The PascalABC.NET system was developed to teach programming in Pascal to schoolchildren and students.

The Pascal language is the golden mean between the outdated “Borland Pascal”, oriented towards MS DOS, on the one hand, and the “Borland Delphi” development environment, difficult for beginners, on the other. It is precisely for the ease of learning and the wide range of possibilities that the Pascal programming language is considered one of the best for initial learning.

The Pascal ABC system is based on the Delphi Pascal language, but unlike the latter, it was originally created as a learning tool, not a professional development tool, and therefore has significant differences.

The main differences between the Pascal ABC system and Borland Delphi
- The Events module allows you to create simple event programs without using objects (events are ordinary procedural variables).
- Timers and Sounds modules allow you to create timers and sounds, which are also implemented in a procedural style. These modules can even be used in console programs.
- The VCL visual components module allows you to create event-driven applications with a Delphi-style main form. VCL classes are a bit simplified compared to similar Delphi classes. There is a form editor and an object inspector. The technology for restoring a form using program code makes it possible to use just one file for an application with the main form (!).
- The GraphABC raster graphics module does not require objects, although its capabilities are not inferior to the graphics capabilities of Borland Delphi. It is available in non-event programs and allows you to easily create flicker-free animations.
- Module vector graphics ABCObjects is designed for quickly learning the basics of object-oriented programming, and also allows you to create quite complex game and educational programs.
- The module of container classes Containers allows you to work with basic data structures (dynamic arrays, stacks, queues, sets), implemented as classes.

The program includes a mini-version of the electronic problem book for 200 problems and a set of tasks for the “Robot” and “Draftsman” performers.
Currently, the Pascal ABC system is used to teach first-year students at the Faculty of Mechanics and Mathematics of the State University in Rostov-on-Don.
Also integrated into the system is the electronic problem book “Programming Taskbook” (M.E. Abrahamyan), which contains more than 1000 tasks of varying levels of complexity and covers all the main sections of the basic programming course in Pascal.

Familiarization with the operation of the system will be useful for anyone who wants to master the basics of object programming in Windows.

Professional development environment for creating programs and applications of any level of complexity. Combines the classic simplicity of Pascal with all the capabilities of the modern .NET development environment used by professional developers around the world. In addition, the Pascal programming language is taught in a school computer science course, giving students a basic knowledge of operators and variables. Thus, learning Pascal abs is better for beginners than learning other programming languages.

The course of seven practical video lessons is ideal for those who want to learn how to make a program in Pascal ABC, regardless of their skill level. Each lesson has its own topic, so you can watch them either in order or selectively to deepen and expand your knowledge in a particular area.

Pascal ABC Lessons

The Pascal ABS lessons presented in the video course are based on the development application programs and provide practical knowledge. All the programs that you write during the video course are fully working and can be used in everyday life - there is no “water” or empty theory in the course.

We master the editor interface and write our first lines of code.

We study the logic of working with numbers and design a timer.

We study how a programming language compiles source code.

We use Pascal to find a solution to the problem about schoolgirl Anna.

We program a real virtual music synthesizer.

Mastering complex mathematical functions and create a full-fledged engineering calculator.

We create the “correct” phone book based on the database.

Lesson 1 - First program
Lesson 2 - Prime numbers
Lesson 3 - Compilers (Part 1)
Lesson 3 - Compilers (Part 2)
Lesson 4 - Solving a school problem
Lesson 5 - Making a Piano
Lesson 6 - Advanced Calculator (Part 1)
Lesson 6 - Advanced Calculator (Part 2)
Lesson 7 - Convenient phone book (Part 1)
Lesson 7 - Convenient phone book (Part 2)
Lesson 7 - Convenient phone book (Part 3)
Lesson 7 - Convenient phone book (Part 4)
Lesson 8 - Working with graphics. Particle System (Part 1)
Lesson 8 - Working with graphics. Particle System (Part 2)
Lesson 8 - Working with graphics. Particle System (Part 3)
Lesson 8 - Working with graphics. Particle System (Part 4)

PascalABC.NET - training system and programming language Pascal ABC

Pascal ABC (Pascal ABS) is a free and powerful program development environment with a Pascal language training system, detailed reference information, code hints, auto-formatting, a built-in debugger and form designer.

Main features of PascalABC.NET (Pascal ABS)

PascalABC.NET is a powerful and modern programming language that surpasses the Delphi programming language in capabilities and contains almost all the features of the C# language.

The PascalABC.NET language contains all the basic elements of modern programming languages: modules, classes, operator overloading, interfaces, exceptions, generic classes, garbage collection, lambda expressions, as well as some concurrency tools, including OpenMP directives. The Pascal ABC NET system also includes a simple, integrated environment designed to effectively teach modern programming.

Pascal ABC - lessons on the Pascal ABC programming language

The development environment is based on the Microsoft .NET platform - its language capabilities and libraries, making it flexible, efficient and constantly evolving. In addition, you can easily combine libraries developed in Pascal ABC NET and other .NET languages.

The Pascal ABC compiler produces code that runs as fast as C# code, but slightly slower than C++ and Delphi code.

The Pascal programming language was developed by Swiss scientist Niklaus Wirth in 1970 as a strongly typed language with an intuitive syntax. In the 80s, the most famous implementation was the Turbo Pascal compiler from Borland; in the 90s, it was replaced by the Delphi programming environment, which became one of the best environments quick creation applications for .

The Delphi programming environment introduced a number of successful object-oriented extensions to Pascal; the updated language was called Object Pascal. Since version Delphi 7, the Delphi Object Pascal language began to be called simply Delphi. Among the alternative implementations of Object Pascal, the multi-platform open source project should be noted.

Please note that Pascal ABC includes lessons, sample programs, and a problem book to help you learn this great programming language.

A pre-installed package is required for the environment to work

There is probably not a single modern person who does not know the Pascal language (the basics of programming). And this is not surprising! The most basic concepts of this unique program are described in the computer science textbook for schoolchildren.

Now, in this century information technologies, everyone can conduct self-tutorial training online (by taking the courses “Learning programming languages ​​from scratch”; “Pascal for dummies” and others).

The history of the language being studied is not so simple: Pascal underwent many changes before schoolchildren saw it in the form in which it is taught in the classroom. It was the very first simple language (ord pascal) for programming, helping to solve many practical problems of the last century (1970). It was developed by a group of scientists.

As platforms expanded, new versions of this program were created, and Pascal became a classic programming language.

Below we will look at what Pascal is and what its main tools are. Let's consider the operations and functions of the program, its specific features. Let's use examples to understand how it works. Let's learn to write and work in Pascal.

What is the Pascal programming language

This is a basic high-level program. It ranks first in the curricula of many schools and universities in the Russian Federation.

Features of the PascalABC.NET system

Everything is learned by comparison, so let’s consider the advantages of this program in relation to another BASIC language.

So, what is typical for the Pascal language and what is not suitable for BASIC:

1. Firstly, the presence of a compiler that allows you to download Pascal to any platform.
2. Secondly, all versions of this program are compatible with each other.
3. Thirdly, structured data types help the programmer to accurately compose the necessary algorithm for solving a practical problem, while protecting it.
4. Fourthly, the clarity and logic of the program interface: all commands are simple and understandable.
5. Fifthly, switching to another, higher-level programming language is quite simple.

Example programs on PascalABC.NET

Sum of entered integers

Product of integers

How many are odd among the n entered?

Invalid input protection

Conclusion of 10 first powers of two

Find the sum of the digits of a positive integer m

Factoring a number into prime factors

Pascal for Beginners - Basic Concepts

Let's sort it out basic concepts, helping to correctly write a program in a given language.

Workspace

What does the workspace look like?

Now let's look at the basics: the alphabet and structure.

Alphabet Pascal

What do you need to know? An alphabet is a set of symbols needed when composing a program.

What they include:

1. Latin uppercase, lowercase letters (A, B, C....a,b,c).
2. Arithmetic symbols (0, 1, 2...).
3. Special characters (punctuation, parentheses, quotation marks, arithmetic signs, etc.).
4. Indivisible symbols (:=, ˃=…).
5. Function words:

• and – and;
• array – array;
• begin – beginning;
• do – execute;
• else - otherwise;
• for – for;
• if – if;
• of – from;
• or – or;
• procedure – procedure;
• program – program;
• repeat – repeat;
• then – that;
• to – before;
• until – until (= while);
• var – variable;
• while - for now.

Please note: constants and operations should not have the same names as function words (any length).

Program structure

So, what is included in the “hierarchy” of this program?

According to its structure, this language is divided into 3 sections:

• Name;
• data;
• actions.

Note: Variables must be listed separated by commas, and then their type must be indicated through “:”. Complete the written word with “;”.

Actions begin with "begin" and end with "end" with a period.

The structure can be represented as follows:

By the way, operators are separated by semicolons.

Operators write, writeln, read, readln

Let's find out how the output and input of information occurs.

Conclusion

There are no output operators as such in this language, but there are special words that help launch the necessary functions. This write, writeln.

What is their main difference? When entering or outputting subsequent information after them: in the first case, subsequent information will be output on the same line where the statement is written. But in the second - to the next one.

Enter

There are also words for input: read, readln(=readkey).

They differ from each other in the same way as the previous statements (in output).

Integer data type

There are 3 main types:

1. Integer.
2. Byte.
3. Longint.

They also carry out simple actions:

• addition – “+”;
• subtraction – “-”;
• multiplication - "*";
• division – “div”.

In addition, it is allowed to make relationships and comparisons (greater than or equal to - ˃ =).

Real data types

Such variables include fractional numbers (for example, pi). Here they are called real.

What to remember? To enter a fractional formula, you must use a period instead of a comma. To write powers (x * 10 y), 10 is replaced by E and the number has the notation:

With them you can perform both the simplest arithmetic operations and more complex ones:

• square root – sqrt;
• absolute value – abs;
• quadratic function – sqr;
• sine – sin;
• cosine – cos;
• arctangent – ​​arctan;
• natural logarithm – ln;
• exponent – ​​exp.

Data processing

In addition to the functions listed above (in the previous 2 paragraphs), there are others:

• integer part of the number – int;
• fractional part of the number – frac;
• getting the integer part of a number – trunc;
• rounding to the nearest whole number – round;
• ordinal type conversion – ord;
• converting code to character type – chr;
• determination of the previous value of a quantity – pred;
• determination of the subsequent value of a quantity – succ.

Mathematical operations

Mathematical functions and operations were covered when parsing integer and real data.

Let's focus on the types of constants and variables. What are they?

Simple ones include subtypes:

• integers – integer;
• logical – boolean;
• character – char;
• enumerable;
• interval;
• real

Strings are written with the string command. References are presented in the appropriate form.

Structured ones are divided into:

• arrays – array;
• records – record;
• sets – set;
• file – file.

Each type has its own set of operations.

Conditions

If there are alternative commands and functions, then using the if, then, else statements you can write down the necessary commands to solve a practical problem.

The diagram is shown in the figure below.

Logical operations

Operations are based on the truth of a fact or its lie.

There are 3 types of such functions:

1. Odd - if the number is odd, then true (vice versa - false).
2. Eoln – true at the end of the line (elsewhere – false).
3. Eof – true at the end of the file (elsewhere – false).

Program control functions

What other procedures exist:

• Inc – increase in number;
• Clrscr – clearing previous results of the program;
• Uses crt – launch clscr;
• Length – return the length of the string;
• Val – convert a string to a number;
• Pos – find the first transformation in the string;
• Assign – linking a variable to a file;
• Upcase - converting lowercase letters to uppercase ones.

Conclusion

So, to become a good programmer, you first need to learn the basics. Pascal is the best choice for this.

“Pascal ABC” is a training system that allows schoolchildren and students to become familiar with the programming language of the same name. It was developed in 2002 by Russian scientists. The developers' task was to create a programming environment that would meet modern standards and could easily teach students.

The interpreter is designed for 32-bit systems and contains ways to implement some features. Despite the fact that the original ones were considered unnecessary for training.

The compiler allows you to use simplified types of language constructs, which facilitates the transition from basic programs to modular and object-oriented ones.

The Pascal ABC program has become free software since version 3.0.

Peculiarities

The program has hints that are provided when writing code, auto-formatting, a debugger and a form designer. designed for tasks of easy and medium complexity and for language learning.

The compiler is capable of executing code as fast as C#, and a little slower than C++, Delphi.

Thanks to the .NET platform, software supports all the features of Microsoft.NET and its libraries. You can safely use the latter in your programs, even relying on those created in another programming language.

“Pascal ABC” also has an online version, which has become widespread. It works without failures, the I/O process occurs over the network; programs are saved on the server.

Among many programmers there is an opinion that Pascal is a dead language, and the cessation of its use is a matter of time. This statement is based on the fact that schools use an old programming environment with reduced capabilities. This prevents students from appreciating all the functions of language.

Training modules

Thanks to Microsoft.NET, Pascal ABC received a standard library that has many classes that allow you to solve problems of varying complexity. That is why there is simply no need to develop your own modules, but there is certainly an opportunity to do this. As a rule, those that already exist thanks to programmers are aimed at better language acquisition.

In order to teach schoolchildren, the “Robot” and “Draftsman” modules are used. They have more than 200 examples that are subject to auto-checking. By solving these problems, a person will easily master the basic structures of the Pascal language.

The list of modules does not end there. There is a built-in electronic problem book, which is useful for those who study on their own or want to repeat the material and consolidate knowledge.

In order to create graphic elements in the Pascal ABC program, vector and raster graphics modules are used.

Differences

The programming environment has a form designer, thanks to which you can create a windowed application. Unlike other compilers, this one does not have a very voluminous and sophisticated interface, and does not create many additional files. By interacting with one small program, Pascal ABC forms only one element on the disk.

The programming environment has a special shell that works for console tasks. Input and output of information is carried out exactly in it, designed in the form of a window. Among the “native” languages ​​used by the program are Russian and English, which makes it easy to use.

Tasks

Tasks are written using the Pascal programming language. It is easy to learn, so your first program may very well be very easy to use. All over the world the following lines are considered as opening lines:

• Begin.
• Writeln(‘Hello World!’).

The first and last lines are operator brackets, which should contain the essence of the task. The second one declares the output of text enclosed in quotes. Here are some easy examples. “Pascal ABC” has many similar programs in its problem book, which are easy and interesting to learn.