I see some possible errors there.
First is You have to create a project with Your IDE.
There was normally a project file created, without Your knowlegde.
The name and the ending depends of Your IDE.
In a section of this project file is the startfile declared ( normally main.c ).
This is the startpoint of compiling.
Additional i would write the shift options into brackets.
You wrote
DDRC |= 1<<PC0;
I'll suggest
DDRC |=( 1<<PC0);
AVR GCC want to have a void here
int main(void)
When all having done this, it should compile and work.