闰年小工具规则：
1、被4整除不被100整除
2、被400整除
闰年代码
- guess = input('输入一个年份，我给你算算：')
- while not guess.isdigit():
- guess =input('您输入的类型不对，请重新输入：')
- guesss = int(guess)
- if guesss/400 == int(guesss/400):
- print(guesss,' 是闰年')
- elif (guesss/4 == int(guesss/4)) and (guesss/100 != int(guesss/100)):
- print(guesss,' 是闰年')
- else:
- print(guesss,' 不是闰年')
知识结构
- 输入判断 （见：http://www.lijinlong.cc/python/pyxt/1353.html）
- 比较运算符
- 逻辑运算符