[Downgrade] downgrade example file to 4.0 ver.

lavsim/main.cc

@@ -18,18 +18,15 @@ int main(int argc, char** argv) {
     // real project, it is better to start with a more complete example,
     // e.g. examples/c_tracing.
 
-    // Construct a VerilatedContext to hold simulation time, etc.
-    VerilatedContext* contextp = new VerilatedContext;
-
     // Pass arguments so Verilated code can see them, e.g. $value$plusargs
     // This needs to be called before you create any model
-    contextp->commandArgs(argc, argv);
+    Verilated::commandArgs(argc, argv);
 
     // Construct the Verilated model, from Vtop.h generated from Verilating "top.v"
-    Vtop* top = new Vtop{contextp};
+    Vtop* top = new Vtop();
 
     // Simulate until $finish
-    while (!contextp->gotFinish()) {
+    while (!Verilated::gotFinish()) {
 
         // Evaluate model
         top->eval();