161 lines
3.3 KiB
Markdown
161 lines
3.3 KiB
Markdown
=== Классы и объекты ===
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Person tom = new Person();
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string personName = tom.name;
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int personAge = tom.age;
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Console.WriteLine($"name: {personName} age: {personAge}");
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tom.name = "Tom";
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tom.age = 37;
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tom.Print();
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class Person
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{
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public string name = "Undefined";
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public int age;
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public void Print()
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{
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Console.WriteLine($"Имя: {name} Возраст: {age}");
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}
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}
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=== Конструкторы, инициализаторы и деконструкторы ===
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Person tom = new Person();
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Person bob = new Person("Bob");
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Person sam = new Person("Sam", 25);
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tom.Print();
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bob.Print();
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sam.Print();
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class Person
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{
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public string name;
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public int age;
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public Person()
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{
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name = "Unknown";
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age = 18;
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}
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public Person(string n) { name = n; age = 18; }
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public Person(string n, int a) { name = n; age = a; }
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public void Print()
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{
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Console.WriteLine($"name: {name} age: {age}");
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}
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}
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Person sam = new Person("Sam", 25);
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sam.Print();
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class Person
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{
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public string name;
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public int age;
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public Person()
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{
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name = "Unknown";
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age = 18;
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}
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public Person(string name) { this.name = name; age = 18; }
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public Person(string name, int age)
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{
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this.name = name;
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this.age = age;
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}
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public void Print()
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{
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Console.WriteLine($"name: {name} age: {age}");
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}
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}
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"Цепочка вызова конструкторов"
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Person sam = new Person("Sam", 25);
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sam.Print();
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class Person
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{
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public string name;
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public int age;
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public Person() : this("Unknown") { }
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public Person(string name) : this(name, 18) { }
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public Person(string name, int age)
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{
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this.name = name;
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this.age = age;
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}
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public void Print() => Console.WriteLine($"Name: {name} Age: {age}");
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}
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"Первичные конструкторы"
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var tom = new Person("Tom", 38);
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Console.WriteLine(tom);
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public class Person(string name, int age)
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{
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public Person(string name) : this(name, 18) { }
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public void Print() => Console.WriteLine($"name: {name}, age: {age}");
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}
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"Инициализаторы объектов"
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Person tom = new Person { name = "Tom", company = { title = "Microsoft" } };
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tom.Print();
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class Person
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{
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public string name;
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public Company company;
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public Person()
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{
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name = "Undefinde";
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company = new Company();
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}
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public void Print() => Console.WriteLine($"name: {name} company: {company.title}");
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}
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class Company
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{
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public string title = "Unknown";
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}
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"Деконструкторы"
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Person person = new Person("Tom", 33);
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(string name, int age) = person; //(_, int age) = person если нужен только возраст
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Console.WriteLine(name);
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class Person
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{
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string name;
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int age;
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public Person(string name, int age)
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{
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this.name;
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this.age;
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}
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public void Deconstruct(out string personName, out int personAge)
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{
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personName = name;
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personAge = age;
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}
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}
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"Класс Program и метод Main. Программы верхнего уровня"
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string hello = "Hello";
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Print(hello);
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void Print(string message)
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{
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Console.WriteLine(message);
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}
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Person tom = new();
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tom.SayHello();
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class Person
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{
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public void SayHello() => Console.WriteLine("Hello");
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} |