// This example implements a full adder using a truth table
// to describe the logic functions.  This is a very useful
// method for many functions
// Note that we use a 2-bit bus for the sum and carry output
module fullAdder(
	input a,
	input b,
	input c,
	output [1:0] out);	  // Sum, Carry
	
	wire [2:0] in = {a,b,c};  // make in a 3-bit bus connected to a, b, c
	assign out = (in == 3'b000) ? 2'b00 :
	             (in == 3'b001) ? 2'b01 :
	             (in == 3'b010) ? 2'b01 :
	             (in == 3'b011) ? 2'b10 :
	             (in == 3'b100) ? 2'b01 :
	             (in == 3'b101) ? 2'b10 :
	             (in == 3'b110) ? 2'b10 :
	             (in == 3'b111) ? 2'b11 : 0;	
endmodule