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 the;

import java.util.Scanner;

public class newclass {

    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 x = 0; x < a.length; x++) {
            if (a[x] < min) {
                min = a[x];
            }
        }
        for (int y = 0; y < a.length; y++) {
            sum += a[y];
        }
        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 the;

import java.util.Random;

public class newclass {

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

        }
        for (int x = 0; x < a.length; x++) {
            System.out.print(a[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 the;

import java.util.Random;

public class newclass {

    public static void main(String[] args) {
        // TODO Auto-generated method stub        
         int a[] = new int[7];
            Random r = new Random();
            for (int i = 0; i < a.length; i++) {
                a[i] = r.nextInt(35)+1;
            }
            for (int x = 0; x < a.length; x++) {
                System.out.println(a[x]);
            }
    }

}

 

4.定义一个长度为10的int数组,统计数组中的最大值、最小值、以及奇数和偶数的个数

package the;

import java.util.Scanner;

public class newclass {

    public static void main(String[] args) {
        // TODO Auto-generated method stub                
        int max = 0, min = 99;
        int os = 0, js = 0;
        int[] a = { 22, 65, 23, 82, 31, 1, 9, 87, 99, 70 };
        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("最大值:" + max);
        System.out.println("最小值:" + min);
        System.out.println("偶数个数:" + os);
        System.out.println("奇数个数:" + js);
    }
}