第九章

实例1 模拟幼儿园分苹果

def division():
    '''功能：分苹果'''
    print("\n==============分苹果了================\n")
    apple = int(input("请输入苹果的个数："))
    children = int(input("请输入来了几个小朋友："))
    result = apple // children
    remain = apple - result*children    #计算余下苹果
    if remain > 0:
        print(apple, "个苹果，平均分给", children, "个小朋友，每人分", result, "个。")
    else:
        print(apple, "个苹果，平均分给", children, "个小朋友，每人分", result, "个。")

if __name__ == '__main__':
    division()

运行结果

==============分苹果了================

请输入苹果的个数：10
请输入来了几个小朋友：10
10 个苹果，平均分给 10 个小朋友，每人分 1 个。

实例2 模拟幼儿园分苹果（除数不能为0）

def division():
    '''功能：分苹果'''
    print("\n==============分苹果了================\n")
    apple = int(input("请输入苹果的个数："))
    children = int(input("请输入来了几个小朋友："))
    result = apple // children
    remain = apple - result*children    #计算余下苹果
    if remain > 0:
        print(apple, "个苹果，平均分给", children, "个小朋友，每人分", result, "个。")
    else:
        print(apple, "个苹果，平均分给", children, "个小朋友，每人分", result, "个。")

if __name__ == '__main__':
    try:
        division()
    except ZeroDivisionError:
        print("\n出错了~_~ —— 苹果不能被0个小朋友分！")

运行结果

==============分苹果了================

请输入苹果的个数：10
请输入来了几个小朋友：0

出错了~_~ —— 苹果不能被0个小朋友分！

实例3 模拟幼儿园分苹果·（每个人至少分到一个苹果）

def division():
    '''功能：分苹果'''
    print("\n==============分苹果了================\n")
    apple = int(input("请输入苹果的个数："))
    children = int(input("请输入来了几个小朋友："))
    if apple < children:
        raise ValueError("苹果太少了，不够分...")    #抛出异常(reason)
    result = apple // children
    remain = apple - result*children    #计算余下苹果
    if remain > 0:
        print(apple, "个苹果，平均分给", children, "个小朋友，每人分", result, "个。")
    else:
        print(apple, "个苹果，平均分给", children, "个小朋友，每人分", result, "个。")

if __name__ == '__main__':
    try:
        division()
    except ZeroDivisionError:
        print("\n出错了~_~ —— 苹果不能被0个小朋友分！")
    except ValueError as e:
        print("\n出错了 ~_~ ——", e)

运行结果

请输入苹果的个数：5
请输入来了几个小朋友：10

出错了 ~_~ —— 苹果太少了，不够分...

实例4 模拟幼儿园分苹果（应用断言调试）

def division():
    '''功能：分苹果'''
    print("\n==============分苹果了================\n")
    apple = int(input("请输入苹果的个数："))
    children = int(input("请输入来了几个小朋友："))
    assert apple >= children, "苹果不够分"   #应用断言调试
    result = apple // children
    remain = apple - result*children    #计算余下苹果
    if remain > 0:
        print(apple, "个苹果，平均分给", children, "个小朋友，每人分", result, "个。")
    else:
        print(apple, "个苹果，平均分给", children, "个小朋友，每人分", result, "个。")

if __name__ == '__main__':
    division()

运行结果

==============分苹果了================

请输入苹果的个数：5
请输入来了几个小朋友：10
Traceback (most recent call last):
  File "E:/pycharmprojects/sy9.4.py", line 15, in <module>
    division()
  File "E:/pycharmprojects/sy9.4.py", line 6, in division
    assert apple >= children, "苹果不够分"   #应用断言调试
AssertionError: 苹果不够分