Learn by story and have fun!

### Python code:

#!/usr/bin/python3
import sys
from math import sin,pi,e

# Long long time ago...
'''
There is a King.
He has a Queen.
'''
print("King: Hello, my Queen!")

child1 = "boy"

if child1=="girl":
print("They have a princess.")
elif child1=="boy":
print("They have a prince.")
else:
print("They have a ...")

title = {'boy': 'prince', 'girl': 'princess'}
print('Albert: Yes, I\'m a', title[child1], end='.\n')

print('And There are two princesses.')
class people:
name=''
age=0
intro=''
# One's weight is private.
__weight=0
def __init__(self,n,a,w,s):
self.name = n
self.age = a
self.sex = s
self.__weight = w
def introduce(self):
isOverWeight = ''
if self.__weight < 60:
isOverWeight = 'not '
self.intro = "{}: I'm {} years old and {}overweight.".format(self.name, self.age, isOverWeight)
#print(self.intro)

class royal_student(people):
title = ''
learn = ''
hobby = ''
def __init__(self,n,a,w,s,l,h):
people.__init__(self,n,a,w,s)
self.learn = l
self.title = title[s]
self.hobby = h
def introduce(self):
people.introduce(self)
self.intro = "{} My title is {}. I'm study {}, and I like {}.".format(self.intro, self.title, self.learn, self.hobby)
print(self.intro)

child2 = royal_student('Alice', 22, 59, 'girl', 'math', 'coding')
child2.introduce()
child3 = royal_student('Lily', 18, 69, 'girl', 'art', 'eating')
child3.introduce()

#j = complex(0,-1)
#euler = e**(pi*j) + 1
euler = 0
angle = sin(pi/2)
print('Alice: Math is beautiful. e^(pi*i) + 1 = {}, sin(pi/2) = {}'.format(euler, angle))

seq = 'ANDroiD'
revSeq = seq[::-1]
print('Alice: I am gona write a app for {}(Android) which reverse sequence is {}.'.format(seq, revSeq))

print("Albert: I'm writing our family tree to familyTree.txt.")
f = open("familyTree.txt", "w")
f.write("King Queen\n")
f.write("Lily Alice Albert\n")
f.close()

print("Albert: I'm reading our family tree to you:")
#f = open("familyTree.txt", "r")
with open("familyTree.txt", "r") as f:
for line in f:
print(line.rstrip())

count = 0
i = 1
while i <= 100:
count += i
i += 1
print('Alice: What is the sum of 1 to 100? The answer is {} which calculate by the most stupid but simple coding method.'.format(count))

beer_puzzle = '''
King: Alice, You are so clever, my sweet heart.
I have $10. And$2 can buy 1 bottle of beer.
4 bottle caps can be exchanged for 1 bottle beer.
2 empty bottles can be exchanged for 1 bottle of beer.
So, how many bottles of beer can I drink?
I will make you the next Queen if you give the correct answer.
'''
print(beer_puzzle)
money, bottles, caps = 10, 0, 0
count = 0
def drinkAndExchange(money, bottles, caps):
global count
Round = 0
# drink & exchange
Round += money // 2
money = money % 2
Round += bottles // 2
bottles = bottles % 2
Round += caps // 4
caps = caps % 4
# count
if Round == 0:
return count
bottles += Round
caps += Round
count += Round
#print("count: ", count)

return drinkAndExchange(money, bottles, caps)

bottles_count = drinkAndExchange(money, bottles, caps)

print('You can drink {} bottles, dady.'.format(bottles_count))

print('Sorry, darling, but I can only drink 2 bottles atmost.')

print('\n---\n' + 'The story is written on', sys.platform + '.')

### Run story.py, Output Story:

• King: Hello, my Queen!
• They have a prince.
• Albert: Yes, I’m a prince.
• And There are two princesses.
• Alice: I’m 22 years old and not overweight. My title is princess. I’m study math, and I like coding.
• Lily: I’m 18 years old and overweight. My title is princess. I’m study art, and I like eating.
• Alice: Math is beautiful. e^(pi*i) + 1 = 0, sin(pi/2) = 1.0
• Alice: I am gona write a app for ANDroiD(Android) which reverse sequence is DiorDNA.
• Albert: I’m writing our family tree to familyTree.txt.
• Albert: I’m reading our family tree to you:

King Queen
Lily Alice Albert

• Alice: What is the sum of 1 to 100? The answer is 5050 which calculate by the most stupid but simple coding method.

• King: Alice, You are so clever, my sweet heart.

I have $10. And$2 can buy 1 bottle of beer.
4 bottle caps can be exchanged for 1 bottle beer.
2 empty bottles can be exchanged for 1 bottle of beer.
So, how many bottles of beer can I drink?

• I will make you the next Queen if you give the correct answer.

^_^: You can drink 15 bottles, dady.
XD: Sorry, darling, but I can only drink 2 bottles atmost.

The story is written on linux.