66. Demultiplexer

How do you plan to solve it?

/*Write your code here*/module demux1to4(
    input  wire       d,
    input  wire [1:0] s,
    output reg  [3:0] y
);

    always @(*) begin
        y = 4'b0000;      // default all outputs zero

        case (s)
            2'b00: y[0] = d;
            2'b01: y[1] = d;
            2'b10: y[2] = d;
            2'b11: y[3] = d;
            default: y = 4'b0000;
        endcase
    end

endmodule