Re: What is the meaning of an expression?

On 1/15/2022 2:21 PM, matt.ti...@gmail.com wrote:


> Of course, expressions in most languages can also include function calls and
> operators that produce side effects, like "printf("%d",++i);", which certainly
> has a meaning even though it produces no meaningful value.


Actually, it does. It returns the number of characters written, or -1
on error. Therefore, you can write a /meaningful/ hello world like
this,


      int main( int argc, char *argv[] ) { return printf( "hello\n" ); }


Of course, people generally don't like to put the return before the
printf(), and there's no telling what the operating system will do;
think OpenVMS.


--
Johann | email: invalid -> com | www.myrkraverk.com/blog/
I'm not from the Internet, I just work there. | twitter: @myrkraverk

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