JAVA-2-DATA

import java.util.*;

public class Ch0310 {

public static void main(String[] args) {
// TODO 自动生成的方法存根
Scanner in = new Scanner(System.in);
System.out.println("输入年份：");
int year = in.nextInt();
System.out.println("输入月份：");
int month = in.nextInt();
System.out.println("输入日期：");
int day = in.nextInt();

int a = day;
for (int i = 0; i < month; i++) {

switch (i) {
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
a += 31;
break;
case 4:
case 6:
case 9:
case 11:
a += 30;
break;
case 2:
if (year % 100 != 0 && year % 4 == 0 || year % 400 == 0) {
a += 29;
} else {
a += 28;
}
break;
default:
break;
}

}
System.out.println(year + "年" + month + "月" + day + "日是这年的第" + a + "天");
in.close();
}
}