compilers

how do compilers work ?
i mean when you have say c or c++ code or lisp program, how does it turn it into machine code ?
isnt it too complicated and take a lot of machine code ?
or like scheme tail loop, how is it done . its hard to convert just one loop
or like c++ classes theres no clases in machine assmebly
i dont understand

thanks

My favorite part is "isnt it too complicated"

Yes, its so complicated compilers do NOT exist. But they do. HOLY FUCK! IMPERICAL EVIDENCE STATES THIS FAGGY ASSUMPTION IS WRONG.

BAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH!

butt hurt.