VC++ 100% N00B question

Question

Hey there,

I am learning VC++ and trying to learn about reference types, but I keep getting this error: Can someone point me in the right direction?

1>------ Build started: Project: TestCLR, Configuration: Debug Win32 ------

1> MyClass.cpp

1>MyClass.cpp(5): error C2533: 'MyClass::{ctor}' : constructors not allowed a return type

1> TestCLR.cpp

1>TestCLR.cpp(6): error C2143: syntax error : missing ';' before 'using'

1> Generating Code...

========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

 

MyClass.h

#pragma once

Using namespace System;

Ref class MyClass{

Private:

int m_Value;

Public:

MyClass(int);

!MyClass();

Int get_Value();

};

MyClass.cpp

#include “stdafx.h”

#include “MyClass.h”

MyClass::MyClass(int x)

{ m_Value=x;

}

MyClass::!MyClass()

{

       Console::WriteLine(“Class finalizing (deleted)”);

}

Int MyClass::get_Value(){ return m_Value;}

RefType_2_Example.cpp

#include “stadafx.h”

#include “MyClass.h”

Using namespace System;

Int main(array<System::String^>^args)

{

       MyClass ^m_Obj = gcnew MyClass(4);

       Console::WriteLine(m_Obj->get_Value());

       m_Obj= nullptr;

GC::Collect();

Console::WriteLine(“All done!”);

Return 0;

}

Answer 1

CAAMSA wrote:

I am learning VC++ and trying to learn about reference types, but I  keep getting this error: Can someone point me in the right
direction?

1>MyClass.cpp(5): error C2533: 'MyClass::{ctor}' : constructors not  allowed a return type

MyClass.h
Ref class MyClass{
};

Double-check that you do have this last semicolon in your actual code.  The error message suggests that you don't.

---

Igor Tandetnik

Answer 2

When you post code in these forums always use copy & paste
to post the *actual* code you are trying to compile. Don't
try to type it in again into a message, as that often
results in changes that aren't in the real code.

Some obvious errors that would cause a bunch of compile
errors:

>#include “stadafx.h”
>#include “MyClass.h”
>Console::WriteLine(“Class finalizing (deleted)”);
>Console::WriteLine(“All done!”);

All of these use the wrong double quote character.

>Using namespace System;

This is wrong. It should be

using namespace System;

>Ref class MyClass{

This is wrong. It should be:

ref class MyClass{

>Private:

This is wrong. It should be:

private:

>Public:

This is wrong. It should be:

public:

etc.

- Wayne

Answer 3

Also, this:

RefType_2_Example.cpp

#include “stadafx.h”

has the wrong file name: stadafx.h

It should be: stdafx.h

- Wayne

Answer 4

And this:

>Int get_Value();

There is no type Int. It should be:

int get_Value();

When programming, accuracy is *vital*.
You *must* be precise.

- Wayne

Answer 5

Some more:

>Int main(array<System::String^>^args)

Again, there is no type Int. It should be:

int main(array<System::String^>^args)

>Return 0;

Wrong. Should be:

return 0;

- Wayne

Answer 6

Hi CAAMSA,

I agree with WayneAKing. There are some typo in the code snippets you posted. I have created a CLR Console Application, and added a new class named MyClass into it. In the project, I tried your codes. Finally the project can run without errors. Please refer to the following codes for more information.
MyClass.h file:

#pragma once
using namespace System;
ref class MyClass
{
private: int m_Value;
public:
	MyClass(void);
	MyClass(int);
	!MyClass();
	int getValue();
};

MyClass.cpp file:

#include "StdAfx.h"
#include "MyClass.h"

MyClass::MyClass(void)
{
}
MyClass::MyClass(int x)
{
	m_Value=x;
}
MyClass::!MyClass()
{
	Console::WriteLine("Class finalizing (deleted)");
}
int MyClass::getValue()
{
	return m_Value;
}

main.cpp file:

#include "stdafx.h"
#include "MyClass.h"
using namespace System;

int main(array<System::String ^> ^args)
{
	MyClass^ m_Obj=gcnew MyClass(4);
	Console::WriteLine(m_Obj->getValue());
	m_Obj=nullptr; 
	GC::Collect();
	Console::WriteLine("All done!");	
        return 0;
}

I hope you can find useful information from this reply. By the way, please mark the reply which helps you as answer.

Thanks for your post in the MSDN Forum.
Have a nice day!

---

Helen Zhao [MSFT]
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