How-to Design full adder for three 8-bit numbers

[mithrandir]

How-to Design full adder

I am new to digital design.I want to implement a mean filter in altera software and i need to make a full adder for three 8-bit numbers.
How am i supposed to design the adder?Has anyone seen something like that in a book?

 

[tlp71@hotmail.com]

if you use a programmable logic and you use vhdl or verilog you must define a vector of 9 bits.
when you add you 3 8 bits you have the carry gratis.
bye.
G.