почему c++ 2010 не работает???

# include
main()
{
cout<<"HELLO WORLD!";
return 0;
}

1>------Build started: Project: aassdd, Configuration: Debug Win32 ------
1> stdafx.cpp
1> sddda.cpp
1>c:\documents and settings\user\мои документы\visual studio 2010\projects\aassdd\aassdd\sddda.cpp(1): warning C4627: '#include ': skipped when looking for precompiled header use
1> Add directive to 'StdAfx.h' or rebuild precompiled header
1>c:\documents and settings\user\мои документы\visual studio 2010\projects\aassdd\aassdd\sddda.cpp(7): fatal error C1010: unexpected end of file while looking for precompiled header. Did you forget to add '#include "StdAfx.h"' to your source?
1> aassdd.cpp
1> Generating Code...
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========