Java编程——输入某年某月某日,判断这一天是这一年的第几天?


package date;
import java.util.*;

public class Date {
  public static void main(String[] args) {
    int year, month, day;
    int days = 0;
    int d = 0;
    int e;
    input fymd = new input();
    do {
        e = 0;
        System.out.print("输入年:");
        year =fymd.input();
        System.out.print("输入月:");
        month = fymd.input();
        System.out.print("输入天:");
        day = fymd.input();
        if (year < 0 || month < 0 || month > 12 || day < 0 || day > 31)

        {
          System.out.println("输入错误,请重新输入!");
          e=1 ;
        }
       }while( e==1);
    for (int i=1; i <month; i++)

    {
      switch (i)

      {
        case 1:
        case 3:
        case 5:
        case 7:
        case 8:
        case 10:
        case 12:days = 31;break;
        case 4:
        case 6:
        case 9:
        case 11:days = 30;break;
        case 2:if ((year % 400 == 0) || (year % 4 == 0 && year % 100 != 0))

            {
              days = 29;
            }

            else

            {
              days = 28;
            }
            break;
          }
          d += days;
        }
        System.out.println(year + "-" + month + "-" + day + "是这年的第" + (d+day) + "天。");
      }
    }
class input{
  public int input()

  {
    int value = 0;
    Scanner s = new Scanner(System.in);
    value = s.nextInt();
    return value;
  }
}

 

 

posted on 2017-11-12 23:16  小星_log  阅读(3260)  评论(0编辑  收藏  举报