java第九次作业

1.有10个评委打分,(去掉一个最高一个最低)求平均分

package one;
import java.util.Scanner;
public class one1 {
    public static void main(String[] args) {
         int []a = {89,99,90,79,98,78,88,86,94,98};
         int index = 0,sum = 0,temp = 0,avg = 0;
         for(int i = 0;i<a.length;i++) {
             for(int j = 0;j<a.length;j++){
                 if(a[j] <a[i]) {
                     temp = a[i];
                     a[i] = a[j];
                     a[j] = temp;
                 }
             }
         }
         while(a.length != index) {
             sum +=a[index];
             index++;
         }
         do{
             sum = sum-a[0] - a[a.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 one;
import java.util.Random;
public class one1 {
    public static void main(String[] args) {
        Random r = new Random();
        int k = r.nextInt(3)+ 3;
        for(int j = 0;j< 10; j++) {
            int i = r.nextInt(100);
            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 one;

import java.util.Random;

public class one1 {
    public static void main(String[] args) {
        int a[] = new int[7];
        int i, m, j;
        fan: for (j = 0; j < 7; j++) {
            a[j] = (int) (Math.random() * 35 + 1);
            m = a[j];
            if (j >= 1) {
                for (i = 0; i < j; i++)
                    if (a[i] == m) {
                        j--;
                        continue fan;
                    }
            }
            if (a[j] < 10)
                System.out.print("0" + a[j] + "  ");
            else
                System.out.print(a[j] + "  ");
        }
    }

    public static void main1(String args[]) {
        int n = Integer.parseInt(args[0]);
        System.out.println("中国福利彩票35选7");
        for (int i = 0; i < n; i++) {
            System.out.println();
        }
    }
}

 

 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 one;

import java.util.Random;

public class one1 {
    public static void main(String[] args) {
        int[] arr = { 34,56,34,33,25,2,7,899,56,12 };
        int max = arr[0];
        int min = arr[0];
        int ou = 0;
        for (int i = 0; i < arr.length; i++) {
            if (max < arr[i]) {
                max = arr[i];
            }
            if (min > arr[i]) {
                min = arr[i];
            }
            if (arr[i] % 2 == 0) {
                ou++;
            }
        }
        System.out.println("最大值" + max);
        System.out.println("最小值" + min);
        System.out.println("偶数有" + ou);
        System.out.println("奇数有" + (10 - ou));
    }

}