JAVA输入某年某月某日,判断这一天是这一年的第几天?
import java.util.*;
public class judgement{
public static void main(String[]args){
int day=0;
int month=0;
int year=0;
int sum=0;
int leap;
System.out.println("请输入年,月,日");
Scanner input=new Scanner(System.in);
year=input.nextInt();
month=input.nextInt();
day=input.nextInt();
switch(month) /*先计算某月以前月份的总天数*/
{
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("请正确的输入年,月,日");break;
}
sum=sum+day;/*再加上某天的天数*/
if(month>=0&&month<=12&&day>=1&&day<=31)/*判断控制台是否按照年月日正确输入*/
{
if(year%400==0||year%4==0&&year%100!=0)/*判断是否为闰年*/
{ leap=1;
}else{
leap=0;
}
if(leap==1&&month>2)/*如果是闰年且月份大于2,总天数应该加一天*/
{
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。");
}
}
}
}
本文标题:JAVA输入某年某月某日,判断这一天是这一年的第几天?
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