PascalABC.NET

PascalABC.NET is a Pascal programming language that implements classic Pascal, most Delphi language features, as well as a number of their own extensions. It is implemented on the .NET Framework platform and contains all the modern language features, such as classes, operator overloading, interfaces, exception handling, generic classes and routines, garbage collection, lambda expressions, parallel programming tools ( OpenMP only as of 2016).

PascalABC.NET is also a simple and powerful integrated development environment with an integrated debugger, IntelliSense system, form designer, code templates and code auto-formatting. The command-line PascalABC.NET compiler is also available on Linux and MacOS (under Mono).

PascalABC.NET is popular in Russian schools and universities. In the Southern Federal University, it is used as the main language for teaching students of Information Technology in the course "Fundamentals of programming", and for teaching children in one of the largest computer schools in Russia.

Key features of PascalABC.NET

Pascal language extensions

* Operators += -= *= /=
* in-block variable definitions
* Variable declaration in for loop header
* Variable declaration with initialization (var n: integer := 10;)
* Variable type deduction (var x := 1;)
* foreach
* Routines with a variable number of parameters
* set of any type (set of integer)
* Methods in records
* Methods defined in class declaration
* Simplified syntax of units
* Keyword new (invoking a constructor)
* Field initializers
* Operator overloading
* Static constructors
* Directives OpenMP
* case for strings
* function type syntax T->T
* tuple type syntax (T1, T2)
* yield and yield sequence
* pattern matching
* array slices
* interpolated strings
* unpacking of parameters of lambda expressions into variables

System units

Most units are focused on education:
* Raster graphics units GraphABC (based on Windows Forms), GraphWPF (based on WPF)
* Vector graphics units ABCObjects (based on Windows Forms), WPFObjects (based on WPF)
* 3D graphics & animation unit Graph3D (based on the Helix Toolkit library)
* Unit FormsABC to create simple windows application without form designer
* Units-executors Robot and Drawman (school computer science)

Samples

1. Swap the first and second halves of an array

begin
var a := ArrGen(10,i->2*i+1);
a.Println;
Assert(a.Length mod 2 = 0);
var n := a.Length div 2;
a := a :+ a n
a.Println;
end.

2. 100!

begin
var p: BigInteger := 1;
for var i:=1 to 100 do
p := p * i;
Println(p);
end.

3. Greater common divisor of two integers

begin
var (a, b) := ReadInteger2;
while b > 0 do
(a, b) := (b, a mod b);
var GCD := Abs(a);
GCD.Print;
end.

4. Display all Fibonacci numbers less than 1000

begin
SeqWhile(1,1,(x,y)->x+y,x->x<1000).Print;
end.

5. Word frequency dictionary for a file

begin
var d := new Dictionary;
foreach var s in ReadLines('words.txt') do
foreach var word in s.ToWords do
d ord:= d.Get(word) + 1;
d.PrintLines;
end.

5а. Word frequency dictionary for a file - Solution in functional style

begin
ReadLines('words.txt').SelectMany(s->s.ToWords).GroupBy(v->v).EachCount.PrintLines;
end.

6. Parallel matrix multiplication using OpenMP directives

procedure Mult(a,b,c: array of real; n: integer);
begin

for var i:=0 to n-1 do
for var j:=0 to n-1 do
begin
var cc := 0.0;
for var l:=0 to n-1 do
cc += a ,lb ,j
c ,j:= cc;
end;
end;

const n = 1000;

begin
var a := MatrixRandomReal(n,n,1,1.1);
var b := MatrixRandomReal(n,n,1,1.1);
var c := new real ,n
Mult(a,b,c,n);
Println(MillisecondsDelta/1000);
end.

See also

* Object Pascal
* C#

References

External links

*

PascalABC.NET Github Repository

Official Telegram Channel ''PascalABC.NET''

{{GUI builders

Object-oriented programming languages
Class-based programming languages
.NET programming languages
Pascal (programming language) compilers
Pascal programming language family
Statically typed programming languages