4.16第七周上机作业

1.有10个评委打分,(去掉一个最高一个最低)求平均分。

import java.util.*;
public class Lei {
    public static void main(String[] args) {
         int a[] = {5,4,8,6,7,6,5,8,8,10};
         int q = 0;
         for (int i = 0; i < a.length; i++) {
             for (int j = 0; j < a.length; j++) {
                 int temp = 0;
                 if (a[i]>a[j]) {
                     temp=a[i];
                     a[j]=temp;
                     break;
                 }
             }
         }
         a[0]=0;
         a[9]=0;
         for (int x = 0; x < a.length; x++) {
             q=a[x]+q;
         }
         q=q/8;
         System.out.println("平均分是：" + q);
     }

 }

2.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。

{45,88,72,32,}

package bao;

import java.util.*;
public class Lei {
    public static void main(String[] args) {
        int[] a = new int[10];
        Random r = new Random();
        for (int i = 0; i < 10; i++) {
            a[i] = r.nextInt(100);
        }
        for (int i = 0; i < a.length - 1; i++) {
            for (int j = 0; j < a.length - 1 - i; j++) {
                if (a[j] > a[j + 1]) {
                    int temp = a[j];
                    a[j] = a[j + 1];
                    a[j + 1] = temp;
                }
            }
        }
        System.out.println("排序后输出为:");
        for (int i = 0; i < 10; i++) {
            System.out.println( a[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 bao;

import java.util.Random;
import java.util.*;
public class Lei {
    public static void main(String[] args) {
        int[] a= new int[35];
        Random r=new Random();
        for (int i = 0; i < a.length; i++) {
            a[i]=r.nextInt(34)+1;
        }
        int[] b=new int[7];
        for (int j = 0; j < 7; j++) {
            b[j]=a[r.nextInt(36)];
        }
        for (int i : b) {
            System.out.print(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 bao;

import java.io.IOException;
import java.util.*;
public class Lei {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int[] a = new int[10];
        System.out.println("请输入10个数:");
        for (int i = 0; i < 10; i++) {
            a[i] = input.nextInt();
        }
        int max = a[0], min = a[0], m = 0, n = 0;
        for (int i = 0; i < 10; i++) {
            if (max < a[i]) {
                max = a[i];
            }
            if (min > a[i]) {
                min = a[i];
            }
            if (a[i] % 2 == 0) {
                m++;
            }
            if (a[i] % 2 != 0) {
                n++;
            }
        }
        System.out.println("最大值是:" + max + " 最小值是:" + min + " 奇数的个数是:" + n + " 偶数的个数是:" + m);
    }
}