Solved

How to use operator == overloading and copy constructor in ActiveX control ?

Posted on 2004-04-04
2
310 Views
Last Modified: 2013-11-20
Hi All,
     This question is related to the class shown below. I used the following in the interface file (.idl) for making an ActiveX control in visual c++-

[id(1), helpstring("operator == overloading")] BOOL operator== (const Test& testObj);
[id(2), helpstring("addValue()")] HRESULT addValue(unsigned int value);
...
[id(4), helpstring("Test class copy constructor")] HRESULT Test(const Test& testObj);

While compiling, the compiler gives the error that operator== not allowed and also regarding the use of Test(const Test& ..). I have to use these two methods in making a activex control. Please suggest some method, tips so that I can use all the methods of Test class.
Please reply as quick as possible as it is urgent.

Thanks in advance,
Pawan
//Test class
#include <iostream>
#include <string>
using namespace std;

class Test
{
private:
    unsigned int total;
public:
    Test();
    ~Test();
    Test(const Test& testObj);
    void addValue(unsigned int value);
    unsigned int getValue();
    bool operator== (const Test& testObj);
};

Test::Test()
{
     total = 0;
}
Test::~Test()
{
}

Test::Test(const Test& testObj)
{
    this->total = testObj.total;
}

void Test::addValue(unsigned int value)
{
    total = total + value;
}

unsigned int Test::getValue()
{
    return total;
}

bool Test::operator==(const Test& testObj)
{
    if (this->total == testObj.total)
        return true;
    else
        return false;
0
Comment
Question by:pawantestaccount
2 Comments
 
LVL 16

Accepted Solution

by:
nonubik earned 125 total points
ID: 10755771
As far as I understand, you want to expose the operator== and copy constructor of Test class through some interface (e.g. ITest). An interface does not have a constructor, nor operator overloading. You  can define instead some methods like
HRESULT isEqual (.. , BOOL *pbEqual)
HRESUTL copy(.., Test **ppTest)
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Macro to save highlighted rows as a separate file 5 46
ORA-01403: no data found 43 111
tripleUp challenge 7 92
Dell Alienware Graphics Amplifier Driver for non-Alienware systems 18 454
Introduction: Database storage, where is the exe actually on the disc? Playing a game selected randomly (how to generate random numbers).  Error trapping with try..catch to help the code run even if something goes wrong. Continuing from the seve…
In this post we will learn different types of Android Layout and some basics of an Android App.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

679 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question