Dynamic array and table?

[saneman]

std::vector<int v creates a dynamic array where its possible to insert new
elements without doing any preallocation. But how about a dynamic double
array? I would like to have something like:


int M[a][b];

where a and b change be set during runtime and the size og M can vary, is
that possible?

[mlimber]

Re: Dynamic array and table?

On Aug 11, 8:49 am, "saneman" <as...@asd.comw rote:

std::vector<int v creates a dynamic array where its possible to insert new
elements without doing any preallocation. But how about a dynamic double
array? I would like to have something like:
>
int M[a][b];
>
where a and b change be set during runtime and the size og M can vary, is
that possible?

Try:

std::vector< std::vector<int M;

Depending on your application, there may be better ways to do it. See
also this FAQ and following:

http://www.parashift.com/c++-faq-lite/freestore-mgmt.html#faq-16.17

Cheers! --M

[Victor Bazarov]

Re: Dynamic array and table?

saneman wrote:

std::vector<int v creates a dynamic array where its possible to insert new
elements without doing any preallocation. But how about a dynamic double
array? I would like to have something like:
>
>
int M[a][b];
>
where a and b change be set during runtime and the size og M can vary, is
that possible?

It's not exactly equivalent, but you could try to get away with

std::vector<std ::vector<int M(a, std::vector<int >(b));

V
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[saneman]

Re: Dynamic array and table?


"Victor Bazarov" <v.Abazarov@com Acast.netskrev i en meddelelse
news:g7pd03$i60 $1@news.datemas .de...

saneman wrote:

>std::vector<in tv creates a dynamic array where its possible to insert
>new elements without doing any preallocation. But how about a dynamic
>double array? I would like to have something like:
>>
>>
>int M[a][b];
>>
>where a and b change be set during runtime and the size og M can vary, is
>that possible?

>
It's not exactly equivalent, but you could try to get away with
>
std::vector<std ::vector<int M(a, std::vector<int >(b));
>
V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask

Seems that boots:ublas has some dynamic vectors and matrices that I can use.