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java基礎語法練習--輸入年月日確定星期幾

基礎語法練習不能少
package test;


import java.util.Scanner;
public class aa{
      public static void main (String[]args){
          System.out.println("今年是哪年?");
       Scanner reader = new Scanner(System.in);
        int x = reader.nextInt();
        int a=0,b=0,c=0,d=0,i=1;
        c=x-1;
        a=365*c ;
        for(i=1;i<=c;i++)
           {
        	//計算出x-1年的天數,考慮閏年
            if ((i%4==0&i%100!=0)||i%400==0){
                                             b=b+1;
                                            }
             a=a+b;
           }    
        //System.out.println(a);
         System.out.println("今天是幾月?");
        Scanner book = new Scanner (System.in);
        int q = book.nextInt();
        int t=q-1;
        switch(t)
      {
       case 0:d=0;break;
       case 1:d=31;break;
       case 2:d=31+28;break;
       case 3: d=31+28+31;break;
       case 4:d=31+28+31+30;break;
       case 5: d=31+28+31+30+31;break;
       case 6: d=31+28+31+30+31+30;break;
       case 7: d=31+28+31+30+31+30+31;break;
       case 8: d=31+28+31+30+31+30+31+31;break;
       case 9: d=31+28+31+30+31+30+31+31+30;break;
       case 10: d=31+28+31+30+31+30+31+31+30+31;break;
       case 11: d=31+28+31+30+31+30+31+31+30+31+30;break;
        
       }
        a=a+d;
        //System.out.println(a);
       System.out.println("今天是幾號?");
       Scanner look = new Scanner(System.in);
         int w = reader.nextInt();
        a=a+w;
        //計算今年天數,考慮閏年情況
       if (((x%4==0&x%100!=0)||x%400==0)&q==2)
          a=a+1;
         //System.out.println(a);
       int h;
       //判斷星期幾
       h=a%7;
       if(h==0)
       {
    	   System.out.println("輸入的日期是星期天");
       }
       else{
    	   System.out.println ("輸入的日期是星期"+h);
    	   }
  
        }
}