第五次上机作业

1.有10个评委打分,(去掉一个最高一个最低)求平均分。

package com.run.test;

import java.util.Random;

public class One {
 
    public static void main(String[] args) {
        Random r=new Random();
        int [] a=new int[10];
        for (int i = 0; i < a.length; i++) {
            int s=r.nextInt(11);
            a[i]=s;
        }
        int sum=0;
        int max=a[0],min=a[0];
        for (int i = 0; i < a.length; i++) {
            System.out.print(a[i]+" ");
         sum += a[i];
             if (max<a[i]) {
                max=a[i];
            }
             if (min>a[i]) {
                min=a[i];
            }
        }
        System.out.println();
        System.out.println((sum-max-min)/(a.length-2));
    } 

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.run.test;

import java.util.Random;

public class One {
 
    public static void main(String[] args) {
        Random r=new Random();
        int [] a=new int[10];
        for (int i = 0; i < a.length; i++) {
            int s=r.nextInt(100);
            a[i]=s;
        }
        for (int i = 0; i < a.length-1; i++) {
            for (int j = 0; j < a.length; j++) {
                if (a[j]<a[i]) {
                    int temp=a[i];
                    a[i]=a[j];
                    a[j]=temp;
                }
            }
        }
        for (int i : a) {
            System.out.print(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.run.test;

import java.util.Random;

public class One {
 
    public static void main(String[] args) {
        Random r=new Random();
        int [] a=new int[35];
        for (int i = 0; i < a.length; i++) {
            a[i]=i+1;
        }
        for (int i = 0; i < a.length; i++) {
            int b=r.nextInt(35);
            int c=a[a.length-i-1];
            a[a.length-i-1]=a[b];
            a[b]=c;
            
        }
        for (int i = 0; i < 7; i++) {
            System.out.print(a[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 com.run.test;

import java.util.Random;

public class One {
 
    public static void main(String[] args) {
        Random r=new Random();
        int [] a=new int[10];
        for (int i = 0; i < a.length; i++) {
            int b=r.nextInt(100);
            a[i]=b;
        }
        for (int i = 0; i < a.length; i++) {
            System.out.print(a[i]+" ");
        }
        int max=a[0],min=a[0];
        for (int i = 0; i < a.length; i++) {
            if (max<a[i]) {
                max=a[i];
            }
             if (min>a[i]) {
                min=a[i];
            }
        }
        int x=0,n=0,j=0,o=0;
        for (int i = 0; i < a.length; i++) {
            if (a[i]==max) {
                x++;
            }
            if (a[i]==min) {
                n++;
            }
            if(a[i]%2==0&&a[i]!=0) {
                o++;
            }
            if (a[i]%2!=0) {
                j++;
            }
        }
        System.out.println();
        System.out.println("最大值个数"+x);
        System.out.println("最小值个数"+n);
        System.out.println("偶数个数"+o);
        System.out.println("奇数个数"+j);
    } 
 
}