MFC is strange to me, more is to learn c #, hope everybody who help to solve the following problems, especially the understanding on the error must be pointed out that

//CArrayDemo. CPP: defines the entry point of the console application, 
//

# include "stdafx. H" 
# include "CArrayDemo. H" 

# ifdef _DEBUG 
# define new DEBUG_NEW 
# endif 


//the only application objects 

CWinApp theApp; 

using namespace std; 

Class A 
{
Public: 
A (int I LPCTSTR b) 
: (I) (I) 
, b (b) 
{

} 
Const int I; 
Private: 
LPCTSTR b; 
}; 

Int _tmain (int arg c, TCHAR * argv [], TCHAR * envp []) 
{
Int nRetCode=0; 
HMODULE HMODULE=: : GetModuleHandle (NULL); 

If (hModule!=NULL) 
{
//initialize the MFC and display an error when failure 
if (! AfxWinInit (hModule, NULL, : : GetCommandLine (), 0)) 
{
//TODO: change the error code to fit your needs 
_tprintf (_T (" error: [English] failed to initiate the MFC \ n ")); 
NRetCode=1; 
} 
The else 
{
//TODO: here is the behavior of the application code, 
CArray Aarray; 
} 
} 
The else 
{
//TODO: change the error code to fit your needs 
_tprintf (_T (" error: GetModuleHandle failed \ n ")); 
NRetCode=1; 
} 

Return nRetCode; 
} 

Error 1 error C2512: "A" : no suitable default constructor available c: \ program files \ Microsoft visual studio 10.0 \ \ vc atlmfc \ include \ afxtempl h 401 1 CArrayDemo
Error 2 error C2512: "A" : no suitable default constructor available c: \ program files \ Microsoft visual studio 10.0 \ \ vc atlmfc \ include \ afxtempl h 416 1 CArrayDemo
Mistake 3 error C2512: "A" : no suitable default constructor available c: \ program files \ Microsoft visual studio 10.0 \ \ vc atlmfc \ include \ afxtempl h 464 1 CArrayDemo
According to the above error I'm afxtempl. H in the void CArray CodePudding user response:

CArray Aarray; Change
CArray CodePudding user response:

You can this definition is,
Aarray. InsertAt or aarray. Add (,,) that can Add elements to an array, such as

But, your class A must add A function
LPCSTSR void ChangeData (int x, p)//this function can modify the content of A
{
I=a;
B=p;
}

Then where you use the

CArray Arr.
A, A.
Arr. ChangeData (x1, p1);//change data
Arr. Add (a);//add a to the array
.
Arr. ChangeData (xn, pn);
Arr. Add (a);

CodePudding user response:

Void A: : ChangeData (int x, LPCSTSR p)//this function can modify the content of A
{
I=a;
B=p;
}

CodePudding user response:

CArray SetSize have A new operation, therefore A need to have A constructor with no parameters () A: I (0), b (0) {}

Or CTypedPtrArray< pointer way; CPtrArray, A * & gt; Parray; His new delete

CodePudding user response:

CArray Aarray;
Behind directly defined as member variables, and then it can be used to Add to Add elements