MSSQL求100-999的水仙花数

代码

   
     

    
      
    
      --
    
      author：【DBA】小七
    
      
--
    
      datatime: 2010-1-20 16:52:00
    
      
--
    
      title:100-999的水仙花数 
    
      

    
      

    
      --
    
      水仙花数：如果三位数的个位的三次方加十位的三次方加上百位的三次方之和为其本身，那么这个数就为水仙花数
    
      

    
      declare
    
       
    
      @a
    
       
    
      int
    
      

    
      set
    
       
    
      @a
    
      =
    
      100
    
      ;

    
      while
    
       
    
      @a
    
      <=
    
      999
    
       

    
      BEGIN
    
      


    
      if
    
       
    
      power
    
      (
    
      substring
    
      (
    
      cast
    
      (
    
      @a
    
       
    
      as
    
       
    
      char
    
      (
    
      3
    
      )),
    
      1
    
      ,
    
      1
    
      ),
    
      3
    
      )
    
      +
    
      

    
      power
    
      (
    
      substring
    
      (
    
      cast
    
      (
    
      @a
    
       
    
      as
    
       
    
      char
    
      (
    
      3
    
      )),
    
      2
    
      ,
    
      1
    
      ),
    
      3
    
      )
    
      +
    
      

    
      power
    
      (
    
      substring
    
      (
    
      cast
    
      (
    
      @a
    
       
    
      as
    
       
    
      char
    
      (
    
      3
    
      )),
    
      3
    
      ,
    
      1
    
      ),
    
      3
    
      )
    
      =
    
      @a
    
       

    
      begin
    
       

    
      print
    
       
    
      @a
    
      

    
      end
    
      

    
      set
    
       
    
      @a
    
      =
    
      @a
    
      +
    
      1
    
      

    
      end