What wrong with this code?

#include <sstream>
#include <string>
using namespace std;

int main()
{
string a = ":)";
string b = "John";

Thank you!

I created project but it shows:
->header files:
stdafx.h
targetver.h
->Source files:
stdafx.cpp
test2.cpp


Why so many files in project if I need compile 1 file and I dont need that...

What project I need to create for simple c++ consule program?

what project if I need single file (consule aplication)

I have one *.cpp file but I cant it compile with MS VC++ ! How to compile signle .cpp file in VC++? Please help me!

Can you please tell me what editor/compiler you use?!

What compiler use to compile your code, I cant compile with gcc

Compiling: C:\Documents and Settings\a\Desktop\str.cpp
C:\Documents and Settings\a\Desktop\str.cpp:2:2: invalid preprocessing...

Hi!
Can anybody please help me to add many strings in one?
I tryied this
int a=4,b=5,c=6;
string d;
d = #a+" Hello "+#b+" bye "+c;

I want that d = 4 Hello 5 bye 6

Please help me!