题解 | 计算一年中的第几天

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {

    static  int[] days = new int[]{31,28,31,30,31,30,31,31,30,31,30,31};

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while(in.hasNextInt()) {
            int year = in.nextInt();
            int month = in.nextInt();
            int day = in.nextInt();
               processData(year, month, day);  
        }
         
    }

    private static void processData(int year, int month, int day) {
        int sum = 0 + day ;
        for(int i=0; i< month - 1; i++) {
            sum +=days[i];
        }
        if(month < 3) {
            System.out.println(sum);
            return;
        }
        if(isRunYear(year)) {
            sum++;
        }
         System.out.println(sum);
       
    }

    private static boolean isRunYear(int year) {
    if(year % 4 == 0 && year % 100 != 0) {
                return true;
            }
        if(year % 400 == 0) {
                return true;
            }    
            return false;
    }
}