• 第五周上机


    1. 打印出所有的"水仙花数",所谓"水仙花数"是指一个三位数,其各位数字立方和等于该数本身。例如:153是一个"水仙花数",因为153=1的三次方+5的三次方+3的三次方。(知识点:循环语句、条件语句)

    package book1;
    
    public class five01 {
    
        public static void main(String[] args) {
            // TODO Auto-generated method stub
            for(int i=100;i<1000;i++) {
                int ge=i%10;
                int shi=i/10%10;
                int bai=i/100;
                if(ge*ge*ge+shi*shi*shi+bai*bai*bai==i) {
                    System.out.println(i);
                }
            }
    
        }
    
    }

    2.在控制台输出以下图形(知识点:循环语句、条件语句)

    package book1;
    
    public class asd {
    
        public static void main(String[] args) {
            // TODO Auto-generated method stub
            int i,j;
            for(i=1;i<=6;i++){
             for(j=1;j<=i;j++){
              System.out.print(j);
             }
             System.out.println("");
            }
    
        }
    
    }

    package book1;
    
    public class asd {
    
        public static void main(String[] args) {
            // TODO Auto-generated method stub
            int i,j;
            for(i=6;i>=1;i--){
             for(j=1;j<=i;j++){
              System.out.print(j);
             }
             System.out.println("");
            }
    
        }
    
    }

    package book1;
    
    public class asd {
    
        public static void main(String[] args) {
            // TODO Auto-generated method stub
             for(int i=1;i<=6;i++) {
                    for(int j=i;j>0;j--) {
                        System.out.print(j);
                    }
                    System.out.println(" ");
            }
    
        }
    
    }

    package book1;
    
    public class asd {
    
        public static void main(String[] args) {
            // TODO Auto-generated method stub
            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("");
            }
    
        }
    
    }

    3. 输入年月日,判断这是这一年中的第几天(知识点:循环语句、条件语句)

    package qwe;
    
    import java.util.*;
    
    public class test4 {
        public static void main(String[] args) {
            // TODO Auto-generated method stub
            int day = 0;
            int month = 0;
            int year = 0;
            int sum = 0;
            int a;
            Scanner input = new Scanner(System.in);
            System.out.println("请输入年:");
            year = input.nextInt();
            System.out.println("请输入月:");
            month = input.nextInt();
            System.out.println("请输入日:");
            day = input.nextInt();
            switch (month) {
            case 1:
                sum = 0;
                break;
            case 2:
                sum = 31;
                break;
            case 3:
                sum = 59;
                break;
            case 4:
                sum = 90;
                break;
            case 5:
                sum = 120;
                break;
            case 6:
                sum = 151;
                break;
            case 7:
                sum = 181;
                break;
            case 8:
                sum = 212;
                break;
            case 9:
                sum = 243;
                break;
            case 10:
                sum = 273;
                break;
            case 11:
                sum = 304;
                break;
            case 12:
                sum = 334;
                break;
            default:
                System.out.println("请输入正确的年,月,日!");
                break;
            }
            sum = sum + day;
            if (month >= 0 && month <= 12 && day >= 1 && day <= 31) {
                if (year % 400 == 0 || year % 4 == 0 && year % 100 != 0) {
                    a = 1;
                } else {
                    a = 0;
                }
                if (a == 1 && month > 2) {
                    sum++;
                    System.out.println(year + "年" + month + "月" + day + "号是这一年的第" + sum + "天。");
                } else {
                    System.out.println(year + "年" + month + "月" + day + "号是这一年的第" + sum + "天。");
                }
            }
        }
    }

    4.由控制台输入一个4位整数,求将该数反转以后的数,如原数为1234,反转后的数位4321(知识点:循环语句、条件语句)

    package book1;
    
    import java.util.Scanner;
    
    public class five04 {
    
        public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入一个四位数");
            int n = sc.nextInt();
            int d = n / 1000;
            int c = n / 100 % 10;
            int b = n / 10 % 10;
            int a = n % 10;
            int s = a * 1000 + b * 100 + c* 10 + d;
            System.out.println("反转后数为" + s);
        }
    
    }

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  • 原文地址:https://www.cnblogs.com/wxyailjy/p/12618855.html
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