7-1汽车租赁：
str=input('What car do you want ')
print('Let me see if I can find you a',str1)运行结果：
7-2餐厅订位：
str1=input('How many people will come to the dinner:')
str1=int(str1)
if str1>8:
print('No empty table')
else:
print('There are empty table')
运行结果：
7-3 10的整数倍：
num=int(input('Please input a number:'))
print('The number is times of 10') if num%10==0 else print('The number is not times of 10')
运行结果：
7-4 比萨配料：
mes=input('Please input favor,"quit" to quit\n')
while mes!='quit':
print('We will add',mes,'to the pizza')
mes=input('Please input favor,"quit" to quit\n')
运行结果：
7-5 电影票：
num=input('Please input your age,"quit" to quit\n')
while num!='quit':
num=int(num)
if num<3:
print('Free')
elif num>=3 and num<12:
print('10 dollars')
else:
print('15 dollars')
num=input('Please input your age,"quit" to quit\n')运行结果：
7-6三个出口：
active=True
while active:
num=input('Please input your age,"quit" to quit\n')
if num=='quit':
break
num=int(num)
if num<3:
print('Free')
elif num>=3 and num<12:
print('10 dollars')
else:
print('15 dollars')
运行结果：
同上一题
7-7无限循环：
active=True
while active:
print('hhh')
运行结果：
按了ctrl+c并没有反映。。。。。不知道为什么
7-8熟食店：
sandwich_orders=['apple sandwich','banana sandwich','orange sandwich']
finished_sandwich=[]
while sandwich_orders:
tmp=sandwich_orders.pop(0)
print('I made your '+tmp)
finished_sandwich.append(tmp)
for sand in finished_sandwich:
print(sand)
运行结果：
7-9五香肉：
print('Pastrami has been sold')
sandwich_orders=['pastrami','apple sandwich','pastrami','banana sandwich','pastrami','orange sandwich']
while 'pastrami' in sandwich_orders:
sandwich_orders.remove('pastrami')
print(sandwich_orders)
运行结果：
7-10 梦想的度假胜地：
places=[]
while True:
tmp=input('If you could visit one place in the world, where would you go\n')
if tmp=='quit':
break
places.append(tmp)
print(places)运行结果：
