About C and order of evaluation

[charpour]

Hello, in the program below:

#include <stdio.h>

int main(void) {
int x = 1, y = 2, z;

z = x+++y;
return 0;
}

after executing, z has the value of 3, x is 2 and y is 2.

Can someone please explain me in detail why it is treated by the
compiler as (x++)+y and not for example as x+(++y) ?
What steps the compiler does to produce that result ?

Thanks for your time and sorry for my bad english

Charalampos Pournaris

[SM Ryan]

ch******@yahoo. com wrote:

# z = x+++y;

It's not nice to fool Mother C.

'Doctor! Doctor! It hurts when I do this!'
'Then stop doing that.'

--
SM Ryan http://www.rawbw.com/~wyrmwif/
GERBILS
GERBILS
GERBILS

[Charlie Gordon]

"CBFalconer " <cb********@yah oo.coma écrit dans le message de news:
47************* **@yahoo.com...

David Mathog wrote:

>>

... snip ...

>>
Here's Hello World with all "extra" spaces and EOL's removed.
It's down to just 3 lines and two spaces: one between "int" and
"main" and one between "Hello" and "world". My news client
wrapped this after the second space but in the original it was
only a 3 line program.

#include <stdlib.h>
#include <stdio.h>
int main(void){(voi d)fprintf(stdou t,"Hello
world\n");(voi d)exit(EXIT_SUC CESS);}

This 3 line form is legal but it's also really hard to read. It
would be nice if gcc (for instance) had at least an optional
-Whuman, to issue warnings for difficult to read but otherwise
legal constructs.

How about:

#include <stdio.h>
int main(void){puts ("Hello World);return 0;}

and, if you really insist, you can (void)puts. Expanding to
minimum readability yields:

#include <stdio.h>
int main(void) {
puts("Hello World);
return 0;
}

Surely you meant this Mr Falconer:

#include <stdio.h>
int main(void) {
puts("Hello World");
return 0;
}

--
Chqrlie.

[Orlando B. Salazar]

Charlie Gordon wrote:

"CBFalconer " <cb********@yah oo.coma écrit dans le message de news:
47************* **@yahoo.com...

>David Mathog wrote:
... snip ...

>>Here's Hello World with all "extra" spaces and EOL's removed.
It's down to just 3 lines and two spaces: one between "int" and
"main" and one between "Hello" and "world". My news client
wrapped this after the second space but in the original it was
only a 3 line program.

#include <stdlib.h>
#include <stdio.h>
int main(void){(voi d)fprintf(stdou t,"Hello
world\n");(vo id)exit(EXIT_SU CCESS);}

This 3 line form is legal but it's also really hard to read. It
would be nice if gcc (for instance) had at least an optional
-Whuman, to issue warnings for difficult to read but otherwise
legal constructs.

How about:

#include <stdio.h>
int main(void){puts ("Hello World);return 0;}

and, if you really insist, you can (void)puts. Expanding to
minimum readability yields:

#include <stdio.h>
int main(void) {
puts("Hello World);
return 0;
}

Surely you meant this Mr Falconer:

#include <stdio.h>
int main(void) {
puts("Hello World");
return 0;
}

Are you determined to get from #8 to at least #2
in the "Top 20 posters by number of articles"
any way you can, or are you anal by nature?

Regards,
Orlando B. Salazar

[Charlie Gordon]

"Orlando B. Salazar" <ob*******@rege nzy.neta écrit dans le message de
news: x6************* *************** **@giganews.com...

Charlie Gordon wrote:

>"CBFalconer " <cb********@yah oo.coma écrit dans le message de news:
47************* **@yahoo.com...

>>David Mathog wrote:
... snip ...
Here's Hello World with all "extra" spaces and EOL's removed.
It's down to just 3 lines and two spaces: one between "int" and
"main" and one between "Hello" and "world". My news client
wrapped this after the second space but in the original it was
only a 3 line program.

#include <stdlib.h>
#include <stdio.h>
int main(void){(voi d)fprintf(stdou t,"Hello
world\n");(v oid)exit(EXIT_S UCCESS);}

This 3 line form is legal but it's also really hard to read. It
would be nice if gcc (for instance) had at least an optional
-Whuman, to issue warnings for difficult to read but otherwise
legal constructs.
How about:

#include <stdio.h>
int main(void){puts ("Hello World);return 0;}

and, if you really insist, you can (void)puts. Expanding to
minimum readability yields:

#include <stdio.h>
int main(void) {
puts("Hello World);
return 0;
}

Surely you meant this Mr Falconer:

#include <stdio.h>
int main(void) {
puts("Hello World");
return 0;
}

Are you determined to get from #8 to at least #2
in the "Top 20 posters by number of articles"
any way you can, or are you anal by nature?

I guess anality rubs in on c.l.c, especially from reading posts by CBF and
RJH ;-)

--
Chqrlie.