Lernen Praxis: Objects | Einführung in die Objektorientierte Programmierung (OOP)

Das folgende Programm enthält zwei Klassen, nämlich Person und Address.

Lies den Code und fülle die Lücken entsprechend aus. In dieser Aufgabe musst du herausfinden, wie du auf das Country-Feld des Adressobjekts im address-Feld des p1-Objekts zugreifen kannst.

index.cs


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using System;

class Person {
    public string name;
    public int age;
    
    // We can use other classes as datatypes for a field in a class
    public Address address;
    
    // We can use the class itself as a datatype for a field as well
    public Person father;
    public Person mother;
}

class Address {
    public string Country;
    public string City;
}

public class ConsoleApp
{
    public static void Main(string[] args)
    {
        Person p1 = new Person();
        p1.name = "Mihaly";
        p1.age = 21;
        
        Person p2 = new Person();
        p2.name = "Ann";
        p2.age = 52;
        
        Person p3 = new Person();
        p3.name = "Nagy";
        p3.age = 51;
        
        p1.mother = p2;
        p1.father = p3;
        
        Address address = new Address();
        address.Country = "Hungary";
        address.City = "Budapest";
        
        // Assigning the address object to the address field in p1
        p1.address = ___;
        
        // Note the expression 'p1.address.Country'
        // p1.address accesses the stored Address object
        // p1.address.Country accesses the Address object's Country field.
        Console.WriteLine($"{___} is the son of {p2.name} and {p3.name}. He is from {___}.");
    }
}

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Abschnitt 3. Kapitel 6

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Fragen Sie alles oder probieren Sie eine der vorgeschlagenen Fragen, um unser Gespräch zu beginnen

Suggested prompts:

Can you explain how dot notation works for nested objects?

What would happen if the address field was null?

Can you show how to access the City field in the same way?

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