# 1.第一个代码：输出语句

# 1.第一个代码：输出语句
print("My dog's name is Huppy!")
print('o----')
print(' ||| ')
print("*" * 10)
"""
输出结果：
My dog's name is Huppy!
o----
 ||| 
**********
"""

# 2.变量

# 2.变量
price = 10
rating = 7.7
name = 'Mosh'
is_True = True
print(price, rating, name, is_True)
"""
输出结果：
10 7.7 Mosh True
注意事项：
Python的变量不需要定义类型
Python严格区分大小写，True不能为小写
"""

练习：输出一个全名叫Ma Baoguo的成年人，年龄18岁，是一个新人

full_name = 'Ma Baoguo'
age = 18
is_new = Ture

# 3.接受与输入

name = input('What is your name? ')
print('My name is ' + name + '.')
"""
输出结果：
What is your name? CDNS
My name is CDNS
"""

练习：你的名字是什么？你住在哪里？

print('What is your name?')
name = input()
print('Where is your address?')
is_address = input()
print('My name is ' + name + '. My address is ' + is_address + '.')

# 4.型号转换

# 4.型号转换
birth_year = input('Birth year: ')  # birth_year是字符型
print(type(birth_year))  # 输出类型 ：<class 'str'>
age = 2023 - int(birth_year)  # Python中的强制类型转换
print(type(int(birth_year)))  # <class 'int'>
print(age)
"""
输出结果：
Birth year: 2000
<class 'str'>
<class 'int'>
23
注意事项：
Python中的强制类型转换是：类型符(变量名)
Python输出语句中字符串不可与数字用 + 连接
"""

练习：输入一个重量（单位：磅）转换为（单位：千克），并输出
注意：1 kg 等于 0.45 lbs

weight_lbs = input('weight_lbs: ')
weight_kg = int(weight_lbs) * 0.45
# print("weight_kg: " + weight_kg)  # TypeError: can only concatenate str (not "float") to str
print("weight_kg: " + str(weight_kg))
print("weight_kg: ", weight_kg)