C# equivalent syntax

[C# newcomer]

Hi all
Please help me with the C# equivalent syntax for the
following C++ code. Thanks a lot in advance.

double *firstVal;
int secondVal;
double thirdVal;
int fourthVal;

firstVal = new double[secondVal];
*(firstVal + thirdVal) = fourthVal;

delete [] firstVal;

[Tu-Thach]

RE: C# equivalent syntax

Are we glad C# does not have those pointers! Anyways, that code does not make much sense

Tu-Thac

----- C# newcomer wrote: ----

Hi al
Please help me with the C# equivalent syntax for the
following C++ code. Thanks a lot in advance

double *firstVal;
int secondVal
double thirdVal
int fourthVal

firstVal = new double[secondVal]
*(firstVal + thirdVal) = fourthVal

delete [] firstVal

[Jon Skeet [C# MVP]]

Re: C# equivalent syntax

C# newcomer <anonymous@disc ussions.microso ft.com> wrote:[color=blue]
> Please help me with the C# equivalent syntax for the
> following C++ code. Thanks a lot in advance.
>
> double *firstVal;
> int secondVal;
> double thirdVal;
> int fourthVal;
>
> firstVal = new double[secondVal];
> *(firstVal + thirdVal) = fourthVal;
>
> delete [] firstVal;[/color]

Converting bare syntax is rarely a good idea, especially in thise case
where there isn't necessarily an equivalent. Instead, tell us what
you're trying to do and we can tell you what idiom is usually used in
C#.

--
Jon Skeet - <skeet@pobox.co m>

http://www.pobox.com/~skeet

If replying to the group, please do not mail me too

[Stoitcho Goutsev \(100\) [C# MVP]]

Re: C# equivalent syntax

Hi C# newcomer,
Welcome to C# :)
[color=blue]
> double *firstVal;[/color]
you can't use pointers anymore. You have to use indeces to access items[color=blue]
> int secondVal;
> double thirdVal;
> int fourthVal;
>
> firstVal = new double[secondVal];
> *(firstVal + thirdVal) = fourthVal;
>
> delete [] firstVal;[/color]

int firstVal;
int secondVal;
double thirdVal;
int fourthVal;

//I assume all valrirables are initialized
firstVal = 0;
double[] doubleArray = new double[secondVal];
doubleArray[firstVal + thirdVal] = fourthVal;

Pay attention that the firstVal is index rather than pointer. This could
affect your program logic.

--
B\rgds
100
"C# newcomer" <anonymous@disc ussions.microso ft.com> wrote in message
news:6e3001c3e6 85$3d56bf80$a60 1280a@phx.gbl.. .[color=blue]
> Hi all
> Please help me with the C# equivalent syntax for the
> following C++ code. Thanks a lot in advance.
>
> double *firstVal;
> int secondVal;
> double thirdVal;
> int fourthVal;
>
> firstVal = new double[secondVal];
> *(firstVal + thirdVal) = fourthVal;
>
> delete [] firstVal;[/color]

[Stoitcho Goutsev \(100\) [C# MVP]]

Re: C# equivalent syntax

This is code snippet, I believe, and it makes sense as so.

--
B\rgds
100
"Tu-Thach" <anonymous@disc ussions.microso ft.com> wrote in message
news:93EF0E49-2974-4319-8433-B86000089329@mi crosoft.com...[color=blue]
> Are we glad C# does not have those pointers! Anyways, that code does not[/color]
make much sense.[color=blue]
>
> Tu-Thach
>
> ----- C# newcomer wrote: -----
>
> Hi all
> Please help me with the C# equivalent syntax for the
> following C++ code. Thanks a lot in advance.
>
> double *firstVal;
> int secondVal;
> double thirdVal;
> int fourthVal;
>
> firstVal = new double[secondVal];
> *(firstVal + thirdVal) = fourthVal;
>
> delete [] firstVal;
>[/color]

[Tu-Thach]

Re: C# equivalent syntax

You either have to cast thirdVal to an int or declare it as an int otherwise this code will not work

Tu-Thac

----- Stoitcho Goutsev (100) [C# MVP] wrote: ----

Hi C# newcomer
Welcome to C# :
[color=blue]
> double *firstVal[/color]
you can't use pointers anymore. You have to use indeces to access item[color=blue]
> int secondVal
> double thirdVal
> int fourthVal[color=green]
>> firstVal = new double[secondVal][/color]
> *(firstVal + thirdVal) = fourthVal[color=green]
>> delete [] firstVal[/color][/color]

int firstVal
int secondVal
double thirdVal
int fourthVal

//I assume all valrirables are initialize
firstVal = 0
double[] doubleArray = new double[secondVal]
doubleArray[firstVal + thirdVal] = fourthVal

Pay attention that the firstVal is index rather than pointer. This coul
affect your program logic

--
B\rgd
10
"C# newcomer" <anonymous@disc ussions.microso ft.com> wrote in messag
news:6e3001c3e6 85$3d56bf80$a60 1280a@phx.gbl..[color=blue]
> Hi al
> Please help me with the C# equivalent syntax for th
> following C++ code. Thanks a lot in advance[color=green]
>> double *firstVal[/color]
> int secondVal
> double thirdVal
> int fourthVal[color=green]
>> firstVal = new double[secondVal][/color]
> *(firstVal + thirdVal) = fourthVal[color=green]
>> delete [] firstVal[/color][/color]

[phoenix]

Re: C# equivalent syntax


"Tu-Thach" <anonymous@disc ussions.microso ft.com> schreef in bericht
news:93EF0E49-2974-4319-8433-B86000089329@mi crosoft.com...[color=blue]
> Are we glad C# does not have those pointers! Anyways, that code does not[/color]
make much sense.[color=blue]
>
> Tu-Thach
>[/color]

I'm glad it still has those pointers when you really need them ...

Yves

[Stoitcho Goutsev \(100\) [C# MVP]]

Re: C# equivalent syntax

Oh, yes, sorry. I think it is and error in the original post and I missted
it.
Actually, I believe C# newcommer wanted to write
int thirdVal;
and
double fourtVal;.

Anyways I believe the question was prety clear, since it wasn't
what-is-wrong-with-my-code one.
--
B\rgds
100
"Tu-Thach" <tuthach@ongtec h.com> wrote in message
news:890CE033-3F1C-4B5F-BAB4-93D5BF2D9D3C@mi crosoft.com...[color=blue]
> You either have to cast thirdVal to an int or declare it as an int[/color]
otherwise this code will not work.[color=blue]
>
> Tu-Thach
>
> ----- Stoitcho Goutsev (100) [C# MVP] wrote: -----
>
> Hi C# newcomer,
> Welcome to C# :)
>[color=green]
> > double *firstVal;[/color]
> you can't use pointers anymore. You have to use indeces to access[/color]
items[color=blue][color=green]
> > int secondVal;
> > double thirdVal;
> > int fourthVal;[color=darkred]
> >> firstVal = new double[secondVal];[/color]
> > *(firstVal + thirdVal) = fourthVal;[color=darkred]
> >> delete [] firstVal;[/color][/color]
>
> int firstVal;
> int secondVal;
> double thirdVal;
> int fourthVal;
>
> //I assume all valrirables are initialized
> firstVal = 0;
> double[] doubleArray = new double[secondVal];
> doubleArray[firstVal + thirdVal] = fourthVal;
>
> Pay attention that the firstVal is index rather than pointer. This[/color]
could[color=blue]
> affect your program logic.
>
> --
> B\rgds
> 100
> "C# newcomer" <anonymous@disc ussions.microso ft.com> wrote in message
> news:6e3001c3e6 85$3d56bf80$a60 1280a@phx.gbl.. .[color=green]
> > Hi all
> > Please help me with the C# equivalent syntax for the
> > following C++ code. Thanks a lot in advance.[color=darkred]
> >> double *firstVal;[/color]
> > int secondVal;
> > double thirdVal;
> > int fourthVal;[color=darkred]
> >> firstVal = new double[secondVal];[/color]
> > *(firstVal + thirdVal) = fourthVal;[color=darkred]
> >> delete [] firstVal;[/color][/color]
>
>
>[/color]

[Ken Onweller \(.NET MCSD\)]

Re: C# equivalent syntax

double firstVal[];
int secondVal;
double thirdVal;
int fourthVal;

firstVal = new double[secondVal];
firstVal[thirdVal] = fourthVal;

"C# newcomer" <anonymous@disc ussions.microso ft.com> wrote in message
news:6e3001c3e6 85$3d56bf80$a60 1280a@phx.gbl.. .[color=blue]
> Hi all
> Please help me with the C# equivalent syntax for the
> following C++ code. Thanks a lot in advance.
>
> double *firstVal;
> int secondVal;
> double thirdVal;
> int fourthVal;
>
> firstVal = new double[secondVal];
> *(firstVal + thirdVal) = fourthVal;
>
> delete [] firstVal;[/color]

[Bruno Jouhier [MVP]]

Re: C# equivalent syntax

double[] firstVal;
int secondVal;
double thirdVal;
int fourthVal;

// secondVal, thirdVal and fourthVal must be set before the following lines,
otherwise the C# compiler will reject them.
firstVal = new double[secondVal];
// C++ version of following line would also benefit from the rewriting
below!
firstVal[(int)thirdVal] = fourthVal;
// no need to delete array, GC does it!

Morale: C# just forces you to write something that make sense (from a type
checking standpoint). You can forget about ugly pointer hacks (like
*(firstVal + thirdVal) -- does C++ really accept this without barking, seems
to me that an (int) cast would be necessary on thirdVal)

Bruno.

"C# newcomer" <anonymous@disc ussions.microso ft.com> a écrit dans le message
de news:6e3001c3e6 85$3d56bf80$a60 1280a@phx.gbl.. .[color=blue]
> Hi all
> Please help me with the C# equivalent syntax for the
> following C++ code. Thanks a lot in advance.
>
> double *firstVal;
> int secondVal;
> double thirdVal;
> int fourthVal;
>
> firstVal = new double[secondVal];
> *(firstVal + thirdVal) = fourthVal;
>
> delete [] firstVal;[/color]

[Stoitcho Goutsev \(100\) [C# MVP]]

Re: C# equivalent syntax

Hi Ken,
As long as it is a code snipped and we don't actually know how the code,
which simplification we have, works
lines like
*(firstVal + thirdVal) = fourthVal;

Makes me believe that the array is indexed changing both firstVal and
thirdVal
otherwise it would be
firstVal[thirdVal] = fourthVal;

That's way I believe we should keep virstVal as an index to the array and
have one separate array object

--
B\rgds
100
"Ken Onweller (.NET MCSD)" <anonymous@disc ussions.microso ft.com> wrote in
message news:exqpOTr5DH A.2556@TK2MSFTN GP09.phx.gbl...[color=blue]
> double firstVal[];
> int secondVal;
> double thirdVal;
> int fourthVal;
>
> firstVal = new double[secondVal];
> firstVal[thirdVal] = fourthVal;
>
> "C# newcomer" <anonymous@disc ussions.microso ft.com> wrote in message
> news:6e3001c3e6 85$3d56bf80$a60 1280a@phx.gbl.. .[color=green]
> > Hi all
> > Please help me with the C# equivalent syntax for the
> > following C++ code. Thanks a lot in advance.
> >
> > double *firstVal;
> > int secondVal;
> > double thirdVal;
> > int fourthVal;
> >
> > firstVal = new double[secondVal];
> > *(firstVal + thirdVal) = fourthVal;
> >
> > delete [] firstVal;[/color]
>
>[/color]