Dynamic array and table?

[saneman]

std::vector<intv 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]

On Aug 11, 8:49*am, "saneman" <[e-mail]:

std::vector<intv 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-lit...html#faq-16.17

Cheers! --M

[Victor Bazarov]

saneman wrote:

std::vector<intv 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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I do not respond to top-posted replies, please don't ask

[saneman]

"Victor Bazarov" <v.********@comAcast.netskrev i en meddelelse
news:g7**********@news.datemas.de...

saneman wrote:

>std::vector<intv 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.