Compound data type

Compound data type
You are encouraged to solve this task according to the task description, using any language you may know.

Create a structure Point(x,y)

Ada

Tagged Type

Ada tagged types are extensible through inheritance. The reserved word tagged causes the compiler to create a tag for the type. The tag identifies the position of the type in an inheritance hierarchy.

type Point is tagged record
   X : Integer := 0;
   Y : Integer := 0;
end record;

Record Type

Ada record types are not extensible through inheritance. Without the reserved word tagged the record does not belong to an inheritance hierarchy.

type Point is record
   X : Integer := 0;
   Y : Integer := 0;
end record;

Parameterized Types

An Ada record type can contain a discriminant. The discriminant is used to choose between internal structural representations. Parameterized types were introduced to Ada before tagged types. Inheritance is generally a cleaner solution to multiple representations than is a parameterized type.

type Person (Gender : Gender_Type) is record
   Name   : Name_String;
   Age    : Natural;
   Weight : Float;
   Case Gender is
      when Male =>
         Beard_Length : Float;
      when Female =>
         null;
   end case;
end record;

In this case every person will have the attributes of gender, name, age, and weight. A person with a Male gender will also have a beard length.

BASIC

Interpeter: QuickBasic 4.5, PB 7.1

TYPE Point
  x AS INTEGER
  y AS INTEGER
END TYPE

C

Compiler: GCC, MSVC, BCC, Watcom

Libraries: Standard

 typedef struct Point
 {
   int x;
   int y;
 } Point;

C++

Compiler: GCC, Visual C++, BCC, Watcom

 struct Point
 {
   int x;
   int y;
 };

C#

 struct Point
 {
   public int x, y;
   public Point(int x, int y) {
     this.x = x;
     this.y = y;
   }
 }

D TODO

Compiler: DMD,GDC

Java

class Point
{
  public int x, y;
  public Point() { this(0); }
  public Point(int x0) { this(x0,0); }
  public Point(int x0, int y0) { x = x0; y = y0; }
}

Perl TODO

Interpeter: Perl