1 #!/usr/bin/env python
2 # -*- coding:utf-8 -*-
3 #例子1
4 username = input("请输入命令：")
5 password = input("请输入密码：")
6
7 if username == "lipc" and password == 123:
8 print("登陆成功")
9 else:
10 print("登陆失败")
11
12
13 #例子2
14 fen = int(input("请输入你的成绩："))
15 if 0 < fen <= 59:
16 print("不及格")
17 elif 60 <= fen <= 79:
18 print("较好")
19 elif 80 <= fen <= 99:
20 print("优秀")
21 elif fen == 100:
22 print("满分")
23 else:
24 print("无效的输入")
25
26
27 #例子3
28 year = int(input("请输入年："))
29 month = int(input("请输入月份："))
30 if month == 1 or month == 3 or month == 5 or month == 7 or month == 8 or month == 10 or month == 12:
31 print("此月有 31 天。")
32 elif month == 4 or month == 6 or month == 9 or month == 11:
33 print("此月有 30 天。")
34 elif month == 2 and ((year % 4==0 and year % 100!=0) or (year % 400==0)):
35 print('29天')
36 else:
37 print('28天')
