JAVA小程序（0级）-- 万年历_寿星万年历 java

package 万年历;
//传说中的万年历；
import java.util.Scanner;
 
public class A {
 
	public static void main(String[] args) {
		Scanner in=new Scanner(System.in);
		System.out.println("请输入你要查询的年");
		int year=in.nextInt();
		System.out.println("请输入你要查询的月");
        int month=in.nextInt();
        if(year%100!=0&&year%4==0||year%400==0){
            System.out.println("这年有366天");
        }else{
        	System.out.println("这年有365天");
        }
        int md=31;
        switch(month){
        case 1:
    		System.out.println("这个月有31天");
    		md=31;
    		break;
        case 2:
        	
        	if(year%100!=0&&year%4==0||year%400==0){
        		System.out.println("这个月有29天");
        		md=29;
        	}else{
    		    System.out.println("这个月有28天");
    		    md=28;
        	}
    		break;
        case 3:
    		System.out.println("这个月有31天");
    		md=31;
    		break;
        case 4:
    		System.out.println("这个月有30天");
    		md=30;
    		break;
        case 5:
    		System.out.println("这个月有31天");
    		md=31;
    		break;
        case 6:
    		System.out.println("这个月有30天");
    		md=30;
    		break;
        case 7:
    		System.out.println("这个月有31天");
    		md=31;
    		break;
        case 8:
    		System.out.println("这个月有31天");
    		md=31;
    		break;
        case 9:
    		System.out.println("这个月有30天");
    		md=30;
    		break;
        case 10:
    		System.out.println("这个月有31天");
    		md=31;
    		break;
        case 11:
    		System.out.println("这个月有30天");
    		md=30;
    		break;
        case 12:
    		System.out.println("这个月有31天");
    		md=31;
    		break;
        }
      // System.out.println(md); 
        int day=0;
        for(int i=1900;i<year;i++){
            if(year%100!=0&&year%4==0||year%400==0){
            	day+=366;
            }else{
            	day+=365;
            }
        }
        for(int j=1;j<=month;j++){
            if(j==2){
               if(year%100!=0&&year%4==0||year%400==0){
                	 day+=29;
                 }else{
                	 day+=28;
                 }
             }else{
                if(j==1||j==3||j==5||j==7||j==8||j==10||j==12){
                     day+=31;
                }else{
                	 day+=30;
                	 }
                 }
             }
        System.out.println("有"+day+"天");
        day-=md-1;
        System.out.println(day);
        System.out.println("日\t一\t二\t三\t四\t五\t六\t");
        int weekday=day%7;
        //System.out.println(weekday);
        for(int i=1;i<=weekday;i++){
        	System.out.print("\t");     	
        }
        for(int i=1;i<=md;i++){
        	if(day%7==6){
        		System.out.print(i+"\n");
        	}else{
        		System.out.print(i+"\t");
        	}
        	day++;
        }
        }
	}