array of structs

[Kenny McCarty]

I am trying to create an array of structs and I am having problems
adding the values into the structure itself. Here is the code:

struct predefinedCaptu reSetting
{
int buffer_signal;
int transform_signa l;
bool only_solid;
bool line_as_solid;
bool no_texture;
bool optimize_geomet ry;
bool recompute_norma ls;
bool last_frame;
};

predefinedCaptu reSetting PredefinedSetti ng[25];
PredefinedSetti ng[0] = {1,0,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[1] = {1,1,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[2] = {0,1,false,fals e,false,true,tr ue,false};
....
....
PredefinedSetti ng[22] = {1,1,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[23] = {1,0,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[24] = {1,1,false,fals e,false,true,tr ue,false};
Is there any reason why the above code wouldn't work? Thanks for any
help

[Michael Mellor]

Kenny McCarty wrote:

I am trying to create an array of structs and I am having problems
adding the values into the structure itself. Here is the code:

struct predefinedCaptu reSetting
{
int buffer_signal;
int transform_signa l;
bool only_solid;
bool line_as_solid;
bool no_texture;
bool optimize_geomet ry;
bool recompute_norma ls;
bool last_frame;
};

predefinedCaptu reSetting PredefinedSetti ng[25];
PredefinedSetti ng[0] = {1,0,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[1] = {1,1,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[2] = {0,1,false,fals e,false,true,tr ue,false};
...
...
PredefinedSetti ng[22] = {1,1,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[23] = {1,0,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[24] = {1,1,false,fals e,false,true,tr ue,false};
Is there any reason why the above code wouldn't work? Thanks for any
help

Try the following:

predefinedCaptu reSetting PredefinedSetti ng[25] =
{
{1,0,false,fals e,false,true,tr ue,false},
{1,1,false,fals e,false,true,tr ue,false},
{0,1,false,fals e,false,true,tr ue,false},
....
{1,1,false,fals e,false,true,tr ue,false},
{1,0,false,fals e,false,true,tr ue,false},
{1,1,false,fals e,false,true,tr ue,false}
};

Michael Mellor

[Karl Heinz Buchegger]

Kenny McCarty wrote:

I am trying to create an array of structs and I am having problems
adding the values into the structure itself. Here is the code:

struct predefinedCaptu reSetting
{
int buffer_signal;
int transform_signa l;
bool only_solid;
bool line_as_solid;
bool no_texture;
bool optimize_geomet ry;
bool recompute_norma ls;
bool last_frame;
};

predefinedCaptu reSetting PredefinedSetti ng[25];
PredefinedSetti ng[0] = {1,0,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[1] = {1,1,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[2] = {0,1,false,fals e,false,true,tr ue,false};
...
...
PredefinedSetti ng[22] = {1,1,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[23] = {1,0,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[24] = {1,1,false,fals e,false,true,tr ue,false};

Is there any reason why the above code wouldn't work?

Sure.
The thing on the right side of the assignment isn't a struct
it is just a list of numbers and boolean values seperated
by comma and enclosed in { }.

But you can change that.
Give that structure a constructor (Surprise: yes you can do that.
In C++ there is no difference of a class and a struct except that
in a struct everything is public while in a class it is private and
inheritance is again public for structs by default while it is
private for a class).

struct predefinedCaptu reSetting
{
predefinedCaptu reSetting( int buffer, int transform, bool only, bool line, bool no_text,
bool opt, bool recompute, bool last )
: buffer_signal( buffer ),
transform_signa l( transform ),
only_solid( only ),
line_as_solid( line ),
no_texture( no_text ),
optimize_geomet ry( opt ),
recompute_norma ls( recompute ),
last_frame( last )
{}

int buffer_signal;
int transform_signa l;
bool only_solid;
bool line_as_solid;
bool no_texture;
bool optimize_geomet ry;
bool recompute_norma ls;
bool last_frame;
};

Then you can write:

PredefinedSetti ng[0] = predefinedCaptu reSetting( 1,0,false,false ,false,true,tru e,false );
May I ask which text book you are using?
Just that we start warning others about a C++ textbook which
hasn't a chapter on constructors.

--
Karl Heinz Buchegger
kb******@gascad .at

[Deming He]

Kenny McCarty <ke***@barmeist er.com> wrote in message
news:58******** *************** ***@posting.goo gle.com...

I am trying to create an array of structs and I am having problems
adding the values into the structure itself. Here is the code:

struct predefinedCaptu reSetting
{
int buffer_signal;
int transform_signa l;
bool only_solid;
bool line_as_solid;
bool no_texture;
bool optimize_geomet ry;
bool recompute_norma ls;
bool last_frame;
};

predefinedCaptu reSetting PredefinedSetti ng[25];
PredefinedSetti ng[0] = {1,0,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[1] = {1,1,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[2] = {0,1,false,fals e,false,true,tr ue,false};
...
...
PredefinedSetti ng[22] = {1,1,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[23] = {1,0,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[24] = {1,1,false,fals e,false,true,tr ue,false};
Is there any reason why the above code wouldn't work? Thanks for any
help

Note that predefinedCaptu reSetting's fields are shrinked and the array,
PredefinedSetti ng's size reduced just to show an example.

struct predefinedCaptu reSetting
{
int buffer_signal;
int transform_signa l;
bool only_solid;

predefinedCaptu reSetting(int buf = 1, int tra = 1, bool onl = false) :
buffer_signal(b uf), transform_signa l(tra), only_solid(onl) {}
};

predefinedCaptu reSetting PredefinedSetti ng[3] =
predefinedCaptu reSetting(1,0,f alse),
predefinedCaptu reSetting(0,0,f alse),
predefinedCaptu reSetting(0,1,f alse) };

[Jerry Coffin]

In article <58************ **************@ posting.google. com>,
ke***@barmeiste r.com says...

[ ... ]

predefinedCaptu reSetting PredefinedSetti ng[25];
PredefinedSetti ng[0] = {1,0,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[1] = {1,1,false,fals e,false,true,tr ue,false};
PredefinedSetti ng[2] = {0,1,false,fals e,false,true,tr ue,false};

This syntax only works for initialization, not assignment, so you can do
this:

predefinedCaptu reSetting PredefinedSetti ng[25] = {
{1, 0, false, false, false, true, true, false},
{1, 1, false, false, false, true, true, false},

and so on for all 25 items, or you can do something like:

PredefinedSetti ng[0] =
PredefinedCaptu reSetting(1, 0, false, false, false, true, true, false);

and so on for 25 values.

On a different note, I think I'd define things a bit differently. I'd
probably define the bools as an int (or short, or whatever) and define
some names for bit positions, so your first item would be something
along this line:

Predef[0] = Setting(1, 0, OPTIMIZE_GEOMET RY | RECOMPUTE_NORMA LS);

At least to me, "OPTIMIZE_GEOME TRY | RECOMPUTE_NORMA LS" seems quite a
bit more meaningful than "false, false, false, true, true, false". The
latter is meaningful ONLY if somebody has memorized the order in which
you've arranged the fields -- and even then, you just about have to
count over to be sure whether a particular "true" is in the third or
fourth position (and adding even a couple more possibilities renders it
much more difficult still).

--
Later,
Jerry.

The universe is a figment of its own imagination.

[Kenny McCarty]

Thank you everyone for your help. It has been a long time since I
last did any C++ coding so I was a little but rusty :-)