Utmaning: Objekt
Följande program innehåller två klasser, nämligen Person
och Address
.
Läs koden och fyll i luckorna på lämpligt sätt. I denna uppgift ska du ta reda på hur du får åtkomst till fältet Country
i adressobjektet som finns i fältet address
hos objektet p1
.
index.cs
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051using 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($"{___} is the son of {p2.name} and {p3.name}. He is from {___}."); } }
Om ett fält i ett objekt lagrar ett annat objekt kan vi använda punktnotationen (.
) för att komma djupare in i det objektet. Till exempel objectName.someField.anotherField
.
index.cs
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950using System; class Person { public string name; public int age; // We can use other classes as datatypes for a field in a class public Address address; // We can use the class itself as a datatype for a field as well public Person father; public Person mother; } class Address { public string Country; public string City; } public class ConsoleApp { public static void Main(string[] args) { Person p1 = new Person(); p1.name = "Mihaly"; p1.age = 21; Person p2 = new Person(); p2.name = "Ann"; p2.age = 52; Person p3 = new Person(); p3.name = "Nagy"; p3.age = 51; p1.mother = p2; p1.father = p3; Address address = new Address(); address.Country = "Hungary"; address.City = "Budapest"; p1.address = address; // Note the expression 'p1.address.Country' // p1.address accesses the stored Address object // p1.address.Country accesses the Address object's Country field. Console.WriteLine($"{p1.name} is the son of {p2.name} and {p3.name}. He is from {p1.address.Country}."); } }
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Utmaning: Objekt
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Följande program innehåller två klasser, nämligen Person
och Address
.
Läs koden och fyll i luckorna på lämpligt sätt. I denna uppgift ska du ta reda på hur du får åtkomst till fältet Country
i adressobjektet som finns i fältet address
hos objektet p1
.
index.cs
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051using 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($"{___} is the son of {p2.name} and {p3.name}. He is from {___}."); } }
Om ett fält i ett objekt lagrar ett annat objekt kan vi använda punktnotationen (.
) för att komma djupare in i det objektet. Till exempel objectName.someField.anotherField
.
index.cs
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950using System; class Person { public string name; public int age; // We can use other classes as datatypes for a field in a class public Address address; // We can use the class itself as a datatype for a field as well public Person father; public Person mother; } class Address { public string Country; public string City; } public class ConsoleApp { public static void Main(string[] args) { Person p1 = new Person(); p1.name = "Mihaly"; p1.age = 21; Person p2 = new Person(); p2.name = "Ann"; p2.age = 52; Person p3 = new Person(); p3.name = "Nagy"; p3.age = 51; p1.mother = p2; p1.father = p3; Address address = new Address(); address.Country = "Hungary"; address.City = "Budapest"; p1.address = address; // Note the expression 'p1.address.Country' // p1.address accesses the stored Address object // p1.address.Country accesses the Address object's Country field. Console.WriteLine($"{p1.name} is the son of {p2.name} and {p3.name}. He is from {p1.address.Country}."); } }
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