'int * i'或'int * i' [英] 'int *i ' or 'int* i'
问题描述
那里，
在C编程中，对于指针，我看到了两种编程风格：
一个用变量连接''*'' ，比如''int * i'';
另一个是用数据类型连接''*''，''int * i''
我想知道哪种风格更标准。是否有规则要遵循？
提前致谢，
Julia
Hi, there,
In C programming, for pointer, I saw two programming styles:
one is connecting ''*'' with variable, like, ''int *i'';
the other is connecting ''*'' with data type, like, ''int* i''
I wonder which style is more standard. Is there a rule to follow?
Thanks in advance,
Julia
推荐答案
Julia写道：
Julia wrote:
>
那里，
在C编程中，对于指针，我看到了两种编程风格：
一个是用变量连接''*''，比如''int * i'';
另一个用数据类型连接''*''，''int * i''
我想知道哪种风格更标准。
>
Hi, there,
In C programming, for pointer, I saw two programming styles:
one is connecting ''*'' with variable, like, ''int *i'';
the other is connecting ''*'' with data type, like, ''int* i''
I wonder which style is more standard.
我认为
int * i;
比
$ b $更常见b int * i;
int * i;
伴随着
int * i，* j，* k;
I think that
int *i;
is more common than
int* i;
int *i;
goes along with
int *i, *j, *k;
是否有规则要遵循？
Is there a rule to follow?
-
pete
--
pete
2006-07-21，Julia < ju ******** @ yahoo.comwrote：
On 2006-07-21, Julia <ju********@yahoo.comwrote:
那里，
在C中编程，对于指针，我看到了两种编程风格：
一个用变量连接''*''，比如''int * i'';
另一个将''*''与数据类型连接起来，比如''int * i''
Hi, there,
In C programming, for pointer, I saw two programming styles:
one is connecting ''*'' with variable, like, ''int *i'';
the other is connecting ''*'' with data type, like, ''int* i''
int *我的风格更好，恕我直言。
你怎么认为
int * i，j，k，l;
是什么意思？您认为设计师的意图是什么意思？
int * a，* b，c，* d;
的含义非常明显，尽管有些将争论声明组合成一行将讨论
的优点。
int *i is better style, IMHO.
What do you think that
int* i, j, k, l;
means? What do you think that the designer intended it to mean?
int *a, *b, c, *d;
is very obvious in what it means, although some will debate the
merits of comining declarations onto one line.
我想知道哪种风格更标准。是否有规则要遵循？
I wonder which style is more standard. Is there a rule to follow?
风格没有标准化，任何试图这样做的人都会被哄骗。它押韵！ ;-)
-
Andrew Poelstra<网站关闭>
我的服务器已关闭;你不能给我发邮件，也不能随便发帖。
Style isn''t standardized, and anyone attempting to do so would be
ostricized. It rhymes! ;-)
--
Andrew Poelstra <website down>
My server is down; you can''t mail
me, nor can I post convieniently.
" Julia" < ju ******** @ yahoo.comwrites：
"Julia" <ju********@yahoo.comwrites:
在C编程中，对于指针，我看到了两种编程风格：
一个用变量连接''*''，比如''int * i'';
另一个用数据类型连接''*''，''int *我'
我想知道哪种风格更标准。有规则要遵循吗？
In C programming, for pointer, I saw two programming styles:
one is connecting ''*'' with variable, like, ''int *i'';
the other is connecting ''*'' with data type, like, ''int* i''
I wonder which style is more standard. Is there a rule to follow?
两者在语义上都是相同的;编译器不关心你使用哪一个b $ b。但是int * i;形式更紧密地跟随
声明的实际含义。
C使用声明跟随使用原则，这可能会让你感到困惑
，直到你习惯它为止。例如，
int * i;
表示* i是一个int，而不是i是指向int的指针 ;。 （实际上它意味着
两者，因为它们在逻辑上是等价的，但是* i是一个int
解释是与语法相对应的解释。 ）
当你在一行上声明多个东西
时，这一点变得尤为重要。例如：
int x，* y，** z;
表示x，* y和** z都是类型为int（使x为int，y
a指向int的指针，za指向指向int的指针）。
使用
int * x;
很容易写：
int * x，y;
，它不会使x和y指向int;它使xa指向
int和y为int，因为你可以看到你是否更正了间距：
int * x，y;
由于令牌之间的空格被忽略，如果您的布局具有误导性，编译器不会警告您/ b
;它只是假设你的意思是你写的是什么。
-
Keith Thompson（The_Other_Keith） ks *** @ mib.org < http://www.ghoti.net/~kst>
圣地亚哥超级计算机中心< *< http://users.sdsc.edu/~kst>
我们必须做点什么。这是事情。因此，我们必须这样做。
Both are semantically identical by themselves; the compiler doesn''t
care which one you use. But the "int *i;" form more closely follows
the actual meaning of the declaration.
C uses a "declaration follows use" principle, which can be confusing
until you get used to it. For example,
int *i;
means "*i is an int", not "i is a pointer to int". (Actually it means
both, since they''re logically equivalent, but the "*i is an int"
interpretation is the one that corresponds to the syntax.)
This becomes particularly important when you declare multiple things
on one line. For example:
int x, *y, **z;
means that x, *y, and **z are all of type int (which makes x an int, y
a pointer to int, and z a pointer to pointer to int).
Using
int* x;
makes it tempting to write:
int* x, y;
which doesn''t make x and y pointers to int; it makes x a pointer to
int and y an int, as you can see if you correct the spacing:
int *x, y;
And since spaces between tokens are ignored, the compiler won''t warn
you if your layout is misleading; it will simply assume that you meant
what you wrote.
--
Keith Thompson (The_Other_Keith) ks***@mib.org <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <* <http://users.sdsc.edu/~kst>
We must do something. This is something. Therefore, we must do this.
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