Question

正如标题所述，我试图找到最大值和最小值，平均数和赔率数，以及所有输入数字的平均值。

问题所在。当我运行我的代码时，我的赔率和平均值计数器似乎正在读取它们的相反，奇数会读取偶数输入甚至会读取奇数输入。至于我的平均水平，我不知道它有什么问题，我所知道的是它只能找到适当分数的平均值。

我的输出示例将在最后粘贴。

import java.util.Scanner;

public class Homework7APrinter
{
    public static void main (String[] args)
    { 
        System.out.println("Enter a sequence of integers. Any non-integer to quit");
        Scanner scan = new Scanner (System.in);
        int min = Integer.MAX_VALUE;
        int max = 0;
        int count = 0;
        int sum = 0;
        int oddsCounter = 0;
        int evensCounter = 0;
        int getInt = Integer.MIN_VALUE;
        double average = 0;
        boolean notnull = true;

        while(scan.hasNextInt())
        {
            if(true)
            {
                if (getInt%2==1)
                {
                    evensCounter++;
                    System.out.println("even: " + evensCounter);
                }
                else
                {
                    oddsCounter++;
                    System.out.println("odd: " + oddsCounter);
                }

                getInt = scan.nextInt();

                if(getInt < min)
                {
                    min = getInt;
                }
                else if(getInt > max)
                {
                    max = getInt;
                }
            }
            else
            {
                notnull = false;
            }

            sum += getInt;
            System.out.println("sum " +sum);
            count++;
            System.out.println("count " +count);
            average = sum/(count);
            System.out.println("average " +average);
        }

        System.out.println("smallest: " + min);
        System.out.println("largest: " + max);
        System.out.println("even: " + oddsCounter);
        System.out.println("odd: " + evensCounter);
        System.out.println("average: " + average);
    }
}

结果：

Enter a sequence of integers. Any non-integer to quit
1 //first input
odd: 1
sum 1
count 1
average 1.0
2 //second input
even: 1
sum 3
count 2
average 1.0
3 //third input
odd: 2
sum 6
count 3
average 2.0
4 //fourth input
even: 2
sum 10
count 4
average 2.0
q //quit the scan
smallest: 1
largest: 4
even: 2
odd: 2
average: 2.0 //average of 1, 2, 3, 4 = sum/n = 10/4 = 2.5 not 2.0

任何帮助将不胜感激。谢谢！

Answer 1

(getInt%2==1)实际上是对奇数的检查，偶数检查应为getInt%2==0

Answer 2

很少 -

移动getInt = scan.nextInt（）;如果（真实）条件
平均值为 - 平均=（双）和/（计数）;
对于偶数/奇数问题进行此更改 - if（getInt％2 == 0）

所以这是你的代码，有一些清理 -

    System.out.println("Enter a sequence of integers. Any non-integer to quit");
    Scanner scan = new Scanner(System.in);
    int min = Integer.MAX_VALUE;
    int max = 0;
    int count = 0;
    int sum = 0;
    int oddsCounter = 0;
    int evensCounter = 0;
    int getInt;
    double average = 0;

    while (scan.hasNextInt()) {

        getInt = scan.nextInt();
        if (getInt % 2 == 0) {
            evensCounter++;
            System.out.println("even: " + evensCounter);
        } else {
            oddsCounter++;
            System.out.println("odd: " + oddsCounter);
        }

        if (getInt < min) {
            min = getInt;
        } else if (getInt > max) {
            max = getInt;
        }

        sum += getInt;
        System.out.println("sum " + sum);
        count++;
        System.out.println("count " + count);
        average = (double) sum / (count);
        System.out.println("average " + average);
    }

    System.out.println("smallest: " + min);
    System.out.println("largest: " + max);
    System.out.println("even: " + oddsCounter);
    System.out.println("odd: " + evensCounter);
    System.out.println("average: " + average);

Answer 3

这就是你要找的东西

 while(scan.hasNextInt())
        {

            getInt = scan.nextInt();
//            if(true)
//            {
                if (getInt%2==0)
                {
                    evensCounter++;
                    System.out.println("even: " + evensCounter);
                }
                else
                {
                    oddsCounter++;
                    System.out.println("odd: " + oddsCounter);
                }

                //getInt = scan.nextInt();

                if(getInt < min)
                {
                    min = getInt;
                }
                else if(getInt > max)
                {
                    max = getInt;
                }
//            }
//            else
//            {
//                notnull = false;
//            }

            sum += getInt;
            System.out.println("sum " +sum);
            count++;
            System.out.println("count " +count);
            average = (double)sum/(count);
            System.out.println("average " +average);
        }

Answer 4

你的程序中有五个错误

您打印不正确（System.out.println（“even：”+ oddsCounter））。甚至应该作为偶数打印
您必须将总和也设为double或float，以获得十进制格式的平均值。
在进行奇数偶数测试之前，您必须阅读getINT。
偶数/奇数计算错误。它应该是getInt％2 == 0
在计算min和max时，你不应该有if / else。它应该是两个单独的if

以下完整的工作计划。

package com.stackoverflow.test;

import java.util.Scanner;

public class Homework7APrinter { public static void main（String [] args）{ System.out的 .println（“输入一个整数序列。任何要退出的非整数”）; 扫描仪扫描=新扫描仪（System.in）; int min = Integer.MAX_VALUE; int max = Integer.MIN_VALUE; int count = 0; double sum = 0; int oddsCounter = 0; int evensCounter = 0; int getInt = 0; double average = 0;

    while (scan.hasNextInt()) {

        getInt = scan.nextInt();
        if (getInt % 2 == 0) {
            evensCounter++;
            // System.out.println("even: " + evensCounter);
        } else {
            oddsCounter++;
            // System.out.println("odd: " + oddsCounter);
        }

        if (getInt < min) 
        {
            min = getInt;
        }

        if (getInt > max)
        {
            max = getInt;
        }

        sum += getInt;
        // System.out.println("sum " +sum);
        count++;
        // System.out.println("count " +count);
        average = sum / (count);
        // System.out.println("average " +average);
    }
    System.out.println("*****************");
    System.out.println("smallest: " + min);
    System.out.println("largest: " + max);
    System.out.println("even: " + evensCounter);
    System.out.println("odd: " + oddsCounter);
    System.out.println("average: " + average);
    System.out.println("sum: " + sum);
    System.out.println("count: " + count);
}

}

查找最小值，最大值，Evens，赔率和平均值。 Java的

4 个答案: