`ifndef TRANSACTION_SV `define TRANSACTION_SV class transaction; bit [1 : 0] addr; bit [7 : 0] data_i; function void display_transaction(); $display("\taddr = %0h", this.addr); $display("\tdata_i = %0h", this.data_i); endfunction : display_transaction endclass : transaction class newTransaction extends transaction; bit [7 : 0] data_o; bit rw; bit en; function void display_transaction(); super.display_transaction(); $display("\tdata_o = %0h", this.data_o); $display("\trw = %0h", this.rw); $display("\ten = %0h", this.en); endfunction : display_transaction endclass : newTransaction `endif