dynamic array of type

[FantastichenEin]

Private Type tData
    Label As String
    Data As String
End Type


Private Sub Form_Load()
    Dim arrData() As tData
End Sub

I want to do the same as above in c++ (i.e. a dynamic array that holds a struct). I realise I'll be using a struct and vector but I cannot work out the implementation.

Please can somebody give me a few ideas...

Many thanks

[HairyDave]

struct
{
int *someInts;
char *someChars;
long count;
}myStruct;

.....
// Some code
myStruct *theStruct = new myStruct[872893];
// Some more code

This is for dynamic arrays.
For vectors I think:

typedef vector<myStruct> myVector;

myVector haha;

haha.push_back(...)

And so on. It's the struct and typedef that matter. Declare the struct - or class - or whatever - then declare the vector using a typedef:

typedef vector<Type> VectorTypeName;

There you go. If my stuff is bad programming, don't worry as structs and vectors are detailed in the MSDN library.

OK?

HD

[parksie]

For Label and Data, I'd use the string class rather than a char* pointer.

[FantastichenEin]

Thanks for the replies.

I am still having trouble though:

I have the following class:

#ifndef __CCONFIG_H__
#define __CCONFIG_H__

#include "CFile.h"
#include <vector>


class CConfig
{
public:
	int Parse(const std::string &path);
	struct CONFIG {std::string Label; std::string Value;};

private:
	std::vector<CONFIG> config();
};


#endif //__CCONFIG_H__

I need to know how I can access this from the class implmenatation to add elements to the vector.

Something like this? this->config[1].Label = "Label1";

many thanks...

[HairyDave]

I think that this:

std::vector<CONFIG> config();

needs to be changed to this:

typedef std::vector<CONFIG> config;

This defines that a vector containing elements of type CONFIG exists and has type config.

You have to initialise this:

config myConfigVector;

Then to add items you can use:

CONFIG thisConfig;
myConfigVector.push_back(thisConfig);

All this information on Vectors can be found in MSDN.

HD

[FantastichenEin]

many thanks guys. works like a dream.

don't need any typedefs though...

[HairyDave]

No problem. I'm so used to typedefs from C that I automatically do them.

HD

[CornedBee]

You don't need the typedefs, but they shorten your code and make it more readable.