第五周上级作业

import java.util.*;
public class homework 
{
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int x = 0,y = 0,z = 0;
        for(int i = 100;i<1000;i++) {
            x = i/100;
            y = (i%100)/10;
            z = (i%100)%10;
            if(x*x*x + y*y*y +z*z*z == i) {
                System.out.print(i+" ");
            }
        }
    }
}

import java.util.*;
public class homework
{
    public static void main(String[] args) {
        for(int i=1;i<=7;i++) {
            for(int j=1;j<i;j++) {
                System.out.print(j);
            }
            System.out.println();
        }
    }
}

import java.util.*;
public class homework
{
    public static void main(String[] args) {
          for(int i=6;i>=0;i--) {
                for(int j=1;j<=i;j++) {
                    System.out.print(j);
                }
                System.out.println();
            }
        }
    }

import java.util.*;
public class homework 
{
    public static void main(String[] args) {
        for(int i=1;i<7;i++) {
            for(int j=i;j>0;j--) {
                System.out.print(j);
            }
            System.out.println();
        }
    }
}

import java.util.*;
public class homework
{
    public static void main(String[] args) {
          for(int i=6;i>0;i--) {
                for(int k=0;k<6-i;k++) {
                    System.out.print(" ");
                }
                for(int j=1;j<=i;j++) {
                    System.out.print(j);
                }
                System.out.println("");
            }
        }
    }

输入年月日，判断这是这一年中的第几天

package chap1;
import java.util.Scanner;
public class homework {
    public static void main(String[] args){
        int allday = 0;
        int[] days = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
        Scanner read = new Scanner(System.in);
        System.out.print("请输入年月日:");
        String dateStr = read.next();
        String[] dateInt = dateStr.split("/");
        int year = Integer.parseInt(dateInt[0]);
        int month = Integer.parseInt(dateInt[1]);
        int day = Integer.parseInt(dateInt[2]);
        for (int i = 0; i < month - 1; i++) {
            allday += days[i];
        }
        allday += day;
        if ((((year % 4 == 0 && year % 100 == 0) || year % 400 == 0) && month > 2)) {
            allday++;
        }
        System.out.println(month + "月" + day + "是" + year + "年的第" + allday + "天");
    }
}

由控制台输入一个4位整数，求将该数反转以后的数

package chap1;
public class homework{
    public static void main(String[] args){
        System.out.println("请输入一个整数：");
        Scanner input = new Scanner(System.in);
        int num=input.nextInt();
        int result=0;
        while(true)
        {
            int n=num%10;
            result=result*10+n;
            num=num/10;
            if(num==0)
            {
                break;
            }
        }
        System.out.println(result);
    }
 
}