Best way to convert C to C++?
 

Could any of you give me any tips on how to most painlessly convert C to C++? I have this one eternity project and writing all over again manually doesn't sound fun.

I was thinking about using sed to convert syntax to C++ automagically, but that route has its own problems ofcourse.

If you have some witty sed scripts you'd like to share I'm not objecting against that. ;) Other ways to get the job done are appreciated as well.

Maybe this?

Why convert?
 

What do you need to convert? Can't you just keep all of your C code as C, and then write new pieces in C++ and use extern C references to call the C code?