要求:
键盘输入年、月、日,判断这是那一年的第几天?
判断闰年标准:
1)可以被4整除,但不能被100整除
2)可以被400整除
import java.util.Scanner;
class Test4{
public static void main(String[] args){
//实例化对象
Scanner input = new Scanner(System.in);
System.out.println("请输入year");
int year = input.nextInt();
System.out.println("请输入month");
int month = input.nextInt();
System.out.println("请输入day");
int day = input.nextInt();
//记录总天数
int sumDay = 0;
switch(month){
case 12:
sumDay += 30;
case 11:
sumDay += 31;
case 10:
sumDay += 30;
case 9:
sumDay += 31;
case 8:
sumDay += 31;
case 7:
sumDay += 30;
case 6:
sumDay += 31;
case 5:
sumDay += 30;
case 4:
sumDay += 31;
case 3:
// 判断是否是闰年
if((year % 4 == 0 && year % 100 !=0) || year % 400 == 0){
sumDay += 29;
}
else{
sumDay += 28;
}
case 2:
sumDay += 31;
case 1:
sumDay += day;
}
System.out.println(year + "年" + month + "月" + day + "日是" + year + "年的第" + sumDay + "天");
}
}