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 x, y, z;
    half_adder h1 (
        .a(a),
        .b(b),
        .sum(x),
        .carry(y)
    );

    half_adder h2 (
        .a(x),
        .b(cin),
        .sum(sum),
        .carry(z)
    );
    assign cout = y | z;


endmodule