基本记忆清除问题 [英] fundamental memory clearing question

问题描述

嗨。


我有一个在循环的前一次迭代中使用的结构，我

想要清除前一次迭代所分配的所有结构值，而不是将每个变量赋值为0.


我想到了几个方法要做到这一点，但它们都是环形的...

有谁知道更好的方法吗？


这是一个样子，我来的样子可以使用。

void clear_the_structure（）//没有参数，因为结构是extern

{

for（i = 0; i< sizeof （mystructure）; i ++）//对于每个字节中的
结构'的内存

{

（（unsigned char）mystructure）[ i] = 0; //将此字节设为空

}

}

解决方案

Jason写道：

你好。

我有一个在循环的前一次迭代中使用的结构，我想要清除上一次迭代分配的所有结构值，而不是将每个变量赋值为0.

我想过几种方法可以做到这一点，但它们都是迂回的......
有没有人知道更好的方法呢？

这是我想出的一个样例。

void clear_the_structure（）//没有参数因为结构是extern
{
对于（i = 0; i< sizeof（mystructure）; i ++）//对于
结构的内存中的每个字节
{
（（unsigned char）mystructure）[i] = 0; //将此字节设置为空
}
}

请不要告诉我们更多关于''mystructure''的信息。 。

它是POD吗？

Stefan

-

< blockquote> * Jason：

我有一个在循环的前一次迭代中使用的结构，我想清除所有结构值在没有将每个变量赋值为0的情况下分配上一次迭代。

使循环的结构本地化，并对其进行零初始化。


while（stillLooping）

{

结构s =结构（）;

...

}


如果Structure是POD，可以更短。


-

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：usen上最烦人的事情是什么et和电子邮件？

" Jason" < JA *** @ acd.net>在消息中写道

新闻：ae ****************************** @ giganews.com .. 。

你好。

我有一个在循环的前一次迭代中使用的结构，我想要清除所有的结构上一次迭代分配的值，而不是将每个变量赋值为0.

我想过几种方法可以做到这一点，但它们都是迂回的...
这是我想出的一个样例。

void clear_the_structure（）//没有参数，因为结构是extern
{
对于（i = 0; i< sizeof（mystructure）; i ++）//对于
结构的内存中的每个字节
{
（（unsigned char）mystructure）[i] = 0; //将此字节设置为空
}
}

memset（& mystructure，42，sizeof（mystructure）） ;


您确实说过您不想将每个变量设置为零......

Hi.

I have a structure that was used in a previous iteration of a loop, and I
want to clear out all the structures values that the previous iteration
assigned without assigning every variable to be 0.

I''ve thought of a few ways to do this, but they are all roundabout...
Does anyone know of a better way to do this?

Heres a sample idea that I came up with.
void clear_the_structure() // no parameters because structure is extern
{
for (i=0; i < sizeof(mystructure); i++) // for each byte in
structure''s memory
{
((unsigned char)mystructure)[i] = 0; // set this byte to null
}
}

解决方案

Jason wrote:

Hi.

I have a structure that was used in a previous iteration of a loop, and I
want to clear out all the structures values that the previous iteration
assigned without assigning every variable to be 0.

I''ve thought of a few ways to do this, but they are all roundabout...
Does anyone know of a better way to do this?

Heres a sample idea that I came up with.
void clear_the_structure() // no parameters because structure is extern
{
for (i=0; i < sizeof(mystructure); i++) // for each byte in
structure''s memory
{
((unsigned char)mystructure)[i] = 0; // set this byte to null
}
}

Please, don''t tell us more about ''mystructure''...
Is it a POD ?
Stefan
--

* Jason:

I have a structure that was used in a previous iteration of a loop, and I
want to clear out all the structures values that the previous iteration
assigned without assigning every variable to be 0.

Make the structure local to the loop, and zero-initialize it.

while( stillLooping )
{
Structure s = Structure();
...
}

which can be shorter if Structure is a POD.

--
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?

"Jason" <ja***@acd.net> wrote in message
news:ae******************************@giganews.com ...

Hi.

I have a structure that was used in a previous iteration of a loop, and I
want to clear out all the structures values that the previous iteration
assigned without assigning every variable to be 0.

I''ve thought of a few ways to do this, but they are all roundabout...
Does anyone know of a better way to do this?

Heres a sample idea that I came up with.
void clear_the_structure() // no parameters because structure is extern
{
for (i=0; i < sizeof(mystructure); i++) // for each byte in
structure''s memory
{
((unsigned char)mystructure)[i] = 0; // set this byte to null
}
}

memset(&mystructure, 42, sizeof(mystructure));

You did say you don''t want to set every variable to zero...

这篇关于基本记忆清除问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！