import java.util.Scanner;
public class Ex
{
public static void main(String[] args)
{
int year,month,day,a=0,b=0;
Scanner reader=new Scanner(System.in);
System.out.println("请输入年份");
year=reader.nextInt();
System.out.println("请输入月份");
month=reader.nextInt();
System.out.println("请输入日");
day=reader.nextInt();
if(month>12||month<=0)
System.out.println("输入的月份有错误,请重新输入;");
else if((month==1||month==3||month==5||month==7||month==8||month==10||month==12)&&day>31)
System.out.println("输入的日期有错误,请重新输入;");
else if((month==4||month==6||month==9)&&day>30)
System.out.println("输入的日期有错误,请重新输入;");
else if((year%4==0&&year%100!=0||year%400==0)&&month==2&&day>29)
System.out.println("输入的日期有错误,请重新输入;");
else if(!(year%4==0&&year%100!=0||year%400==0)&&month==2&&day>28)
System.out.println("输入的日期有错误,请重新输入;");
else {for(int i=1;i<month;i++)
{
switch(i)
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:a=31; break;
case 2:
if(year%4==0&&year%100!=0||year%400==0)
a=29;
else
a=28;
break;
case 4:
case 6:
case 9:
case 11:a=30; break;
}
b=b+a;
}
b=b+day;
System.out.println("这是这一年的第"+b+"天");
}
}
}
输入年月日,显示该天是这一年中的第几天,要求对输入的日期进行合理性检查。
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转载自blog.csdn.net/m0_47305552/article/details/105906158
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