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fest
Joined: 07 Apr 2003
Posts: 187
Location: Madona
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 Posted: Tue Feb 21, 2006 3:13 pm Post subject: C++ definēt vektoru |
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Problēma:
Ir fails "SurfaceContainer.h":
| Code: |
#include "Base.h"
#include <NNEException.h>
class SurfaceContainer
{
private:
SDL_Surface* mSurf;
std::string mName;
public:
SurfaceContainer(const std::string& name, SDL_Surface* surf);
~SurfaceContainer(void);
std::string GetName();
void SetName(const std::string& name);
SDL_Surface* GetSurface();
void SetSurface(SDL_Surface* surf);
};
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Un otrs fails:
| Code: |
#include "Base.h"
#include "SurfaceContainer.h"
class ResourceManager
{
private:
std::vector<SurfaceContainer> mSurfaces;
[...]
|
Nu nekādīgi netieku gudrs, kapēc pie rindiņas std::vector<SurfaceContainer> mSurfaces;
VC++2005 Express izmet kļūdu:
| Quote: | Compiling...
SurfaceContainer.cpp
c:\fest\kugi\includes\ResourceManager.h(14) : error C2065: 'SurfaceContainer' : undeclared identifier
ResourceManager.cpp |
Inklūdošanā problēmu nav.
Droši vien iemesls ir pavisam vienkāršs, bet mans pods to nevar izdomāt ;(
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BHC
Joined: 31 Jan 2006
Posts: 81
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| Posted: Tue Feb 21, 2006 4:39 pm Post subject: |
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c:\fest\kugi\includes\ResourceManager.h(14) : error C2065: 'SurfaceContainer' : undeclared identifier
Tu taču kļūdu māki izlasīt,
SurfaceContainer nav piedefinēts.
Manuprāt, viens no iemesliem varētu būt "samuģināts, ciklisks inklude". Tas, ka:
| Code: |
#include "Base.h"
#include <NNEException.h>
class SurfaceContainer
{
private:
SDL_Surface* mSurf;
std::string mName;
public:
SurfaceContainer(const std::string& name, SDL_Surface* surf);
~SurfaceContainer(void);
std::string GetName();
void SetName(const std::string& name);
SDL_Surface* GetSurface();
void SetSurface(SDL_Surface* surf);
}; |
Base.h inkludē "ResourceManager.h", kas noved pie tā, ka SurfaceContainer tiek definēts pēc ResourceManager.
Uztaisi vienkārši forwārd definīciju.
Kā:
class SurfaceContainer;
class ResourceManager
{
private:
std::vector<SurfaceContainer> mSurfaces;
[...]
Tagad apraksti(inkludē) pašu SurfaceContainer interfeisu.
Citu saprātīgu iemeslu pēc dotā koda nevaru izlobīt.
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Last edited by BHC on Tue Feb 21, 2006 4:44 pm; edited 1 time in total |
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fest
Joined: 07 Apr 2003
Posts: 187
Location: Madona
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| Posted: Tue Feb 21, 2006 4:44 pm Post subject: |
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BHC paldies, tas atrisināja kļūdu 
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bubu
Indago Uzvarētājs
Joined: 23 Mar 2004
Posts: 3223
Location: Riga
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| Posted: Tue Feb 21, 2006 4:59 pm Post subject: |
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| Vai tad forward deklaraacijas var likt lietaa, ja vajadziigi klases pointeri, nevis pashi klases (jaazin tachu klases aiznjemtais izmeers vektoram)? |
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BHC
Joined: 31 Jan 2006
Posts: 81
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| Posted: Tue Feb 21, 2006 5:00 pm Post subject: |
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| bubu wrote: | | Vai tad forward deklaraacijas var likt lietaa, ja vajadziigi klases pointeri, nevis pashi klases (jaazin tachu klases aiznjemtais izmeers vektoram)? |
Un vai tad nevar?
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bubu
Indago Uzvarētājs
Joined: 23 Mar 2004
Posts: 3223
Location: Riga
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| Posted: Tue Feb 21, 2006 5:08 pm Post subject: |
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| Var gan, padomaaju un sapratu, ka saputrojos ar vienu citu lietu, ko domaaju. |
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BHC
Joined: 31 Jan 2006
Posts: 81
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| Posted: Tue Feb 21, 2006 5:19 pm Post subject: |
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Tu laikam domāji, ka nevar rakstīt šādi:
| Code: |
class bekons; // deklarējam bekonu
class ruksis
{
bekons c; // NEVAR, bekons nav definēts
public:
void lol()
{
int a = sizeof(bekons); // NEVAR, bekons nav definēts
}
};
class bekons // piedefinējam bekonu
{
};
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Bet var rakstīt šādi:
| Code: |
class bekons; // bekons deklarējas
class ruksis
{
bekons * a; // VAR, bet new operātoru gan mēs varēsim izmantot tikai pēc bekona definīcijas, kad zināsim, cik šis garš
public:
void lol();
};
class bekons // bekons tiek definēts
{
};
void ruksis::lol()
{
int z = sizeof(bekons); // VAR, bekons definēts
a = new bekons; // VAR, bekons definēts
}
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Tā?
Galvenais nejaukt definīciju ar deklerāciju, divi līdzīgi, bet ne vienādi termini. Bieži tiek jaukti.
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bubu
Indago Uzvarētājs
Joined: 23 Mar 2004
Posts: 3223
Location: Riga
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| Posted: Wed Feb 22, 2006 10:31 am Post subject: |
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Tā arī domāju. Un vēl arī šādi:
| Code: | class Bekons;
int funka(Bekons bek)
{
...
} |
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