`timescale 1ns/100ps

module adder_1bit(sum, cout, in1, in2, cin);

        input   in1;
        input   in2;
        input   cin;

        output  sum;
        output  cout;

        assign cout = (in1 & in2) | (in1 & cin) | (in2 & cin);
        assign sum = in1 ^ in2 ^ cin;

endmodule