Question

import java.io.*;
import java.util.Scanner;

public class Lab6_5 {
//
    static String studentName ="NO NAME";
    static int right = 0;
    static int number1=0;
    static int number2=0;
    static int answer=0;
    static double averageRight= 0.0;
    static int counter=0;

//The main function
    public static void main (String [] args) {
        inputName ();
        while (counter >=5) {
            getNumber();
            getAnswer ();
            checkAnswer ();
            counter= counter+1;
        }
        result ();
        displayInfo ();
    }

//
    public static String inputName (){
        Scanner keyboard = new Scanner(System.in);
        System.out.print ("Enter student name: ");
        studentName = keyboard.next();
        return studentName;
    }
//
    public static int getNumber (){
        number1 =(int)((Math.random() * 500) + 1);
        number2 =(int)((Math.random() * 500) + 1);
        return number2;
    }
//
    public static int getAnswer (){
        System.out.println ("What is the answer to the following equation: ");
        System.out.print(+number1);
        System.out.print (" + ");
        System.out.println (+number2);
        Scanner keyboard = new Scanner (System.in);
        System.out.println ("What is the sum: ");
        answer = keyboard.nextInt ();
        return answer;
    }
//
    public static int checkAnswer (){
        if (number1 + number2 == answer) {
            System.out.println ("Right");
            right = right + 1;
        }
        else
            System.out.println ("Wrong");
        return right;
    }
//
    public static double result (){
        averageRight = right/5;
        return averageRight;
    }

    public static void displayInfo (){
        System.out.println ("Information for student: "+studentName);
        System.out.println ("The number right: "+right);
        System.out.println ("The average right is: " +averageRight);
    }

}

这是我的问题。该程序应该生成5个随机数学方程并检查答案。完成后，它会显示结果。唯一的问题是它没有循环。超过6个小时后，我发现最好寻求帮助。

Answer 1

循环的条件 - while (counter >=5) - 始终为false，因为counter初始化为0。

更改

while (counter >=5)

到

while (counter <=5)

Answer 2

您的问题是while (counter >=5)是false。

但真正的问题是，你为什么要使用所有方法和字段的类静态？

这不是一种使用java的好方法。

Answer 3

while（counter＆lt; = 5）

时更改while（counter＆gt; = 5）

Answer 4

同时（计数器<= 5）

您的条件不正确。请更正。

虽然循环不工作:(

4 个答案: