这有效吗？ [英] Does this works

问题描述

大家好，


我怀疑很久了。考虑一个结构

struct A {

int z;

}

struct n {

struct A * a;

int * y;

} * st;

这将有效

st -a -z = 10;

感谢adv

解决方案

raghu写道：

大家好，


我怀疑很久了。考虑一个结构

struct A {

int z;

}

缺少;

struct n {

struct A * a;

int * y;

} * st;

这将有效

尝试时发生了什么？

st -a -z = 10;

您认为st指向什么？在哪里初始化？


-

Ian Collins。

1月30日，10日：早上45点，Ian Collins< ian-n ... @ hotmail.comwrote：

raghu写道：

Hello Everyone，

我怀疑很长一段时间。考虑一个结构

struct A {

int z;

}

缺少;

struct n {

struct A * a;

int * y;

} * st;

这将有效

尝试时发生了什么？

st -a -z = 10;

您认为st指向什么？在哪里初始化？


-

Ian Collins。

oops抱歉结构A以''结尾; ''和本声明

st -a -z = 10;

在init函数中初始化，它填充了

结构的所有值。

raghu< ra ********* @ gmail.comwrote：

Hello Everyone，

我怀疑很长一段时间。考虑一个结构

struct A {

int z;

}

你忘记了;之后}

struct n {

struct A * a;

int * y;

} * st;

这将有效

st -a -z = 10;

是的，有两个条件：

- 你成功地为st />
分配内存 - 你成功地分配了内存对于st-> a

（如果您决定使用y，也适用于y）

-

Ioan - Ciprian Tandau
tandau _at_ freeshell _dot_ org（希望现在还不算太晚）

（......它还能运作......）

Hello Everyone,

I have a doubt for a long time. consider a structure
struct A{
int z;
}
struct n{
struct A *a;
int *y;
}*st;
will this works
st -a -z = 10;
Thanks in adv

解决方案

raghu wrote:

Hello Everyone,

I have a doubt for a long time. consider a structure
struct A{
int z;
}

Missing ;

struct n{
struct A *a;
int *y;
}*st;
will this works

What happened when you tried it?

st -a -z = 10;

What do you think st points to? Where is it initialised?

--
Ian Collins.

On Jan 30, 10:45 am, Ian Collins <[e-mail]:

raghu wrote:

Hello Everyone,

I have a doubt for a long time. consider a structure
struct A{
int z;
}

Missing ;

struct n{
struct A *a;
int *y;
}*st;
will this works

What happened when you tried it?

st -a -z = 10;

What do you think st points to? Where is it initialised?

--
Ian Collins.

oops sorry struct A ends with '' ; '' and this statement

st -a -z = 10;

initialized in init function which populates all the values of the
structure.

raghu <ra*********@gmail.comwrote:

Hello Everyone,

I have a doubt for a long time. consider a structure
struct A{
int z;
}

You forgot the ; after }

struct n{
struct A *a;
int *y;
}*st;

will this works
st -a -z = 10;

Yes, with two conditions:
- you succesfully allocate memory for st
- you succesfully allocate memory for st->a
(also for y if you decide to use y)
--
Ioan - Ciprian Tandau
tandau _at_ freeshell _dot_ org (hope it''s not too late)
(... and that it still works...)

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