第七周上机练习

1.有10个评委打分,(去掉一个最高一个最低)求平均分。

package sss;

public class khzy {
    public static void main(String[] args) {
        // TODO Auto-generated method stubint 
        int a[] = {1,2,2,4,5,6,5,8,8,10};
        int q = 0;
        for (int i = 0; i < a.length; i++) {
            for (int j = 0; j < a.length; j++) {
                int temp = 0;
                if (a[i]>a[j]) {
                    temp=a[i];
                    a[j]=temp;
                    break;
                }
            }
        }
        a[0]=0;
        a[9]=0;
        for (int x = 0; x < a.length; x++) {
            q=a[x]+q;
        }
        q=q/8;
        System.out.println("平均分是：" + q);
    }
}

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。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 sss;
import java.util.Random;
public class khzy {
    public static void main(String[] args) {
        // TODO Auto-generated method stubint 
        int[] a = new int[10];
        Random r=new Random();
        for (int i = 0; i < a.length; i++) {
            a[i]=r.nextInt(100);
        }
        int t;
        for (int i = 0; i < a.length - 1; i++) {
            for (int j = 0; j < a.length-1-i; j++) {
                if (a[j + 1] > a[j]) {
                    t = a[j];
                    a[j] = a[j + 1];
                    a[j + 1] = t;
                }
            }
        }
        for (int i : a) {
            System.out.println(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 sss;
import java.util.Random;
public class khzy {
    public static void main(String[] args) {
        // TODO Auto-generated method stubint 
         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,统计数组中的最大值、最小值、以及奇数和偶数的个数

package sss;
import java.util.Random;
public class khzy {
    public static void main(String[] args) {
        // TODO Auto-generated method stubint 
        int[] arr = { 34,56,34,33,25,2,7,899,56,12 };
        int max = arr[0];
        int min = arr[0];
        int ou = 0;
        for (int i = 0; i < arr.length; i++) {
            if (max < arr[i]) {
                max = arr[i];
            }
            if (min > arr[i]) {
                min = arr[i];
            }
            if (arr[i] % 2 == 0) {
                ou++;
            }
        }
        System.out.println("最大值" + max);
        System.out.println("最小值" + min);
        System.out.println("偶数有" + ou);
        System.out.println("奇数有" + (10 - ou));
    }
}