📌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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📌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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🔖 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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👇👇 with Compiler🧲

📌 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 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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📌 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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Structure of C++

📌Syntax
Ways symbols may be combined to
create well-formed sentences.

📌Semantics
meaning of syntactically valid statement.

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Sample code

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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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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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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Data types

A data type specifies the type of data that a variable can store such as integer, floating, character etc

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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C++ IDE

C++ IDE👆