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 s0,c0,c1;
    half_adder u1(.a(a),.b(b),.sum(s0),.carry(c0));
    half_adder u2(.a(s0),.b(cin),.sum(sum),.carry(c1));
    xor u3(cout,c0,c1);


endmodule