高级编程技术第三周平时作业

高级编程技术第三周平时作业

5-2 更多条件测试：

print('dog' == 'cat')
print('dog' == 'dog')
print()
print('Dog' == 'dog')
print('Dog'.lower() == 'dog')
print()
print(11 == 11)
print(11 != 11)
print(12 > 11)
print(12 < 11)
print(22 >= 21)
print(22 <= 21)
print()
print(1 > 2 and 2 > 1)
print(2 > 1 and 3 > 2)
print(1 > 2 or 2 > 1)
print((3 > 2 and 2 > 3) or 3 < 2)
print()
numbers = [1, 2, 3, 4, 5]
print(1 in numbers)
print(6 in numbers)
print()
print(1 not in numbers)
print(6 not in numbers)

5-6 人生的不同阶段：

age = 20
if age < 0:
    print('年龄不应该为负')
elif age < 2:
    print('婴儿')
elif age < 4:
    print('蹒跚学步')
elif age < 13:
    print('儿童')
elif age < 20:
    print('青少年')
elif age < 65:
    print('成年人')
else:
    print('老年人')

5-8 以特殊方式跟管理员打招呼：

users = ['Tom', 'admin', 'Jerry', 'Mary']
for user in users:
    if user == 'admin':
        print('Hello admin, Would you like to see a status report?')
    else:
        print('Hello ' + user + ', thank you for logging in again')

5-9 处理没有用户的情形：

users = ['Tom', 'admin', 'Jerry', 'Mary']
for user in users:
    if user == 'admin':
        print('Hello admin, Would you like to see a status report?')
    else:
        print('Hello ' + user + ', thank you for logging in again')
if not users:
    print('We need to find some users')
users.clear()
print()
if not users:
    print('We need to find some users')

5-11 序数:

numbers = list(range(1, 10))
for number in numbers:
    if number == 1:
        print('1st')
    elif number == 2:
        print('2nd')
    elif number == 3:
        print('3rd')
    else:
        print(str(number) + 'th')