Will console programs still work in WinXP x64?

I heard it doesn't support DOS anymore. Will this mean that all console programs will stop functioning, eg those cout<<"hello world" stuff?

if i remember correctly xp 32 doesn't support dos.
i thought dos was eliminated from the system as of the converstion from win 98 to xp.
the command line prompt is still available in xp 32.
i have not heard anything about it not being offered in the 64 version.
[edit1]
i just confirmed from msdn.com that the command line is still included in the 64 bit windows.
here is the link
http://www.microsoft.com/resources/d...en-us/mmc.mspx

i just talks about using the command line in the 64 bit windows.
[\edit1]

So my console-type programs will still work in XP x64? I'm too lazy to master the Win32 API yet.

Yes they will.

Will performance be greatly hit? Because the program I am writing is a benchmark program

A WIN32 console program isn't a DOS program. The differences between a WIN32 console program and a WIN32 GUI program is a linker switch which tells the linker to look for a main() or WinMain() function and sets a flag in the exe to tell the OS weather or not to allocate a console for the program.
I think exe files compiled for 32 bit windows would probably be run inside an emulator on 64 bit windows. The API is probably the same so you could recompile for 64 bit windows.

Mm ok, so it's a 32-bit program?

Yes, as long as your not using an old 16 bit compiler you will be creating a 32 bit program.

Your programs will not work, however, as native 64-bit programs if you make the wrong assumptions. For example, quite a few programs nowadays assume that they can cast a pointer to an int and back without bad things happening. On 64-bit, that's not possible.
Also, assumptions about the length of datatypes are bad. On 64-bit, the length of long will depend on the compiler: VC++ will make it 32 bits, gcc makes it 64 bits.