“Hello World”没有分号的差异 [英] "Hello World" without semicolon with a difference

问题描述

是否可以编写打印Hello World的C程序。在屏幕上没有

在整个程序中只有一个分号？

这里的额外限制是你不允许使用if，while，switch等。 />

到目前为止，我认为这可以通过插入主要

中的printf语句来完成，如下所示：


int main（int argc = printf（" Hello world））

{

}

注意：ANSI C中不允许这样做，默认参数更像是一个C ++概念。


即使这不起作用。它编译和运行但不打印任何东西。


解决方案是这个问题可能在c（或c ++中）？

Hi,

Is it possible to write a C program that prints "Hello World" on screen without
having a single semi-colon in the entire program?
The extra constraint here is that u r not allowed to use if,while,switch etc.

So far,i figured this could be done by insertint the printf statement in main
as shown:

int main(int argc=printf("Hello world")
{
}
Note:This is not allowed in ANSI C,default arguments are more a C++ concept.

Even this doesnt work.It compiles & runs but doesnt print anything.

Is the solution to this question possible in c(or c++ for that matter)?

推荐答案

我相信除非你认为这是一个有效选项：

#include< stdio.h>


#define WEE put（Hello World！）;


int main（int argc，char * argv []）{

WEE

}

... in事实上要在屏幕上打印你需要一个指令..并且每个指令后面都需要一个分号。


祝你好运。


ankursinha写道：

I believe not unless you consider this a valid option:
#include <stdio.h>

#define WEE puts( "Hello World!" );

int main( int argc, char * argv[] ) {
WEE
}
...in fact to print on the screen you need an instruction.. and
in C every instruction has to be followed by a semi-colon.

Best regards.

ankursinha wrote:

是否可以编写一个打印Hello World的C程序。屏幕上没有
在整个程序中有一个分号？
这里的额外限制是你不允许使用if，while，switch等

到目前为止，我认为这可以通过插入主要的


int main（int argc = printf（" Hello world））
{
即使这不起作用。它编译和运行但不打印任何东西。这个问题的解决方案是否可以用c（或c ++）？

Hi,

Is it possible to write a C program that prints "Hello World" on screen without
having a single semi-colon in the entire program?
The extra constraint here is that u r not allowed to use if,while,switch etc.

So far,i figured this could be done by insertint the printf statement in main
as shown:

int main(int argc=printf("Hello world")
{
}
Note:This is not allowed in ANSI C,default arguments are more a C++ concept.

Even this doesnt work.It compiles & runs but doesnt print anything.

Is the solution to this question possible in c(or c++ for that matter)?

-

Roberto Nunnari -software engineer -

mailto：ro ** @nunnisoft.ch
http： //www.nunnisoft.ch

Residenza Boschetto 12电话/传真：+ 41-91-6046511

6935 Bosco Luganese"mobile ：+ 41-76-3208561

瑞士（oo）
======================== oOO ==（_）== OOo ============ = ===========

--
Roberto Nunnari -software engineer-
mailto:ro**@nunnisoft.ch
http://www.nunnisoft.ch
Residenza Boschetto 12 tel/fax: [phone]
6935 Bosco Luganese """ mobile: [phone]
Switzerland (o o)
========================oOO==(_)==OOo============= ===========

ankursinha写道：

ankursinha wrote:

是否可以编写一个打印Hello World的C程序。屏幕上没有
整个程序中有一个分号？


回答＃1：不，因为C语言没有概念

a" screen。


答案＃2：是，如下


?? = include< stdio.h>

int main（void）{

put（Hello，world！）;;

返回10 ??''012 ;;

??>


观察没有单个分号。

这里的额外约束是你不允许使用if，while，switch等等。


在这种情况下，问题是不可能的。 （假设：等等

包括左括号字符''（''。）

到目前为止，我认为这可以通过insertint printf语句来完成主要如图所示：

int main（int argc = printf（" Hello world））


注意：这是不允许的在ANSI C中，默认参数更像是一个C ++概念。

即使这不起作用。它编译和运行但不打印任何东西。

这个问题的解决方案是否可行在c（或c ++中）？

Hi,

Is it possible to write a C program that prints "Hello World" on screen without
having a single semi-colon in the entire program?
Answer #1: No, because the C language has no concept of
a "screen."

Answer #2: Yes, as follows

??=include <stdio.h>
int main(void) {
puts ("Hello, world!");;
return 10??''012;;
??>

Observe that there are no single semi-colons.
The extra constraint here is that u r not allowed to use if,while,switch etc.
In that case, the problem is impossible. (Assumption: "etc"
includes the open parenthesis character ''(''.)
So far,i figured this could be done by insertint the printf statement in main
as shown:

int main(int argc=printf("Hello world")
{
}
Note:This is not allowed in ANSI C,default arguments are more a C++ concept.

Even this doesnt work.It compiles & runs but doesnt print anything.

Is the solution to this question possible in c(or c++ for that matter)?

DYOH。或者如果你不是DYOH，至少是RTFW。


-
Er*********@sun.com

ankursinha写道：

ankursinha wrote:

是否可以编写一个C程序，在屏幕上打印Hello World而不用
在整个程序中单个分号？
这里的额外约束是你不允许使用if，whil e，切换等。

Is it possible to write a C program that prints "Hello World" on screen without
having a single semi-colon in the entire program?
The extra constraint here is that u r not allowed to use if,while,switch etc.

这会调用未定义的行为，因为可变长度数组类型

与普通数组类型不兼容，但是这是我最接近的
。显然是C99。


#include< stdio.h>

int main（int argc，char * argv [static printf（" ; Hello World \ nn），0]）

{

}


还有


#error" Hello World"


但我不认为这是一个程序。


杰里米。

This invokes undefined behaviour, because variable length array types
aren''t compatible with normal array types, but it''s the closest I
could get. It''s C99, obviously.

#include <stdio.h>
int main(int argc, char *argv[static printf("Hello World\n"), 0])
{
}

There''s also

#error "Hello World"

but I don''t consider that a program.

Jeremy.

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