import java.util.Scanner;
public class Demo16 {
/*
* 使用switch选择结构实现判断某年某月某日是这一年的第几天?
*/
public static void main(String[] args) {
Demo16 dm = new Demo16();
Scanner sc = new Scanner(System.in);
System.out.println(“请输入年月日如:2000 01 01”);
int year = sc.nextInt();
int month = sc.nextInt();
int day = sc.nextInt();
int sumDay = 0;
for (int i = 1; i < month; i++) {
//System.out.println(“getDaysOfMonth:”+i+”\t”+dm.getDaysOfMonth(year,i));
sumDay+=dm.getDaysOfMonth(year,i);
//System.out.println(sumDay);
}
System.out.println(“该日是该年第”+(sumDay+day)+”天”);
}
public int getDaysOfMonth(int year, int month) {
switch (month) {
case 1:
return 31;
case 2:
if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0)) {
return 29;
} else {
return 28;
}
case 3:
return 31;
case 4:
return 30;
case 5:
return 31;
case 6:
return 30;
case 7:
return 31;
case 8:
return 31;
case 9:
return 30;
case 10:
return 31;
case 11:
return 30;
case 12:
return 31;
default:
return 0;
}
}
}