今天分享的是第七章的要点和部分课后习题的参考代码。
要点：
1、input（）的工作原理和使用.
2、用int（）来获取数值输入.
3、求模运算符%.
4、while循环的使用.
5、break的使用.
6、continue的使用.
7、用while来处理列表和字典.
参考代码：
7-1 略
7-2 略
7-3
>>> number = input("Please input a number:")
Please input a number:23
>>> number = int(number)
>>> if number % 10:
... print(str(number) + "不是10的倍数.")
... else:
... print(str(number) + "是10的倍数.")
...
23不是10的倍数.
7-4
>>> ingredient = ""
>>> while ingredient != "quit":
... ingredient = input("Please input an ingredient:")
... if ingredient != "quit":
... print("We will add " + ingredient + " to the pizza")
...
Please input an ingredient:tomato
We will add tomato to the pizza
Please input an ingredient:potato
We will add potato to the pizza
Please input an ingredient:quit
7-5(略，与7-4类似）
7-6
>>> ingredient = ""
>>> active = 1
>>> while active:
... ingredient = input("Please input an ingredient:")
... if ingredient != "quit":
... print("We will add " + ingredient + " to the pizza")
... else:
... break;
...
...
Please input an ingredient:tomato
We will add tomato to the pizza
Please input an ingredient:potato
We will add potato to the pizza
Please input an ingredient:quit
>>>
7-7略
7-8
sandwich_orders = ["beef", "fish", "pork"] finished_sandwiches = [] while sandwich_orders: sand_ = sandwich_orders.pop() finished_sandwiches.append(sand_) print(finished_sandwiches)
运行结果：
['pork', 'fish', 'beef'] [Finished in 0.0s]
7-9略
7-10略