第3章 python实战例子 第一节

第3章

1、实战例子

#Craps Roller

#演示随机数的生成

import random #载入随机数模块

#生成1到6之间的随机数

die1 = random.randint(1,6) #randint()函数是用来产生随机数

die2 = random.randrange(6) + 1 #randrange()函数是用来产生一个随机整数,这里加1会得到die2的1-6正确值

total = die1 + die2

print("You rolled a",die1,"and a",die2, "for a total of",total)

print("\n\nPress the enter key to exit.")

2、实战例子

#Password

#演示if语句

print("Welcome to System Security Inc.")

print("-- where security is our middle name\n")

password = input("Enter your password:")

if password == "secret":

#输入正确的密码才能得到以下两行.

print("Access Granted")

print("Welcome! You must be someone very important.")

input("\n\nPress the enter key to exit.")

3、实战例子

#Password

#演示else语句

print("Welcome to System Security Inc.")

print("-- where security is our middle name\n")

password = input("Enter your password:")

if password == "secret":

#输入正确的密码才能得到以下两行.

print("Access Granted")

print("Welcome! You must be someone very important.")

else:

print("Access Denied")

input("\n\nPress the enter key to exit.")

4、实战例子

#Mood Computer

#演示elif子句

import random

print("I sense your energy. Your true emotions are coming across my screen.")

print("You are...")

mood = random.randint(1,3)

if mood == 1:

print("""

╔╗　　　　　　　　　　　　　

║╚╗╔═╗╔═╗╔═╗╔╦╗

║║║║═║║║║║║║║║║

╚╩╝╚╩╝║╔╝║╔╝╠═║

　　　　　　╚╝　╚╝　╚═╝

""")

elif mood == 2:

print("""

　　　　　　　　　　　　　　　　　　╔╗

╔═╗╔═╗╔═╗╔═╗╔╦╗╔═╗║║

║║║║╩╣║║║║╩╣║╔╝║═║║║

╠╗║╚═╝╚╩╝╚═╝╚╝　╚╩╝╚╝

╚═╝　　　　　　　　　　　　　　　　　

""")

elif mood == 3:

print("""

╔══╗　　　　　　　　　　　　

║══╣╔═╗╔╦╗╔╦╗╔╦╗

╠══║║║║║╔╝║╔╝║║║

╚══╝╚═╝╚╝　╚╝　╠═║

　　　　　　　　　　　　　╚═╝

""")

else:

print("Illegal mood value! (You must be in a really bad mood).")

print("...today.")

input("\n\nPress the enter key to exit.")

5、实战例子

#Three Year-Old Simulator

#演示while循环

print("\tWelcome to the 'three-Year-Old Simulator'\n")

print("This program simulates a conversation with a three-year-old child.")

print("Try to stop the madness.\n")

response = ""

while response != "Because.":

response = input("Why?\n")

print("Oh. Okay.")

input("\n\nPress the enter key to exit.")

6、实战例子

#Losing Battle

#演示可怕的无限循环

print("Your lone hero is surrounded by a massive army of trolls. ")

print("Their decaying green bodies stretch out,melting into the horizon.")

print("Your hero unsheathes his sword for the last fight of his life.\n")

health = 10

trolls = 0

damage = 3

while health != 0:

trolls += 1

health -= damage

print("Your hero swings and defeats an evil troll,"\

"but takes",damage,"damage points.\n")

print("Your hero fought valiantly and defeated",trolls,"trolls.")

print("But alas,your hero is no more.")

7、实战例子

#Losing Battle

#演示更改后循环

print("Your lone hero is surrounded by a massive army of trolls. ")

print("Their decaying green bodies stretch out,melting into the horizon.")

print("Your hero unsheathes his sword for the last fight of his life.\n")

health = 10

trolls = 0

damage = 3

while health > 0:

trolls += 1

health -= damage

print("Your hero swings and defeats an evil troll,"\

"but takes",damage,"damage points.\n")

print("Your hero fought valiantly and defeated",trolls,"trolls.")

print("But alas,your hero is no more.")