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。

package work;

import java.util.*;

public class HomeWork {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int[] a = new int[10];
        System.out.println("请输入10位评委的分数:");
        for (int i = 0; i < 10; i++) {
            a[i] = input.nextInt();
        }
        int max, min, sum;
        max = a[0];
        min = a[0];
        sum = 0;
        for (int i = 0; i < 10; i++) {
            if (max < a[i]) {
                max = a[i];
            }
            if (min > a[i]) {
                min = a[i];
            }
            sum = sum + a[i];
        }
        int aver;
        aver = (sum - max - min) / 8;
        System.out.println("去掉最高分和最低分后的平均分是:" + aver);
    }
}

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 work;

import java.util.Random;

public class HomeWork {

    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 work;

import java.util.Random;

public class HomeWork {

    public static void main(String[] args) {
        int[] a = new int[7];
        Random r = new Random();
        for (int i = 0; i < 7; i++) {
            a[i] = r.nextInt(35) + 1;
        }
        System.out.println("随机生成的数为:");
        for (int i = 0; i < 7; 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 work;

import java.util.*;

public class HomeWork {

    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);
    }
}