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
);
    // Write code here
 wire w1,w2,w3;
 half_adder hf1 (.a(a),.b(b),.sum(w1),.carry(w2));
 half_adder hf2 (.a(w1),.b(cin),.sum(sum),.carry(w3));
 assign cout = (w2|w3);


endmodule