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 test1;
import java.util.*;
public class finish {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int a[] = new int[10];
        int sum = 0, max = 0, min = 1000;
        System.out.println("请输入分数");
        for (int i = 0; i < a.length; i++) {
            Scanner input = new Scanner(System.in);
            a[i] = input.nextInt();
        }
        for (int j = 0; j < a.length; j++) {
            if (a[j] > max) {
                max = a[j];
            }
        }
        for (int m = 0; m < a.length; m++) {
            if (a[m] < min) {
                min = a[m];
            }
        }
        for (int n = 0; n < a.length; n++) {
            sum += a[n];
        }
        System.out.println("平均分是" + (sum -max-min)/ 8.0);
    }
}

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 test1;

import java.util.Scanner;
import java.util.Random;

public class finish {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int arr[] = new int[10];
        Random r = new Random();
        for (int i = 0; i < arr.length; i++) {
            arr[i] = r.nextInt(100);
        }
        for (int i = 0; i < arr.length - 1; i++) {
            for (int n = 0; n < arr.length - 1 - i; n++) {
                if (arr[n] > arr[n + 1]) {
                    int c = arr[n];
                    arr[n] = arr[n + 1];
                    arr[n + 1] = c;
                }
            }

        }
        for (int x = 0; x < arr.length; x++) {
            System.out.print(arr[x] + " ");
        }
    }
}

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 test1;

import java.util.Random;

public class finish {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int[] a = new int[7];
        Random b = new Random();
        for (int i = 0; i < 7; i++) {
            a[i] = b.nextInt(35) + 1;
            for (int j = 0; j < i; j++) {
                if (a[j] == a[i]) {
                    i--;
                }
            }
        }
            System.out.println("35选7的号码为：");
        for (int i = 0; i < a.length; i++) {
            System.out.println(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 test1;
public class finish {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int max=0,min=99;
        int os=0,js=0;
        int []a={94,2,35,67,19,98,42,37,11,72};
        for (int i = 0; i < a.length; i++) {
            if (a[i]< min) {
                min = a[i];
            }
            if (a[i] > max) {
                max = a[i];
               }
        }
        for (int i = 0; i < a.length; i++) {
            if (a[i]%2==0) {
                os++;                
            }else{
                js++;
            }
        }
        System.out.println("偶数出现的次数:" + os);
        System.out.println("奇数出现的次数:" + js);
        System.out.println("最大值:" + max);
        System.out.println("最小值:" + min);
    }
}