MCSD - Re: One code, 2 different results C# vs C++

06-29-2003, 01:53 PM

It is clearly not the case that assignment operators have higher precedence
than prefix decrement in any of the languages in question.

"Caio Proiete" <> wrote in message
news:050d01c33cb2$669609a0$...
> Well... maybe you're right...
>
> So the expression:
> x += --x
>
> Would be
> x = --(x + x)
>
> nice... but weird

>
> Thanks
>
> Caio Proiete
> MCSD (Visual C++)
>
>
> >-----Original Message-----
> >In article <084701c33c51$4451b990$>,
> > says...
> >> Hi, I was just studying for my 70-315 test and had one
> >> surprise. Look at this code:
> >>
> >> int myFunc()
> >> {
> >> int x;
> >> x = 42;
> >> x++;
> >> x += --x;
> >> return x;
> >> }
> >>
> >> What is the value returned from myFunc()?
> >> As a C++ programmer I said: "84 of course".
> >>
> >> But when I compiled with C#, the function returns "85".
> >> Just to confirm, I also compiled the same code with
> Java
> >> and returned 85 either.
> >>
> >> Well... can anyone explain this?

> >>
> >> Regards,
> >>
> >> Caio Proiete
> >> MCSD (Visual C++)
> >>
> >
> >+= takes priority over prefix decrement.
> >--
> >Thanks
> > DEK
> >.
> >

clyclopedic

06-29-2003, 02:41 PM

Absolutely Correct....

>-----Original Message-----
>It is clearly not the case that assignment operators have
higher precedence
>than prefix decrement in any of the languages in question.
>
>"Caio Proiete" <> wrote in message
>news:050d01c33cb2$669609a0$...
>> Well... maybe you're right...
>>
>> So the expression:
>> x += --x
>>
>> Would be
>> x = --(x + x)
>>
>> nice... but weird

>>
>> Thanks
>>
>> Caio Proiete
>> MCSD (Visual C++)
>>
>>
>> >-----Original Message-----
>> >In article <084701c33c51$4451b990$>,
>> > says...
>> >> Hi, I was just studying for my 70-315 test and had
one
>> >> surprise. Look at this code:
>> >>
>> >> int myFunc()
>> >> {
>> >> int x;
>> >> x = 42;
>> >> x++;
>> >> x += --x;
>> >> return x;
>> >> }
>> >>
>> >> What is the value returned from myFunc()?
>> >> As a C++ programmer I said: "84 of course".
>> >>
>> >> But when I compiled with C#, the function
returns "85".
>> >> Just to confirm, I also compiled the same code with
>> Java
>> >> and returned 85 either.
>> >>
>> >> Well... can anyone explain this?

>> >>
>> >> Regards,
>> >>
>> >> Caio Proiete
>> >> MCSD (Visual C++)
>> >>
>> >
>> >+= takes priority over prefix decrement.
>> >--
>> >Thanks
>> > DEK
>> >.
>> >
>
>
>.
>

06-29-2003, 02:41 PM	#2
Shailendra Sharma Posts: n/a	Re: One code, 2 different results C# vs C++ Absolutely Correct.... >-----Original Message----- >It is clearly not the case that assignment operators have higher precedence >than prefix decrement in any of the languages in question. > >"Caio Proiete" <> wrote in message >news:050d01c33cb2$669609a0$... >> Well... maybe you're right... >> >> So the expression: >> x += --x >> >> Would be >> x = --(x + x) >> >> nice... but weird >> >> Thanks >> >> Caio Proiete >> MCSD (Visual C++) >> >> >> >-----Original Message----- >> >In article <084701c33c51$4451b990$>, >> > says... >> >> Hi, I was just studying for my 70-315 test and had one >> >> surprise. Look at this code: >> >> >> >> int myFunc() >> >> { >> >> int x; >> >> x = 42; >> >> x++; >> >> x += --x; >> >> return x; >> >> } >> >> >> >> What is the value returned from myFunc()? >> >> As a C++ programmer I said: "84 of course". >> >> >> >> But when I compiled with C#, the function returns "85". >> >> Just to confirm, I also compiled the same code with >> Java >> >> and returned 85 either. >> >> >> >> Well... can anyone explain this? >> >> >> >> Regards, >> >> >> >> Caio Proiete >> >> MCSD (Visual C++) >> >> >> > >> >+= takes priority over prefix decrement. >> >-- >> >Thanks >> > DEK >> >. >> > > > >. >

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06-29-2003, 01:53 PM	#1
	Re: One code, 2 different results C# vs C++ It is clearly not the case that assignment operators have higher precedence than prefix decrement in any of the languages in question. "Caio Proiete" <> wrote in message news:050d01c33cb2$669609a0$... > Well... maybe you're right... > > So the expression: > x += --x > > Would be > x = --(x + x) > > nice... but weird > > Thanks > > Caio Proiete > MCSD (Visual C++) > > > >-----Original Message----- > >In article <084701c33c51$4451b990$>, > > says... > >> Hi, I was just studying for my 70-315 test and had one > >> surprise. Look at this code: > >> > >> int myFunc() > >> { > >> int x; > >> x = 42; > >> x++; > >> x += --x; > >> return x; > >> } > >> > >> What is the value returned from myFunc()? > >> As a C++ programmer I said: "84 of course". > >> > >> But when I compiled with C#, the function returns "85". > >> Just to confirm, I also compiled the same code with > Java > >> and returned 85 either. > >> > >> Well... can anyone explain this? > >> > >> Regards, > >> > >> Caio Proiete > >> MCSD (Visual C++) > >> > > > >+= takes priority over prefix decrement. > >-- > >Thanks > > DEK > >. > > clyclopedic