输入：以十进制的形式读入要判断的年份，从键盘取得的一个十进制数转换为二进制数存入BX寄存器中，再将BX中的内容保存在变量year中。

　　判断：首先将year中的内容首先除以4，不能被4整除，则一定不是闰年，能被4整除的，需再将year中的内容除以100，不能被100整除的，则一定是闰年，能被100整除的，需再将year中的内容除以400，能被400整除的，则是闰年，不能被400整除的，则不是闰年。

　　输出：经判断后，是闰年的输出“This is a leap year!”，不是闰年的则输出“

This is not a leap year! ”，然后输出是否要继续判断另一年份是否是闰年的提示字符串“ Continue jugding(y/n)?”，输入‘y’，则输入要判断的年份，输入其它字符则结束程序。

-input : in the metric system in the form of reading the judgment of the Year, from the keyboard of a decimal to binary number into BX register, BX then the content stored in the variables which year. Judgment : the first year of the contents of the first four dividing, not divisible by four, then it is definitely not a leap year, can be divisible by four. need further year divided by the content of 100, can not be divisible by 100, it must be a leap year, be divisible by 100, then take the year divided by 400 elements, be divisible by 400, it is a leap year, can not be divisible by 400, it is not a leap year. Output : judgment, the output is a leap year, "This is a leap year!" , it is not a leap year the output "This is not a leap year!" , Output then judge whether to c