Question

Why can’t I compile/run this non-CLR program in VC++ 2008?

How to do it?

MyProgram.cpp

#include <iostream>

namespace System
{
    public class Console
    {
    public:
        static void WriteLine(char str[])
        {
            std::cout<<str;
        }
    };
}

int main()
{    
    System::Console::WriteLine("This a non-CLR program!");
}

Error

Error   1   error C3381: 
'System::Console' : assembly access specifiers are only 
available in code compiled with a /clr option   
e:\...\MyProgram.cpp    6

Answer 1

That isn’t a non-CLR C++ program. In proper C++, classes cannot be public (or private). You want:

namespace System
{
    class Console
    {
    public:
        static void WriteLine(char str[])
        {
            std::cout<<str;
        }
    };
}

Also in C++ character literals are const, so your function should be:

static void WriteLine( const char * str)

if you want to call it with one as a parameter.