64. Full Adder

How do you plan to solve it?

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

// Full Adder using 2 Half Adders
module full_adder_struct (
    input  a, b, cin,
    output sum, cout
);wire s1,c1,c2;
    half_adder u1(.a(a),.b(b),.sum(s1),.carry(c1));
    half_adder u2(.a(s1),.b(cin),.sum(sum),.carry(c2));
    or u3(cout,c2,c1);
    // Write code here


endmodule