下列存储过程是将传入的二进制数字串转化为十进制数值传出，请完善程序create 1) BintoDec @x char(16), @y int outputas begin declare @i int, @n int,@a char(1) set @n=len(@x) set @y= 2) set @i=1 while @i<= 3) begin set @a=substring(@x,@i,1) set @y=@y*2+ 4) - ascii('0') set @i= 5) endend