What's the output?

[Christopher Benson-Manica]

Can you correctly identify the output of the following program,
without compiling it?

#include <stdio.h>

int main( void )
{
int a=1;
int b=0;
int foo=10+a?1:0+b? 1:0;
printf( "%d\n", foo );
return 0;
}

Let's just say that I wish I had opened my desktop C references BEFORE
compiling and checking in certain changes I made. D'oh!

--
Christopher Benson-Manica | I *should* know what I'm talking about - if I
ataru(at)cybers pace.org | don't, I need to know. Flames welcome.

[Tom St Denis]

Christopher Benson-Manica wrote:

Can you correctly identify the output of the following program,
without compiling it?

#include <stdio.h>

int main( void )
{
int a=1;
int b=0;
int foo=10+a?1:0+b? 1:0;
printf( "%d\n", foo );
return 0;
}

Let's just say that I wish I had opened my desktop C references BEFORE
compiling and checking in certain changes I made. D'oh!

My initial guess was 1 [and I checked] and I questioned myself thinking 11.

This is why god invented () btw. Write it as

int foo = (10+a)?1:(0+b?1 :0);

It becomes much clearer.

Tom

[Rich Grise]

Christopher Benson-Manica wrote:

Can you correctly identify the output of the following program,
without compiling it?
Yes. :-)
#include <stdio.h>

int main( void )
{
int a=1;
int b=0;
int foo=10+a?1:0+b? 1:0;
printf( "%d\n", foo );
return 0;
}

Let's just say that I wish I had opened my desktop C references BEFORE
compiling and checking in certain changes I made. D'oh!

Wrong, huh? ;-)

Cheers!
Rich

[Jack Klein]

On Fri, 13 Aug 2004 15:55:15 +0000 (UTC), Christopher Benson-Manica
<at***@nospam.c yberspace.org> wrote in comp.lang.c:

Can you correctly identify the output of the following program,
without compiling it?

#include <stdio.h>

int main( void )
{
int a=1;
int b=0;
int foo=10+a?1:0+b? 1:0;
printf( "%d\n", foo );
return 0;
}

Let's just say that I wish I had opened my desktop C references BEFORE
compiling and checking in certain changes I made. D'oh!

Don't have to. The programmer who wrote that on my team would be
warned the first time. Transferred or fired if it happened a second
time.

--
Jack Klein
Home: http://JK-Technology.Com
FAQs for
comp.lang.c http://www.eskimo.com/~scs/C-faq/top.html
comp.lang.c++ http://www.parashift.com/c++-faq-lite/
alt.comp.lang.l earn.c-c++
http://www.contrib.andrew.cmu.edu/~a...FAQ-acllc.html

[Artie Gold]

Jack Klein wrote:

On Fri, 13 Aug 2004 15:55:15 +0000 (UTC), Christopher Benson-Manica
<at***@nospam.c yberspace.org> wrote in comp.lang.c:

Can you correctly identify the output of the following program,
without compiling it?

#include <stdio.h>

int main( void )
{
int a=1;
int b=0;
int foo=10+a?1:0+b? 1:0;
printf( "%d\n", foo );
return 0;
}

Let's just say that I wish I had opened my desktop C references BEFORE
compiling and checking in certain changes I made. D'oh!

Don't have to. The programmer who wrote that on my team would be
warned the first time. Transferred or fired if it happened a second
time.

<facetious>
Wouldn't you expect your programmers to understand operator precedence?
</facetious>

<reality>
You are too kind.
</reality>

--ag

--
Artie Gold -- Austin, Texas

20050120->44

[Dave Thompson]

On Fri, 13 Aug 2004 15:55:15 +0000 (UTC), Christopher Benson-Manica
<at***@nospam.c yberspace.org> wrote:

Can you correctly identify the [result of]
int foo=10+a?1:0+b? 1:0;

Which is why to achieve what you wanted you should have done
int foo = 10+!!a+!!b;
which is read in "English"(? ) as ten plus "absolutely the truth value
of a" plus similarly for b <G> <G> <G up SHRT_MAX>.

- David.Thompson1 at worldnet.att.ne t