473,406 Members | 2,387 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,406 software developers and data experts.

C++ in C#...

Hi,

i have a situation:

C++ class:
namespace Shape
{
public ref class Shape
{
protected:
String^ name;
String^ color;

public:
Shape(String^ name, String^ color)
{
this->name = name;
this->color = color;
}
String^ toString()
{
String^ s;
s->Format("shape name = %s, shape color = %c", name->ToCharArray(),
color->ToCharArray());
return s;
}
};
}

C#class:
namespace ManyDLLs
{
class Program
{
static void Main(string[] args)
{
Shape.Shape s = new Shape.Shape("ksztalt", "bialy");
Console.WriteLine("s: " + ((Shape.Shape)s).toString());

Console.ReadKey();
}
}
}

But it prints only "s:". :(.

Do you know what I did wrong?

--
Best regards,
Odwrotnie.
May 12 '06 #1
1 1367
Firts, you never assign to s, so you return a null reference.
Second, Format is a static method, though C++ allows you to call a static
method on an instance reference, you better call String::Format(....).
Third, the format specifiers %s and %c are not valid in C++/CLI, search the
MSDN docs for "Format specifiers", they are exactly the same as for C#.

s = String::Format("shape name = {0}, shape color = {1}",
name->ToCharArray(), color->ToCharArray());

Fourth, ToCharArray returns an array reference, the output of above will
look like this:
s:shape name = System.Char[] ....

I guess this is not what you are after.

Willy.
"odwrotnie" <kr*****@gazeta.pl> wrote in message
news:op.s9ge2g0rdvqlmf@celsius...
Hi,

i have a situation:

C++ class:
namespace Shape
{
public ref class Shape
{
protected:
String^ name;
String^ color;

public:
Shape(String^ name, String^ color)
{
this->name = name;
this->color = color;
}
String^ toString()
{
String^ s;
s->Format("shape name = %s, shape color = %c", name->ToCharArray(),
color->ToCharArray());
return s;
}
};
}

C#class:
namespace ManyDLLs
{
class Program
{
static void Main(string[] args)
{
Shape.Shape s = new Shape.Shape("ksztalt", "bialy");
Console.WriteLine("s: " + ((Shape.Shape)s).toString());

Console.ReadKey();
}
}
}

But it prints only "s:". :(.

Do you know what I did wrong?

--
Best regards,
Odwrotnie.
May 12 '06 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

3
by: William C. White | last post by:
Does anyone know of a way to use PHP /w Authorize.net AIM without using cURL? Our website is hosted on a shared drive and the webhost company doesn't installed additional software (such as cURL)...
2
by: Albert Ahtenberg | last post by:
Hello, I don't know if it is only me but I was sure that header("Location:url") redirects the browser instantly to URL, or at least stops the execution of the code. But appearantely it continues...
3
by: James | last post by:
Hi, I have a form with 2 fields. 'A' 'B' The user completes one of the fields and the form is submitted. On the results page I want to run a query, but this will change subject to which...
0
by: Ollivier Robert | last post by:
Hello, I'm trying to link PHP with Oracle 9.2.0/OCI8 with gcc 3.2.3 on a Solaris9 system. The link succeeds but everytime I try to run php, I get a SEGV from inside the libcnltsh.so library. ...
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
1
by: nemocccc | last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
0
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...
0
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
0
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
0
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...
0
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.