public static void Main(string[] args)
{
// Person1
Person1 p1 = new Person1("Jack", 28);
p1.name = "Jill";
Console.WriteLine(p1.age);
// Person2
Person2 p2 = new Person2("Jack", 28);
p2.SetName("Jill");
Console.WriteLine(p2.GetAge());
// Person3
Person3 p3 = new Person3("Jack", 28);
p3.Name = "Jill";
Console.WriteLine(p3.Age);
Person5 p5 = new Person5("Jack", 30);
p5.Age = 100;
Console.WriteLine(p5.Age);
Console.ReadLine();
}
public static void Main(string[] args)
{
// Person1
Person1 p1 = new Person1("Jack", 28);
p1.name = "Jill";
Console.WriteLine(p1.age);
// Person2
Person2 p2 = new Person2("Jack", 28);
p2.SetName("Jill");
Console.WriteLine(p2.GetAge());
// Person3
Person3 p3 = new Person3("Jack", 28);
p3.Name = "Jill";
Console.WriteLine(p3.Age);
Person4 p4 = new Person4("Jack", 28);
//p4.Name = "Jill";
Console.WriteLine(p4.Age);
// Person5
Person5 p5 = new Person5("Jack", 30);
p5.Age = -5;
Console.WriteLine(p5.Age);
}
public static void Main(string[] args)
{
// Create an object
Person1 p1 = new Person1("Jack", 21);
// Create a struct
Person2 p2 = new Person2("Jack", 21);
// There's always a zero-argument constructor for structs
Person2 x = new Person2();
// Make both persons one year older
Older1(p1);
Older2(p2);
// Note the difference in the two ages
Console.WriteLine("Both persons one year older");
Console.WriteLine("p1.Age = " + p1.Age);
Console.WriteLine("p2.Age = " + p2.Age);
Console.ReadLine();
// Pass 2 by reference and it works out
Older3(ref p2);
Console.WriteLine("Successfully aging p2");
Console.WriteLine("p2.Age = " + p2.Age);
Console.ReadLine();
// Create two new persons
Person1 p3 = new Person1(p1.Name, p1.Age);
Person2 p4 = new Person2(p2.Name, p2.Age);
// Structs don't have == operators
Console.WriteLine("Using the == operator");
Console.WriteLine("p1 == p3 ? " + (p1 == p3));
//Console.WriteLine("p2 == p4 ? " + (p2 == p4));
Console.ReadLine();
// Equals defaults differently for classes and structs
Console.WriteLine("Default equality of physically different objects/structs");
Console.WriteLine("p1.Equals(p3)) ? " + p1.Equals(p3));
Console.WriteLine("p2.Equals(p4)) ? " + p2.Equals(p4));
Console.ReadLine();
// ReferenceEquals is always false for structs
Console.WriteLine("ReferenceEquals is different for objects/structs");
Console.WriteLine("ReferenceEquals(p1,p3)) ? " + ReferenceEquals(p1, p3));
Console.WriteLine("ReferenceEquals(p1,p1)) ? " + ReferenceEquals(p1, p1));
Console.WriteLine("ReferenceEquals(p2,p4)) ? " + ReferenceEquals(p2, p4));
Console.WriteLine("ReferenceEquals(p2,p2)) ? " + ReferenceEquals(p2, p2));
}
public static void Main(string[] args)
{
// Create an object
Person1 p1 = new Person1("Jack", 21);
// Create a struct
Person2 p2 = new Person2("Jack", 21);
// There's always a zero-argument constructor for structs
Person2 x = new Person2();
// Make both persons one year older
Older1(p1);
Older2(p2);
// Note the difference in the two ages
Console.WriteLine("Both persons one year older");
Console.WriteLine("p1.Age = " + p1.Age);
Console.WriteLine("p2.Age = " + p2.Age);
Console.ReadLine();
// Pass 2 by reference and it works out
Older3(ref p2);
Console.WriteLine("Successfully aging p2");
Console.WriteLine("p2.Age = " + p2.Age);
Console.ReadLine();
// Create two new persons
Person1 p3 = new Person1(p1.Name, p1.Age);
Person2 p4 = new Person2(p2.Name, p2.Age);
// Structs don't have == operators
Console.WriteLine("Using the == operator");
Console.WriteLine("p1 == p3 ? " + (p1 == p3));
//Console.WriteLine("p2 == p4 ? " + (p2 == p4));
Console.ReadLine();
// Equals defaults differently for classes and structs
Console.WriteLine("Default equality of physically different objects/structs");
Console.WriteLine("p1.Equals(p3)) ? " + p1.Equals(p3));
Console.WriteLine("p2.Equals(p4)) ? " + p2.Equals(p4));
Console.ReadLine();
// ReferenceEquals is always false for structs
Console.WriteLine("ReferenceEquals is different for objects/structs");
Console.WriteLine("ReferenceEquals(p1,p3)) ? " + ReferenceEquals(p1, p3));
Console.WriteLine("ReferenceEquals(p1,p1)) ? " + ReferenceEquals(p1, p1));
Console.WriteLine("ReferenceEquals(p2,p4)) ? " + ReferenceEquals(p2, p4));
Console.WriteLine("ReferenceEquals(p2,p2)) ? " + ReferenceEquals(p2, p2));
}
/// <summary>
/// Increments the age
/// </summary>
public static void Older3(ref Person2 p)
{
p.Age++;
}
/// <summary>
/// Increments the page
/// </summary>
public static void Older2(Person2 p)
{
p.Age++;
}
/// <summary>
/// Increments the age
/// </summary>
public static void Older3(ref Person2 p)
{
p.Age++;
}
/// <summary>
/// Increments the page
/// </summary>
public static void Older2(Person2 p)
{
p.Age++;
}