实现sizeof运算符 [英] Implementing the sizeof operator
问题描述
有人最近要我实现sizeof运算符，即
写一个接受任何类型参数的函数，没有
使用sizeof运算符，应该能够以字节为单位返回内存中该数据类型所占用的大小
。谢谢:)
Abhishek Srivastava
Hi,
Somebody recently asked me to implement the sizeof operator, i.e. to
write a function that accepts a parameter of any type, and without
using the sizeof operator, should be able to return the size occupied
by that datatype in memory in bytes. Thanks :)
Abhishek Srivastava
推荐答案
* Abhishek Srivastava：
* Abhishek Srivastava:
>
有人最近要我实现sizeof运算符，即
写一个接受参数的函数任何类型，并且没有
使用sizeof运算符，应该能够以字节为单位返回内存中该数据类型所占用的大小
。谢谢:)
>
Somebody recently asked me to implement the sizeof operator, i.e. to
write a function that accepts a parameter of any type, and without
using the sizeof operator, should be able to return the size occupied
by that datatype in memory in bytes. Thanks :)
这听起来像家庭作业。
一个人必须希望没有人为你提供源代码（尽管他们
总是如此，以展示他们编写琐碎事物的能力。）
提示：数组。
- -
答：因为它弄乱了人们通常阅读文字的顺序。
问：为什么这么糟糕？
A：热门发布。
问：usenet和电子邮件中最烦人的事情是什么？
This sounds like HOMEWORK.
One must hope that nobody provides source code for you (although they
invariably do, to show off their ability to code trivial things).
Hint: array.
--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
Abhishek Srivastava写道：
Abhishek Srivastava wrote:
有人最近要我实现sizeof运算符，即
写一个接受任何类型参数的函数，并且没有
使用sizeof运算符，应该能够以字节为单位返回内存中该数据类型占用的大小。谢谢:)
Hi,
Somebody recently asked me to implement the sizeof operator, i.e. to
write a function that accepts a parameter of any type, and without
using the sizeof operator, should be able to return the size occupied
by that datatype in memory in bytes. Thanks :)
请注意，
数组的两个相邻元素之间的地址差异等于元素的大小。
Tom
Note that the difference in address between two adjacent elements of an
array is equal to the size of an element.
Tom
您好Alf P. Steinbach :)
这不是作业。只是想知道，因为我无法想到
解决方案。嗯....你的提示是使用数组，仍在思考
。非常感谢。
Alf P. Steinbach写道：
Hi Alf P. Steinbach :)
This is not homework. Just wanted to know because I couldn''t think of
the solution. Hmmmm.... your hint is to use an array, still pondering
over that. Thanks anyway.
Alf P. Steinbach wrote:
* Abhishek Srivastava：
* Abhishek Srivastava:
有人最近要我实现sizeof运算符，即
编写一个接受任何类型参数的函数，并且没有
使用sizeof运算符，应该能够以字节为单位返回内存中该数据类型所占用的大小
。谢谢:)
Somebody recently asked me to implement the sizeof operator, i.e. to
write a function that accepts a parameter of any type, and without
using the sizeof operator, should be able to return the size occupied
by that datatype in memory in bytes. Thanks :)
这听起来像家庭作业。
一个人必须希望没有人为你提供源代码（尽管他们
总是如此，以展示他们编写琐碎事物的能力。）
提示：数组。
- -
答：因为它弄乱了人们通常阅读文字的顺序。
问：为什么这么糟糕？
答：热门发布。
问：usenet和电子邮件中最烦人的事情是什么？
This sounds like HOMEWORK.
One must hope that nobody provides source code for you (although they
invariably do, to show off their ability to code trivial things).
Hint: array.
--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
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