2020.10.16日作业

第七题

package tes;

import java.util.Scanner;

public class Demo1 {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入一个三位数");
        int i=scanner.nextInt();
        isSXH(i);
    }
    public static void isSXH(int num){
        int a=num%10,b=num/10%10,c=num/100;
        if ((a*a*a)+(b*b*b)+(c*c*c)==num) {
            System.out.println(num+"为水仙花数");
        }else {
            System.out.println(num+"不是水仙花数");
        }
    }
}

第八题

package tes;

import java.util.Scanner;

public class Demo2 {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入第一个整数");
        int a =scanner.nextInt();
        System.out.println("请输入第二个整数");
        int b =scanner.nextInt();
        System.out.println("请输入您要进行的运算(0:表示加法运算,1:表示减法运算,2:表示乘法运算,3:表示除法运算)");
        int c =scanner.nextInt();
        switch (c){
            case 0:
                System.out.println(a+"+"+b+"="+(a+b));
                break;
            case 1:
                System.out.println(a+"-"+b+"="+(a-b));
                break;
            case 2:
                System.out.println(a+"*"+b+"="+(a*b));
                break;
            case 3:
                System.out.println(a+"/"+b+"="+(a/b));
                break;
        }
    }
}

第九题

package tes;

import java.util.Random;

public class Demo3 {
    public static void main(String[] args) {
        int arr[]=new int[5];
        int arr1[]=new int[5];
        Random random=new Random();
        for (int i = 0; i <arr.length ; i++) {
            arr[i]=random.nextInt((50)+1)*2;
            arr1[i]=random.nextInt((50)+1)*2;

        }
        hebin(arr,arr1);
    }
    public static  void hebin(int[]arr,int []arr1){
        int a[]=new int[arr.length+arr1.length];
        for (int i = 0; i <arr.length ; i++) {
            a[i]=arr[i];
        }
        for (int i = 0; i <arr1.length ; i++) {
            a[arr.length+i]=arr[i];
        }
        for(int i:a
        ){
            System.out.print(i+",");
        }
    }
}

第十题

package tes;

import java.util.ArrayList;
import java.util.Scanner;

public class Demo4 {
    public static void main(String[] args) {
        ArrayList<Integer>list=new ArrayList<>();
        Scanner scanner=new Scanner(System.in);
        for (int i = 0; i <5 ; i++) {
            int s =scanner.nextInt();
            list.add(s);
        }
        int sum=0;
        for(int i:list
        ){
            if(i>10){
                System.out.print("大于10"+i);
                sum+=i;
            }
        }
        System.out.println("总和"+sum);
    }


}

第十一题

package tes;

import java.util.ArrayList;
import java.util.Random;

public class Demo5 {
    public static void main(String[] args) {
        Random random=new Random();
        ArrayList<Integer>list=new ArrayList<>();
        for (int i = 0; i <10 ; i++) {
            list.add(random.nextInt(100));

        }
        ArrayList<Integer>list1 =list(list);
        for (int i:list1
        ){
            System.out.print(i+",");
        }
    }
    public static  ArrayList<Integer>list(ArrayList<Integer>list){
        ArrayList<Integer>list1=new ArrayList<>();
        for (int i:list
        ){
            if (i<50){
                list1.add(i);
            }
        }
        return list1;
    }
}

第十二题

package tes;

import java.util.ArrayList;

public class Demo6 {
    public static void main(String[] args) {
        ArrayList<Integer> list=new ArrayList<Integer>();
        list.add(11);
        list.add(22);
        list.add(55);
        list.add(66);
        list.add(77);
        list.add(88);
        for (int i = 0; i <list.size() ; i++) {
            if (list.get(i)>60){
                list.remove(list.get(i));
                i--;
            }
        }
        System.out.println(list);
    }
}

第十三题

package tes;

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

public class Demo7 {
    public static void main(String[] args) {
        int arr[]=new int[5];
        Random random=new Random();
        for (int i = 0; i <arr.length ; i++) {
            arr[i]=random.nextInt(100)+1;
        }
        System.out.print("随机生成的数组元素为:");
        for(int i:arr
        ){
            System.out.print(i+"");
        }
        System.out.print("请输入2-5之间的一个数字");
        Scanner scanner=new Scanner(System.in);
        int num= scanner.nextInt();
        System.out.print("符合条件的元素为：");
        for(int i:arr
        ){
            if (i%num == 0) {
                System.out.print(i+"");
            }
        }
    }
}