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

public class homework{

    public static void main(String[] args) {
        double []a=new double[] {9.1,10,8.2,9.5,6.7,6.6,4.2,5.5,6.6,7.7};
        double max=0.0;
        double min=0.0;
        double sum=0.0;
        double everage=0.0;
        for(int i=0;i<a.length-1;i++) {
            if(a[i+1]>a[i]) {
                max=a[i];
                a[i]=a[i+1];
                a[i+1]=max;
            }
        }
        for(int j=0;j<a.length-1;j++) {
            if(a[j+1]<a[j]) {
                min=a[j];
                a[j]=a[j+1];
                a[j+1]=min;
            }    
            sum=sum+a[j];
        }
        everage=(sum-min-max)/(a.length-2);
        System.out.println("最高得分为："+max+"最低得分为："+min+"平均分为："+everage);
    }
}

 

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

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

public class homework{

    public static void main(String[] args) {
        
                int[] a= new int[35];
                Random r=new Random();
                for (int i = 0; i < a.length; i++) {
                    a[i]=r.nextInt(34)+1;
                }
                int[] b=new int[7];
                for (int j = 0; j < 7; j++) {
                    b[j]=a[r.nextInt(36)];
                }
                for (int i : b) {
                    System.out.print(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

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);
    }
}