Multidimensional Arrays on the free store

[Cameron]

Anyone know how you put multidimensional arrays on the free store?
singles work fine but I get conversion errors when I try to specify
the second, that is...

grid_cell *cells2 = new grid_cell[64];

is fine but...

grid_cell *cells2 = new grid_cell[64][64];

gives the error...

cannot convert from 'struct grid_cell (*)[64]' to 'struct grid_cell *'

I'm guessing there is a rather simple solution to this but for the life
of me it doesn't want to present its self.

 

[Richard Pennington]

Anyone know how you put multidimensional arrays on the free store?
singles work fine but I get conversion errors when I try to specify
the second, that is...

grid_cell *cells2 = new grid_cell[64];

is fine but...

grid_cell *cells2 = new grid_cell[64][64];

gives the error...

cannot convert from 'struct grid_cell (*)[64]' to 'struct grid_cell *'

I'm guessing there is a rather simple solution to this but for the life
of me it doesn't want to present its self.

Deja Vu from today on comp.language.c. ;-)

grid_cell (*cells2)[64] = new grid_cell[64][64];

-Rich

 

[William Payne]

Anyone know how you put multidimensional arrays on the free store?
singles work fine but I get conversion errors when I try to specify
the second, that is...

grid_cell *cells2 = new grid_cell[64];

is fine but...

grid_cell *cells2 = new grid_cell[64][64];

gives the error...

cannot convert from 'struct grid_cell (*)[64]' to 'struct grid_cell *'

I'm guessing there is a rather simple solution to this but for the life of
me it doesn't want to present its self.

Well, say you want a two-dimensional array of chars allocated dynamically. I
would declare a pointer-to-a-pointer-to-char and allocate an array of
pointers. Then I would loop through the array an allocate space for each
pointer. When you deallocate, you loop through the elements first.

char** foo;
foo = new char*[64];
for(int i = 0; i < 64; ++i)
{
foo = new char[64];
}

/ WP

 

[Mike Wahler]

Anyone know how you put multidimensional arrays on the free store?
singles work fine but I get conversion errors when I try to specify
the second, that is...

grid_cell *cells2 = new grid_cell[64];

is fine but...

grid_cell *cells2 = new grid_cell[64][64];

gives the error...

cannot convert from 'struct grid_cell (*)[64]' to 'struct grid_cell *'

I'm guessing there is a rather simple solution to this but for the life
of me it doesn't want to present its self.

http://www.parashift.com/c++-faq-lite/freestore-mgmt.html#faq-16.15

-Mike

 

[Cameron]

Anyone know how you put multidimensional arrays on the free store?
singles work fine but I get conversion errors when I try to specify
the second, that is...

grid_cell *cells2 = new grid_cell[64];

is fine but...

grid_cell *cells2 = new grid_cell[64][64];

gives the error...

cannot convert from 'struct grid_cell (*)[64]' to 'struct grid_cell *'

I'm guessing there is a rather simple solution to this but for the life
of me it doesn't want to present its self.

http://www.parashift.com/c++-faq-lite/freestore-mgmt.html#faq-16.15

-Mike

Many thanksI bookmarked that link it's just what I wanted, and thanks to
everyone else that replied

~Cameron