Utfordring: Innkapsling
Grunnkoden har to klasser kalt Vehicle og Car. Noen av feltene må skjules, mens andre må eksponeres.
- Juster synligheten til feltene
typeogmodelYeariVehicleslik at de ikke er tilgjengelige utenfor klassen, inkludert i avledede klasser; - Opprett en ny metode kalt
getModelYeariVehicle-klassen som returnerermodelYear. Denne metoden skal være tilgjengelig fra hvor som helst. Metoden gjør det mulig for brukere av klassen å hente verdien avmodelYear, men ikke endre den utenfra; - Egenskapene
ownerNameogfuelskal ikke være tilgjengelige fra noen steder; - Lag en metode kalt
getFuelsom returnerer verdien avfuel; - Lag en metode kalt
addFuelsom tar inn etfloat-argument kaltfuel. Inne i metoden skal verdien avfuellegges til egenskapenfuel(this.fuel).
index.cs
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364using System; class Vehicle { // Edit code below this line public string type; public int modelYear; // Edit code above this line // Create a method below this line // Create a method above this line public Vehicle(string type, int modelYear) { this.type = type; this.modelYear = modelYear; } } class Car : Vehicle { // Edit code below this line public string brandName; public string numberPlate; public string ownerName; public float fuel; // Edit code above this line // Create a method below this line // Create a method above this line public Car(int modelYear, string brandName, string numberPlate, string ownerName, float fuel) : base("Car", modelYear) { this.brandName = brandName; this.numberPlate = numberPlate; this.ownerName = ownerName; this.fuel = fuel; } } class Program { static void Main() { // Create an instance of Car Car myCar = new Car(2022, "Toyota", "ABC123", "John Doe", 50.0f); // Accessing properties and methods from Car class Console.WriteLine($"Brand: {myCar.brandName}"); Console.WriteLine($"Number Plate: {myCar.numberPlate}"); // Accessing getModelYear method from Vehicle class Console.WriteLine($"Model Year: {myCar.getModelYear()}"); // Accessing getFuel method from Car class Console.WriteLine($"Fuel: {myCar.getFuel()}"); // Adding fuel using addFuel method myCar.addFuel(10.0f); Console.WriteLine($"After adding fuel, new Fuel: {myCar.getFuel()}"); } }
- Metodene
getModelYearoggetFueler getter-metoder. De tar ingen argumenter, erpublic, og returnerer kun en verdi. - Metoden
addFueler en setter-metode. Den erpublicog tar ettfloat-argument kaltfuel. For å oppdatere verdien til fuel må du kanskje brukethis-nøkkelordet. (this.fuel += fuel)
index.cs
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576using System; class Vehicle { // Edit code below this line private string type; private int modelYear; // Edit code above this line // Create a method below this line public int getModelYear() { return modelYear; } // Create a method above this line public Vehicle(string type, int modelYear) { this.type = type; this.modelYear = modelYear; } } class Car : Vehicle { // Edit code below this line public string brandName; public string numberPlate; private string ownerName; private float fuel; // Edit code above this line // Create a method below this line public float getFuel() { return fuel; } public void addFuel(float fuel) { this.fuel += fuel; } // Create a method above this line public Car(int modelYear, string brandName, string numberPlate, string ownerName, float fuel) : base("Car", modelYear) { this.brandName = brandName; this.numberPlate = numberPlate; this.ownerName = ownerName; this.fuel = fuel; } } class Program { static void Main() { // Create an instance of Car Car myCar = new Car(2022, "Toyota", "ABC123", "John Doe", 50.0f); // Accessing properties and methods from Car class Console.WriteLine($"Brand: {myCar.brandName}"); Console.WriteLine($"Number Plate: {myCar.numberPlate}"); // Accessing getModelYear method from Vehicle class Console.WriteLine($"Model Year: {myCar.getModelYear()}"); // Accessing getFuel method from Car class Console.WriteLine($"Fuel: {myCar.getFuel()}"); // Adding fuel using addFuel method myCar.addFuel(10.0f); Console.WriteLine($"After adding fuel, new Fuel: {myCar.getFuel()}"); } }
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Seksjon 5. Kapittel 7
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Utfordring: Innkapsling
Sveip for å vise menyen
Grunnkoden har to klasser kalt Vehicle og Car. Noen av feltene må skjules, mens andre må eksponeres.
- Juster synligheten til feltene
typeogmodelYeariVehicleslik at de ikke er tilgjengelige utenfor klassen, inkludert i avledede klasser; - Opprett en ny metode kalt
getModelYeariVehicle-klassen som returnerermodelYear. Denne metoden skal være tilgjengelig fra hvor som helst. Metoden gjør det mulig for brukere av klassen å hente verdien avmodelYear, men ikke endre den utenfra; - Egenskapene
ownerNameogfuelskal ikke være tilgjengelige fra noen steder; - Lag en metode kalt
getFuelsom returnerer verdien avfuel; - Lag en metode kalt
addFuelsom tar inn etfloat-argument kaltfuel. Inne i metoden skal verdien avfuellegges til egenskapenfuel(this.fuel).
index.cs
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364using System; class Vehicle { // Edit code below this line public string type; public int modelYear; // Edit code above this line // Create a method below this line // Create a method above this line public Vehicle(string type, int modelYear) { this.type = type; this.modelYear = modelYear; } } class Car : Vehicle { // Edit code below this line public string brandName; public string numberPlate; public string ownerName; public float fuel; // Edit code above this line // Create a method below this line // Create a method above this line public Car(int modelYear, string brandName, string numberPlate, string ownerName, float fuel) : base("Car", modelYear) { this.brandName = brandName; this.numberPlate = numberPlate; this.ownerName = ownerName; this.fuel = fuel; } } class Program { static void Main() { // Create an instance of Car Car myCar = new Car(2022, "Toyota", "ABC123", "John Doe", 50.0f); // Accessing properties and methods from Car class Console.WriteLine($"Brand: {myCar.brandName}"); Console.WriteLine($"Number Plate: {myCar.numberPlate}"); // Accessing getModelYear method from Vehicle class Console.WriteLine($"Model Year: {myCar.getModelYear()}"); // Accessing getFuel method from Car class Console.WriteLine($"Fuel: {myCar.getFuel()}"); // Adding fuel using addFuel method myCar.addFuel(10.0f); Console.WriteLine($"After adding fuel, new Fuel: {myCar.getFuel()}"); } }
- Metodene
getModelYearoggetFueler getter-metoder. De tar ingen argumenter, erpublic, og returnerer kun en verdi. - Metoden
addFueler en setter-metode. Den erpublicog tar ettfloat-argument kaltfuel. For å oppdatere verdien til fuel må du kanskje brukethis-nøkkelordet. (this.fuel += fuel)
index.cs
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576using System; class Vehicle { // Edit code below this line private string type; private int modelYear; // Edit code above this line // Create a method below this line public int getModelYear() { return modelYear; } // Create a method above this line public Vehicle(string type, int modelYear) { this.type = type; this.modelYear = modelYear; } } class Car : Vehicle { // Edit code below this line public string brandName; public string numberPlate; private string ownerName; private float fuel; // Edit code above this line // Create a method below this line public float getFuel() { return fuel; } public void addFuel(float fuel) { this.fuel += fuel; } // Create a method above this line public Car(int modelYear, string brandName, string numberPlate, string ownerName, float fuel) : base("Car", modelYear) { this.brandName = brandName; this.numberPlate = numberPlate; this.ownerName = ownerName; this.fuel = fuel; } } class Program { static void Main() { // Create an instance of Car Car myCar = new Car(2022, "Toyota", "ABC123", "John Doe", 50.0f); // Accessing properties and methods from Car class Console.WriteLine($"Brand: {myCar.brandName}"); Console.WriteLine($"Number Plate: {myCar.numberPlate}"); // Accessing getModelYear method from Vehicle class Console.WriteLine($"Model Year: {myCar.getModelYear()}"); // Accessing getFuel method from Car class Console.WriteLine($"Fuel: {myCar.getFuel()}"); // Adding fuel using addFuel method myCar.addFuel(10.0f); Console.WriteLine($"After adding fuel, new Fuel: {myCar.getFuel()}"); } }
Alt var klart?
Takk for tilbakemeldingene dine!
Seksjon 5. Kapittel 7