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
);
    // Write code here
    half_adder h1(.a(a), .b(b), .sum(sum_1), .carry(carry_1));
    half_adder h2(.a(sum_1), .b(cin), .sum(sum), .carry(carry_2) );
    xor xor1(cout,carry_1,carry_2);

endmodule