Swift Inheritance, override, final

//Inheritance, override, final 

//Inheritance, override, final 

class Vehicle{
    var totalVehicles : Int = 0
    var desc:String {
        return "totalVehicles : \(totalVehicles)."
    }
}

class Bycle: Vehicle {
    override init(){
        super.init()
        self.totalVehicles = 2
    }
    override var desc : String {
        return super.desc + ", in bycle"
    }
    final func noOverrideMethod(){
        print("final keyword mean this cannot be allowed to override any more")
    }
}
class Bycle4Wheels : Bycle {
    override init(){
        super.init()
        self.totalVehicles = 4
    }

    override var desc : String {
        return super.desc + " with 4 wheels "
    }
}
var b = Bycle()
print( b.desc)
b.noOverrideMethod()
var f = Bycle4Wheels()
print( f.desc)