What is C++?
📌 C++ is a cross-platform language that can be used to create high-performance applications.
📌 C++ was developed by Bjarne Stroustrup, as an extension to the C language.
📌 C++ gives programmers a high level of control over system resources and memory.
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📌 C++ is a cross-platform language that can be used to create high-performance applications.
📌 C++ was developed by Bjarne Stroustrup, as an extension to the C language.
📌 C++ gives programmers a high level of control over system resources and memory.
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Why Use C++
📌C++ is one of the world's most popular programming languages.
📌C++ can be found in today's operating systems, Graphical User Interfaces, and embedded systems.
📌C++ is an object-oriented programming language which gives a clear structure to programs and allows code to be reused, lowering development costs.
📌C++ is portable and can be used to develop applications that can be adapted to multiple platforms.
📌C++ is fun and easy to learn!
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📌C++ is one of the world's most popular programming languages.
📌C++ can be found in today's operating systems, Graphical User Interfaces, and embedded systems.
📌C++ is an object-oriented programming language which gives a clear structure to programs and allows code to be reused, lowering development costs.
📌C++ is portable and can be used to develop applications that can be adapted to multiple platforms.
📌C++ is fun and easy to learn!
@c_programming_tut
📌C++ Getting Started...
⚙️ To start using C++, you need two things:
🔧A text editor,
like Notepad,
Sublime Text ,
VS code,
to write C++ code
🔧A compiler,
like GCC,
to translate the C++ code into a language that the computer will understand
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⚙️ To start using C++, you need two things:
🔧A text editor,
like Notepad,
Sublime Text ,
VS code,
to write C++ code
🔧A compiler,
like GCC,
to translate the C++ code into a language that the computer will understand
@c_programming_tut
📌C++ Install IDE
⚙️An IDE (Integrated Development Environment) is used to edit AND compile the code.
⚙️Popular IDE's include
Code::Blocks,
Eclipse, and
Visual Studio.
These are all free, and they can be used to both edit and debug C++ code.
Note: Web-based IDE's can work as well, but functionality is limited.
⚙️We will use Code::Blocks in our tutorial, which we believe is a good place to start.
📥 You can find the latest version of Codeblocks at
http://www.codeblocks.org/downloads/26
Download the mingw-setup.exe file, which will install the text editor with a compiler.
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⚙️An IDE (Integrated Development Environment) is used to edit AND compile the code.
⚙️Popular IDE's include
Code::Blocks,
Eclipse, and
Visual Studio.
These are all free, and they can be used to both edit and debug C++ code.
Note: Web-based IDE's can work as well, but functionality is limited.
⚙️We will use Code::Blocks in our tutorial, which we believe is a good place to start.
📥 You can find the latest version of Codeblocks at
http://www.codeblocks.org/downloads/26
Download the mingw-setup.exe file, which will install the text editor with a compiler.
@c_programming_tut
📌C++ Quickstart
☑️ Let's create our first C++ file.
☑️ Open Codeblocks and go to File > New > Empty File.
☑️ Write the following C++ code and save the file as myfirstprogram.cpp (File > Save File as):
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☑️ Let's create our first C++ file.
☑️ Open Codeblocks and go to File > New > Empty File.
☑️ Write the following C++ code and save the file as myfirstprogram.cpp (File > Save File as):
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🔖 Don't worry if you don't understand the code above -
we will discuss it in detail in later chapters.
☑️For now, focus on how to run the code.
☑️ Then, go to Build > Build and Run to run (execute) the program.
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we will discuss it in detail in later chapters.
☑️For now, focus on how to run the code.
☑️ Then, go to Build > Build and Run to run (execute) the program.
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📌 Example explained
☑️ Line 1: #include <iostream> is a header file library that lets us work with input and output objects, such as cout (used in line 5). Header files add functionality to C++ programs.
☑️ Line 2: using namespace std means that we can use names for objects and variables from the standard library.
🔖Don't worry if you don't understand how #include <iostream> and using namespace std works. Just think of it as something that (almost) always appears in your program.
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☑️ Line 1: #include <iostream> is a header file library that lets us work with input and output objects, such as cout (used in line 5). Header files add functionality to C++ programs.
☑️ Line 2: using namespace std means that we can use names for objects and variables from the standard library.
🔖Don't worry if you don't understand how #include <iostream> and using namespace std works. Just think of it as something that (almost) always appears in your program.
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☑️ Line 3: A blank line. C++ ignores white space.
☑️ Line 4: Another thing that always appear in a C++ program, is int main(). This is called a function. Any code inside its curly brackets {} will be executed.
☑️ Line 5: cout (pronounced "see-out") is an object used together with the insertion operator (<<) to output/print text. In our example it will output "Hello World".
☑️Line 6: return 0 ends the main function.
☑️Line 7: Do not forget to add the closing curly bracket } to actually end the main function.
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☑️ Line 4: Another thing that always appear in a C++ program, is int main(). This is called a function. Any code inside its curly brackets {} will be executed.
☑️ Line 5: cout (pronounced "see-out") is an object used together with the insertion operator (<<) to output/print text. In our example it will output "Hello World".
☑️Line 6: return 0 ends the main function.
☑️Line 7: Do not forget to add the closing curly bracket } to actually end the main function.
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📌 Omitting Namespace
☑️You might see some C++ programs that runs without the standard namespace library.
☑️The using namespace std line can be omitted and replaced with the std keyword, followed by the :: operator for some objects:
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☑️You might see some C++ programs that runs without the standard namespace library.
☑️The using namespace std line can be omitted and replaced with the std keyword, followed by the :: operator for some objects:
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Structure of C++
📌Syntax
Ways symbols may be combined to
create well-formed sentences.
📌Semantics
meaning of syntactically valid statement.
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📌Syntax
Ways symbols may be combined to
create well-formed sentences.
📌Semantics
meaning of syntactically valid statement.
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Basic elements of C++
0⃣ Reserved words
A reserved word is a word that cannot be used as an identifier, such as the name of a variable, function, or label
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0⃣ Reserved words
A reserved word is a word that cannot be used as an identifier, such as the name of a variable, function, or label
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1⃣ Identifier
is a name used to identify a variable, function, class, module, or any other user-defined item.
📌Start with a letter or underscore
📌Consist only of alpha-numeric symbols or the underscore symbol _
📌Not be a reserved word
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is a name used to identify a variable, function, class, module, or any other user-defined item.
📌Start with a letter or underscore
📌Consist only of alpha-numeric symbols or the underscore symbol _
📌Not be a reserved word
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2⃣ Comments
a piece of descriptive text which explains some aspect of a program.
Comments can be used to explain C++ code, and to make it more readable. It can also be used to prevent execution when testing alternative code.
✅Single-line comments //
✅Multi-line comments /* */
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a piece of descriptive text which explains some aspect of a program.
Comments can be used to explain C++ code, and to make it more readable. It can also be used to prevent execution when testing alternative code.
✅Single-line comments //
✅Multi-line comments /* */
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Operators
Operators in C++, An operator is a symbol that tells the compiler to perform specific mathematical or logical manipulations.
📌Operators in C++ can be classified into 7 types
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Operators in C++, An operator is a symbol that tells the compiler to perform specific mathematical or logical manipulations.
📌Operators in C++ can be classified into 7 types
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