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 sum1,carry1,carry2;
half_adder add1(.a(a),.b(b),.sum(sum1),.carry(carry1));
half_adder add2(.a(sum1),.b(cin),.sum(sum),.carry(carry2));
assign cout = carry2|carry1;

endmodule