// half_adder.v  T. Manikas  2021 Dec 20
// half-adder circuit
// inputs are bits a and b
// outputs are sum bit s and carry-out bit co

module half_adder(s,co,a,b);
	input a,b;
	output s;	// sum
	output co;	// carry-out
	xor(s,a,b);
	and(co,a,b);
endmodule