Java编程题练习2017-02-18

最新推荐文章于 2022-11-03 17:12:07 发布

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#java #编程

本文介绍了一个Java程序，该程序通过用户输入的日期（年、月、日），计算并显示这一天是一年中的第几天。程序考虑了平年和闰年的情况，并通过switch-case语句进行了月份天数的累加。

2017-02-18题目：输入某年某月某日，判断这一天是这一年的第几天？

import java.util.Scanner;

public class ru20170218 {

public static void main(String[] args) {
    // TODO Auto-generated method stub
    int y,m,d;  
    int sum=0;  
    int feb=28;  
    Scanner in = new Scanner(System.in);  
    System.out.print("请输入年份:");  
    y = in.nextInt();  
    System.out.print("请输入月份:");  
    m = in.nextInt();  
    System.out.print("请输入几号:");  
    d = in.nextInt();  

    if((y%4==0 && y%100!=0) || y%400==0)  
    {  
        feb = 29;  
    }  

    switch(m)  
        {  
                case 1:  
                    sum = d;  
                    break;  
                case 2:  
                    sum = 31 + d;  
                    break;  
                case 3:  
                    sum = 31+feb+d;  
                    break;  
                case 4:  
                    sum = 31+feb+31+d;  
                    break;  
                case 5:  
                    sum = 31+feb+31+30+d;  
                    break;  
                case 6:  
                    sum = 31+feb+31+30+31+d;  
                    break;  
                case 7:  
                    sum = 31+feb+31+30+31+30+d;  
                    break;  
                case 8:  
                    sum = 31+feb+31+30+31+30+31+d;  
                    break;  
                case 9:  
                    sum = 31+feb+31+30+31+30+31+31+d;  
                    break;  
                case 10:  
                    sum = 31+feb+31+30+31+30+31+31+30+d;  
                    break;  
                case 11:  
                    sum = 31+feb+31+30+31+30+31+31+30+31+d;  
                    break;  
                case 12:  
                    sum = 31+feb+31+30+31+30+31+31+30+31+30+d;  
    }  
    System.out.println(y+" 年 "+m+" 月 " + d + "号是今年的第"+sum+"天");  
}

}