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!

 

[Tom St Denis]

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)?10+b?1:0);

It becomes much clearer.

Tom

 

[Rich Grise]

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]

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.

 

[Artie Gold]

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

 

[Dave Thompson]

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.net