module tb;
  logic [7:0] value, bits; logic [3:0] hex_high, hex_low; logic [8:0] weighted_sum; string trace_file;
  positional_encoding dut(.*);
  initial begin
    if ($value$plusargs("trace=%s", trace_file)) begin $dumpfile(trace_file); $dumpvars(0, tb); end
    value = 8'hAD; #1;
    if (bits !== 8'b10101101 || hex_high !== 4'hA || hex_low !== 4'hD || weighted_sum !== 9'd173) $fatal(1, "encoding mismatch");
    $display("PASS task01 value=173 binary=10101101 hex=AD weighted=173"); $finish;
  end
endmodule