2020.4.16.java上机作业

1.有10个评委打分,(去掉一个最高一个最低)求平均分

package com.itheima01;

import java.util.Scanner;

public class HelloWorld {
    public static void main(String[] args) {
        avg10();
        }
        public static void avg10() {
        int[] array = {3, 5, 1, 0, 10, 9, 8, 9, 4, 6};
        int index = 0, sum = 0, temp = 0, avg = 0 ;
        for (int i = 0; i < array.length - 1; i++) {
        for (int j = i + 1; j < array.length; j++) {
        if (array[j] < array[i]) {
        temp = array[i];
        array[i] = array[j];
        array[j] = temp;
        }
        }
        }
        while (array.length != index) {
        sum += array[index];
        index++;
        }
        do {
        sum = sum - array[0] - array[array.length-1]; 
        } while (false);
        avg = sum / 8;
        System.out.println(avg);
        }
}

2.自学一下Java随机数，生成一个长度为10的随机数组（每个数的范围是0~99），排序后输出

package com.itheima01;

import java.util.Random;

public class HelloWorld {
    public static void main(String[] args) {
          int[] a = new int[10];
            Random r=new Random();
            for (int i = 0; i < a.length; i++) {
                a[i]=r.nextInt(100);
            }
            int t;
            for (int i = 0; i < a.length - 1; i++) {
                for (int j = 0; j < a.length-1-i; j++) {
                    if (a[j + 1] > a[j]) {
                        t = a[j];
                        a[j] = a[j + 1];
                        a[j + 1] = t;
                    }
                }
            }
            for (int i : a) {
                System.out.println(i);
            }
 
        }
}

3.制作彩票35选7程序。 （就是1~35随机生成7个不重复的数）

package com.itheima01;

import java.util.Random;

public class HelloWorld {
    public static void main(String[] args) {
        int[] score = new int[7];
        Random r = new Random();
        for (int i = 0; i < score.length; i++) {
            score[i] = r.nextInt(35) + 1;
        }
        System.out.println("35选7号码是:");
        for (int i = 0; i < score.length; i++) {
            System.out.println(score[i]);
        }
    }
}

4.定义一个长度为10的int数组,统计数组中的最大值、最小值、以及奇数和偶数的个数

package com.itheima01;

import java.util.Random;

public class HelloWorld {
    public static void main(String[] args) {
        Random r=new Random ();
        int []arr=new  int [10];
        for (int i = 0; i < arr.length; i++) {
            arr[i]=r.nextInt(100);
        }
        for (int i = 0; i < arr.length; i++) {
            System.out.print(arr[i]+" ");
        }
        int max=0,min=arr[0],jishu=0,oushu=0;
        for (int i = 0; i < arr.length; i++) {
            if(max<arr[i])
                max=arr[i];
        }
        for (int i = 0; i < arr.length; i++) {
            if(arr[i]<min)
                min=arr[i];
        }
        for (int i = 0; i < arr.length; i++) {
            if(arr[i]%2==0)
                oushu+=1;
            else
                jishu+=1;
        }
        System.out.println("max="+max+",min="+min+",奇数个数"+jishu+",偶数个数"+oushu);
    }
}