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How to Use .NET to compile C++ code

Posted on 2004-09-18
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Last Modified: 2010-04-24
Hi I'm new to .Net and C++
I am trying to use .Net to compile my C++ code.  Does anyone know how to do this?  I'm not sure where to begin.

Thanks
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Question by:BBrian
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15 Comments
 
LVL 55

Expert Comment

by:Jaime Olivares
ID: 12093496
If your C++ is standard, non managed C++. Then you can make it as usual. Create a new Project in File -> New -> Project -> Win32 console application (I guess your app is console based. If not, please advice)
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Expert Comment

by:axsaxs
ID: 12094560

If you download the .NET Framework (for instance here: http://msdn.microsoft.com/netframework/downloads/framework1_1redist/), after installing you will have the Microsoft C/C++ compiler, which is called "cl" and can compile standard C++ source code.

You can find compiler options here:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore/html/_core_compiler_reference.asp

Altough not 100% ANSI-ISO C++ compatible, this new version of the Microsoft C++ compiler is quite standard and offers, IMHO, some of the best optimizations in the "free" compilers market.

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Author Comment

by:BBrian
ID: 12103646
Here's the probem....when I paste this code..

#include <iostream.h>
void main ( )
{
      cout <<"Hello World"<< endl;
}


I get errors.  It doesn't recognize the iostream.h file.  It says there is no such file directory exists.

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LVL 55

Expert Comment

by:Jaime Olivares
ID: 12103698
type with:

#include <iostream>

don't use .h extension.
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Author Comment

by:BBrian
ID: 12104704
ok..i omitted the .h extention..but i still get..

There is no build command line to execute.
Performing Makefile project actions
GenTest2 : error PRJ0003 : Error spawning ''.
0
 
LVL 55

Expert Comment

by:Jaime Olivares
ID: 12104731
How have you created your project? which options?
0
 

Author Comment

by:BBrian
ID: 12105053
I chose...

1.  Visual C++ projects
2.  Under The General Tab...I selected...
     MakeProjectFile
3.  The wizard comes up..then I click finish
4.  Add a new item to the project
5.  I select a .cpp file


Then I paste this code into the .cpp file

#include <iostream>
void main ( )
{
      cout <<"Hello World"<< endl;
}


and i get the error..
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LVL 55

Expert Comment

by:Jaime Olivares
ID: 12105168
Yes, but which kind of project have selected in the Wizard? there are many. Mus be console application.
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Author Comment

by:BBrian
ID: 12106037
There are five tabs..

1.  .NET
2.  ALT
3.  MFC
4.  WIN32
5.  GENERAL

I most recently tried selecting general and then clicking on MakeProjectFile
but I also tried clicking on Win32 then clicking on Win32Console Project

I got the same error either way.

am I doing something wrong?
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LVL 55

Expert Comment

by:Jaime Olivares
ID: 12106088
for a win32Console, there is an option that says 'Simple hello world application", choose it, compile and run it. If succefull, replace main function internals with your code.
0
 

Author Comment

by:BBrian
ID: 12106669
I don't see that option.
0
 

Expert Comment

by:axsaxs
ID: 12109979
Ok. First of all correct the code:

#include <iostream>
void main ( )
{
     std::cout <<"Hello World"<< std::endl;

    char c;
    std::cin >> c; // just press any key
}

In fact you are using the std namespace. IMHO, forget the "Simple hello world"... it's better to learn to code from scratch!

Check out the steps:

1. New C++ project
2. New Win32 console project
3. Finish
4. Paste the code
5. Wipe out "precompiled headers" (Project/Properties then C/C++/Precompiled Headers choose: Not using precompiled headers)
6. Run/debug program.
7. Press any key + enter to exit



0
 

Author Comment

by:BBrian
ID: 12114484
Hey Axsaxs it worked....

I had to remove this code though..


#include "stdafx.h"

int _tmain(int argc, _TCHAR* argv[])
{
      return 0;
}

and replace it with my hello world code...


if I leave both in i get this error

Linking...
Win32ConsoleProject.obj : error LNK2005: _main already defined in HelloWorld.obj
Debug/Win32ConsoleProject.exe : fatal error LNK1169: one or more multiply defined symbols found
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Accepted Solution

by:
axsaxs earned 50 total points
ID: 12120571

That's because the "stdafx.h" is the include for the pre-compiled headers. It's not a bad thing to have pre-compiled headers (it can speed up things if your project grows large), but it is Microsoft-specific. So, I'd rather prefer not to have them. But, there are some techniques to have precompiled headers without the "stdafx.h", but that should be the answer to another question... ;)



0
 

Author Comment

by:BBrian
ID: 12124972
Thanks alot
0

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