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;
endmodule// Write code here
    


// Full Adder using 2 Half Adders
module full_adder_struct (
    input  a, b, cin,
    output sum, cout
);
    wire S1, C1, C2;
     half_adder HA1(
         .a(a),
         .b(b),
        .sum(S1),
        .carry(C1)
         );
                                                
// Second half adder: S1 and cin
     half_adder HA2 (
          .a(S1),
          .b(cin),
          .sum(sum),
          .carry(C2)
          );
                                                                                            
// OR gate merges carries from both half adders
      assign cout = C1 | C2;
                                                                                                    
    endmodule