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Rory Walsh
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 Posted: Sat Mar 26, 2005 2:16 pm Post subject: vectors? |
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Hi, following on from a previous thread I just tried to run a simple
example application which uses vectors, I added the include<vector> but
I get a 'type name expected' error? Can anyone help me out? I'm asking
some very basic questions here, is this the right place to ask or am I
in the wrong list? Thanks for your help anyhow.
#include <vector>
//---------------------------------------------------------------------------
class TForm1 : public TForm
{
__published: // IDE-managed Components
private: // User declarations
public: // User declarations
__fastcall TForm1(TComponent* Owner);
vector <int> scores(50);
};
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Rory Walsh
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| Posted: Sat Mar 26, 2005 2:45 pm Post subject: Re: vectors? |
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thanks, now all I need to know is how to pass 50 to the constructor? I
don't know anything about vector's, apart from the fact that I can
insert and delete elements from anywhere without leaving holes. I have
searched the help but I cannot find what I need to do? Can you give me
the syntax? Is this the right syntax:
scores = new std::vector< >;
I just don't know what needs to be passed?
| Quote: | Yes, the vector template lives in the namespace std, along with most of
the rest of the standard library. Try:
std::vector< int > scores;
Note you must pass '50' to the constructor of the vector if you want to
create a vector with 50 ints all intialized to 0. You would do that in
the form's constructor, not in the header as you show above.
AlisdairM(TeamB)
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Duane Hebert
Guest
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| Posted: Sat Mar 26, 2005 2:58 pm Post subject: Re: vectors? |
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"Rory Walsh" <rorywalsh (AT) ear (DOT) ie> wrote
| Quote: | thanks, now all I need to know is how to pass 50 to the constructor? I
don't know anything about vector's, apart from the fact that I can
insert and delete elements from anywhere without leaving holes. I have
searched the help but I cannot find what I need to do? Can you give me
the syntax? Is this the right syntax:
scores = new std::vector< >;
I just don't know what needs to be passed?
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You can't assign a static instance of scores with
new.
Try in your ctor:
scores.resize(50);
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Rory Walsh
Guest
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| Posted: Sat Mar 26, 2005 3:17 pm Post subject: Re: vectors? |
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Great, that's sorted it out. Cheers,
Rory.
Duane Hebert wrote:
| Quote: | "Rory Walsh" <rorywalsh (AT) ear (DOT) ie> wrote
thanks, now all I need to know is how to pass 50 to the constructor? I
don't know anything about vector's, apart from the fact that I can
insert and delete elements from anywhere without leaving holes. I have
searched the help but I cannot find what I need to do? Can you give me
the syntax? Is this the right syntax:
scores = new std::vector< >;
I just don't know what needs to be passed?
You can't assign a static instance of scores with
new.
Try in your ctor:
scores.resize(50);
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