module dec3to8(W, En, Y);
  input [2:0] W;
  input En;
  output [0:7] Y;
  reg [0:7] Y;

  always @(W or En)
  begin
    if (En == 1)
      case (W)
        3'b000: Y = 8'b00000001;
        3'b001: Y = 8'b00000010;
        3'b010: Y = 8'b00000100;
        3'b011: Y = 8'b00001000;
        3'b100: Y = 8'b00010000;
        3'b101: Y = 8'b00100000;
        3'b110: Y = 8'b01000000;
        3'b111: Y = 8'b10000000;
      endcase
    else
      Y = 8'b00000000;
  end
endmodule