
        System.out.println("Your grade so far is an " + gradeSoFar);
    }
    else if ((printGrade > 79) && (printGrade < 90)) {
        String gradeSoFar = "B";
        System.out.println("Your grade so far is a " + gradeSoFar);
    }
    else if ((printGrade > 69) && (printGrade < 80)) {
        String gradeSoFar = "C";
        System.out.println("Your grade so far is a " + gradeSoFar);
    }
    else if ((printGrade > 59) && (printGrade < 70)) {
        String gradeSoFar = "D";
        System.out.println("Your grade so far is a " + gradeSoFar);
    }
    else if ((printGrade > 0) && (printGrade < 60)) {
        String gradeSoFar = "F";
        System.out.println("Your grade so far is an " + gradeSoFar);
    }
    return printGrade;
}
}

我正在尝试找出我要去哪里。我有几个错误，使我相信我真的不如我想象的那样理解方法。目标是创建向用户显示总分，最低分，最高分和平均分的5种方法，然后打印字母等级。感谢您对这个noobie Java编码器的帮助！：）

Answer 1

您应该在此行中将String传递到Double[]函数中时传递averageScore：

System.out.println("Average score is: " + (averageScore(String.format("%.2f", storeGrades))));

并且您没有在printGrade函数中初始化printGrade变量，如果要在比较中使用它，则需要给它一个初始值。

那是所有的错误

Java |如何使用多种方法来打印成绩分数？

1 个答案: