Full added circuit have three inputs as switch and two outputs one is sum (XOR Gate) and curry (AND Gate) .
The truth table of inputs and outputs.
A B C S C.
0 0 0 0 0
0 0 1 1 0
0 1 0 1 0
0 1 1 0 1
1 0 0 1 0
1 0 1 0 1
1 1 0 0 1
1 1 1 1 1
A input
B input
C input
S sum
C. Curry