[Hampshire] C dialects

Hi all

I'm learning C and having a few problems. I have a nice CBT course which is teaching Bloodshed Dev C++ - but trying a basic helloworld.c works fine on Dev but not on gcc.

I guess I'll be doing any serious programming on gcc as opposed to Dev (never heard of Dev before this CBT) - but can anyone recommend some tips / tricks for moving between gcc code and other C code?

For instance Dev is happy with

main()
{
code
}

but gcc won't have that, it insists on

main (void)
{
code
}

A small difference - but most irritating if you're very new to C as I am.

Cheers
Rob