64. Full Adder

How do you plan to solve it?

// Half Adder primitive
module half_adder (
    input  a, b,
    output sum, carry
);
    assign{carry,sum} = a + b;
    
endmodule

// Full Adder using 2 Half Adders
module full_adder_struct (
    input  a, b, cin,
    output sum, cout
);

    wire sum_tmp, c_tmp, c1_tmp;

    half_adder adder1 (.a(a), .b(b), .sum(sum_tmp), .carry(c_tmp));
    half_adder adder2 (.a(sum_tmp), .b(cin), .sum(sum), .carry(c1_tmp));

    assign cout = c1_tmp | c_tmp;

endmodule