上机

1.有10个评委打分,(去掉一个最高一个最低)求平均分。

package come.itheima01;

public class Sz {
      public static void main(String[] args)
        {
            int[] score = new int[]{10, 20, 30, 40, 50, 60, 70, 80, 90, 100};
            for (int i = 0; i < score.length - 1; i++)
            {
                for (int j =0; j < score.length - 1 - i; j++)
                {
                    if (score[j] > score[j + 1])
                    {
                        int tmp = score[j];
                        score[j] = score[j + 1];
                        score[j + 1] = tmp;
                    }
                }
            }
            int sum = 0;
            for (int i = 1; i < score.length - 1; i++)
            {
                sum += score[i];
            }
            System.out.println("平均分为:" + sum / (score.length - 2.0));
        }
    }

 

 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 come.itheima01;
import java.util.Random;
public class Sz {
     public static void main(String[] args)
        {
            int[] score = new int[10];
            Random r = new Random();
            for (int i = 0; i < score.length; i++)
            {
                score[i] = r.nextInt(100);
            }
            for (int i = 0; i < score.length - 1; i++)
            {
                for (int j =0; j < score.length - 1 - i; j++)
                {
                    if (score[j] > score[j + 1])
                    {
                        int tmp = score[j];
                        score[j] = score[j + 1];
                        score[j + 1] = tmp;
                    }
                }
            }
            for (int i = 0; i < score.length; i++)
            {
                System.out.println(score[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 come.itheima01;
import java.util.Random;
public class Sz {
      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 come.itheima01;
import java.util.Random;
public class Sz {
     public static void main(String[] args)
        {
            int[] score = new int[10];
            Random r = new Random();
            for (int i = 0; i < score.length; i++)
            {
                score[i] = r.nextInt(100);
            }
            System.out.println("原数组为:");
            for (int i = 0; i < score.length; i++)
            {
                System.out.println(score[i]);
            }
            for (int i = 0; i < score.length - 1; i++)
            {
                for (int j =0; j < score.length - 1 - i; j++)
                {
                    if (score[j] > score[j + 1])
                    {
                        int tmp = score[j];
                        score[j] = score[j + 1];
                        score[j + 1] = tmp;
                    }
                }
            }
            int ji = 0, ou = 0;
            for (int i = 0; i < score.length; i++)
            {
                if (score[i] % 2 == 0)
                {
                    ou++;
                }
                else
                {
                    ji++;
                }
            }
            System.out.println("最小值为:" + score[0]);
            System.out.println("最大值为:" + score[score.length - 1]);
            System.out.println("奇数个数:" + ji);
            System.out.println("偶数个数:" + ou);
        }
    }