The very easy half adder

Activity 17:

Half adder. Add two bits together so a full adder should be four bits. Also a look ahead carry is not cover in the book so I will have to research that enough to be able to add it to my implementation. After reading the chapter more and reading supplement material I see now a full adder is just two bit’s with a carry(or three bits). But on with the half adder. Looks like it only uses two gates. Looking at the truth table for the half adder it should be obvious on how to make the half adder.  

INPUT		OUTPUT
a	b	carry	sum
0	0	0	0
0	1	0	1
1	0	0	1
1	1	1	0

P.S I really need to make an editor for the HDL language so all this can be done a lot faster instead of flipping back and forth for the syntax of each gate in the HDL language.