4.16 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 zy;
import java.util.Scanner;//
public class hj {

    public static void main(String[] args) {
         Scanner input=new Scanner(System.in);//
         int[] array = {100,50,90,90,90,90,90,90,90,90};
         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.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 zy;
import java.util.Scanner;
import java.util.Arrays;
import java.util.Random;
import java.util.Scanner;

public class hj {

    public static void main(String[] args) {

         Scanner input=new Scanner(System.in);
         System.out.println("请输入随机数范围");
            System.out.println("请输入范围中最大值");
            int  t=input.nextInt();
            System.out.println("请输入范围中最小值");
            int t1=input.nextInt();
            int a[]=new int [4];
            Random r=new Random();
            for(int y=0;y<a.length;y++) {
                a[y]=t1+r.nextInt(t);
                
            }
            Arrays.sort(a);
            for(int  u:a) {
                System.out.print(u+"\t");
            }
        }
    }

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 zy;
import java.util.Random;
public class hj {

    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号码为:");
            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(如果没有特殊说明,静态赋值动态赋值都可以),统计数组中的最大值、最小值、以及奇 数和偶数的个数

package zy;
public class hj {

    public static void main(String[] args) {


        int[] arr = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
        int max = arr[0];
        int min = arr[1];
        for (int i = 0; i < arr.length; i++) {
            if (max < arr[i]) {
                max = arr[i];
            } else if (min > arr[i]) {
                min = arr[i];
            }
        }
        System.out.println("数组的最大值是" + max + "数组的最小值是" + min);

        int count1 = 0;
        int count2 = 0;
        for (int j = 0; j < arr.length; j++) {
            if (j % 2 != 0) {
                count1++;
            } else {
                count2++;
            }
        }
        System.out.println("奇数有" + count1 + "个，" + "偶数有" + count2 + "个");
    }
}