64. Full Adder

How do you plan to solve it?

// Half Adder primitive
module half_adder (
    input  a, b,
    output sum, carry
);
    // Write code here
    assign sum = (a ^ b);
    assign carry = a & b;
endmodule

// Full Adder using 2 Half Adders
module full_adder_struct (
    input  a, b, cin,
    output sum, cout
);
    wire sum1, carry0, carry1;
    // Write code here
    half_adder fisrt_half (.a(a), .b(b), .sum(sum1), .carry(carry0));
    half_adder second_half (.a(sum1), .b(cin), .sum(sum), .carry(carry1));
    assign cout = carry0 | carry1;

endmodule