#猜年龄大小，用户最多猜三次
age = 50 i = 0 while i < 3: guess_age = int(input("please input your answer:")) if guess_age > age: print(too big...try again please) elif guess_age < age: print("too small...try again please") else: print("you guessed it!") break i += 1 if i == 3:
#猜年龄，每隔三次询问是否继续玩
age = 50 for i in range(1,100): guess_age = int(input("please input your answer:")) if guess_age > age: print(too big...try again please) elif guess_age < age: print(too small...try again please) else: print(you guessed it !) if i%3 == 0: choice = input(would you like play again? yes or no) if choice == yes: continue if choice == no: break else: continue
#登录验证，输入错误三次锁定用户
f = open('c:/user_passwd.txt','r') j = 3 system_user_name = str(f.readline()) system_passwd = str(f.readline()) f.close() for i in range(1,5): user_name = str(input(please input your userid:)) password = str(input(passwd:)) if i == 3: s = open('c:/user_passwd.txt', 'r+') s.write(\nlocked) s.close() print(this user is locked!) break else: if user_name + '\n' == system_user_name and password == system_passwd: print(welcome + user_name + '\n' + have a good time!) break else: j -= 1 i += 1
print(userid or password is wrong,please try once again and you have + \ str(j) + 'times choice')
以上就是python学习之函数及流程控制的详细内容。