java——万年历

 package oop;

 import java.util.Scanner;

 public class 万年历 {
     public static void main(String[] args) {
         // TODO 自动生成的方法存根
         int zy=0;//年份天数
         int yy=0;//月份天数
         Scanner s = new Scanner(System.in);
         System.out.println("请输入年份");
         int year = s.nextInt();
         System.out.println("请输入月份");
         int money = s.nextInt();
         System.out.println("总天数：");
         //计算总天数
         for (int i = 1900; i <year; i++) {
             if(i/400==0||(i%4==0&&i%100!=0)) {
                 zy+=366;
             }else {
                 zy+=365;
             }
         }
         //计算月数
         for (int i = 1; i < money; i++) {
             switch (i) {
             case 1:
             case 3:
             case 5:
             case 7:
             case 8:
             case 10:
             case 12:
                 yy+=31;
                 break;
             case 2:
                 if(year/400==0||(year%4==0&&year%100!=0)) {
                     yy+=28;
                 }else {
                     yy+=29;
                 }
                 break;
             case 4:
             case 6:
             case 9:
             case 11:
                 yy+=30;
                 break;
             default:
                 return;
             }
         }
         System.out.println(zy+yy);
         int num=0;//空格数
         num=1+(zy+yy)%7;
         System.out.println("星期日\t星期一\t星期二\t星期三\t星期四\t星期五\t星期六\t");
         for (int i = 0; i < num; i++) {
             System.out.print("\t");
         }
         for (int i = 1; i < 31; i++) {
             System.out.print(i+"\t");
             if((num+i)%7==0) {
                 System.out.println();
             }
         }

     }
 }