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 ha0_s, ha0_c, ha1_c;
    
    half_adder HA_0(a,b,ha0_s,ha0_c);
    half_adder HA_1(ha0_s,cin,sum,ha1_c);
    assign cout = ha0_c|ha1_c;

endmodule