L +> +++

E-W + N +！o> + w ---

！O-！M-t +！5！ X R + tv-b ++ DI +！DG e-> +++ h！

Ian Tuomi写道

你好，我想知道，如果你写的话会有什么不同

void foo（int x）

/ * insert code这里* /
}


foo（int x）
{
/ *在这里插入代码* /
}

有什么区别？两种方式的功能都不会返回任何东西，对吧？写空虚有什么意义？它只是一个美化特征吗？

绝对不是。如果省略函数声明中的返回类型，则

返回类型默认为int，所以


foo（int x）


实际上是


int foo（int x）


void类型用作返回的类型通过不产生

值的函数。

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用户

>

Hello, I was wondering, does it make any difference if you write

void foo(int x)
{
/* insert code here */
}

or

foo(int x)
{
/* insert code here */
}

What is the difference?? Both ways the function wont return anything,
right? What is the point in writing void? Is it merely a cosmetic feature?

--
Ian Tuomi
Jyv?skyl?, Finland

GCS d- s+: a--- C++>$ L+>+++$ E- W+ N+ !o>+ w---
!O- !M- t+ !5 !X R+ tv- b++ DI+ !D G e->+++ h!

L+>+++

E- W+ N+ !o>+ w---
!O- !M- t+ !5 !X R+ tv- b++ DI+ !D G e->+++ h!

Ian Tuomi wrote

Hello, I was wondering, does it make any difference if you write

void foo(int x)
{
/* insert code here */
}

or

foo(int x)
{
/* insert code here */
}

What is the difference?? Both ways the function wont return anything,
right? What is the point in writing void? Is it merely a cosmetic feature?

Absolutely not. If you omit a return type from a function declaration, the
return type defaults to `int'', so

foo(int x)

is actually

int foo(int x)

The void type is used as the type returned by functions that generate no
value.
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user