const routes: Routes = [
  {path:"", redirectTo:"/home", pathMatch:"full"},
  {path:"home", component:HomeComponent},
  {path:"add", component:AddComponent},
  {path:"edit/:id", component:EditComponent},
  {path:"show/:id", component:ShowComponent}
];
@NgModule({
  imports: [

    CommonModule,
    RouterModule.forRoot(routes)
  ],
  exports: [RouterModule],
  declarations: []
})
export class AppRoutingModule { }