C++ is a high-level, object-oriented programming language that has been around for over three decades. It was designed by Bjarne Stroustrup in the early 1980s as an extension of the C language. C++ has become one of the most widely used programming languages in the world, especially in the field of software development, and is an excellent language for beginners to learn. In this guide, we will provide a brief biography of the C++ language, explain how to write it with an example, and explore its best applications.

Biography of C++ Language:

C++ was first released in 1985 by Bjarne Stroustrup, who was a PhD student at the time. Stroustrup created the language as an extension of the C language to address some of its limitations, such as lack of support for object-oriented programming. The name "C++" comes from the increment operator used in C, which represents an increase in the value of a variable.

Over the years, C++ has evolved and become more powerful, and many new features have been added to the language. Some notable features of C++ include its ability to support both procedural and object-oriented programming paradigms, strong type checking, and efficient memory management.

How to Write C++ with an Example:

To write a basic C++ program, you will need to have a compiler installed on your computer. A compiler is a program that translates the code you write into machine language that the computer can understand.

Here is an example of a basic C++ program:

```
#include <iostream>
using namespace std;

int main() {
   cout << "Hello, world!";
   return 0;
}
```

In this program, we are including the standard input/output library, which provides input and output operations in C++. We are also using the namespace std, which allows us to use the standard library functions without prefixing them with "std::".

The main function is where the program starts executing. In this function, we are using the cout object to display the message "Hello, world!" on the console. Finally, we are returning the value 0, which indicates that the program has completed successfully.

Best Applications for C++:

C++ is widely used in many fields, including software development, gaming, and operating systems. Its ability to provide low-level memory access and efficient memory management makes it ideal for developing applications that require high performance.

Some of the best applications for C++ include:

1. Gaming: C++ is used extensively in game development due to its speed and efficiency. Many popular games, such as World of Warcraft and Counter-Strike, are built using C++.

2. Operating Systems: C++ is used to build many operating systems, including Microsoft Windows, Linux, and macOS.

3. Database Management: C++ is used to build many popular database management systems, such as MySQL and Oracle.

4. System Programming: C++ is used to build system-level applications, such as device drivers and operating system components.

Conclusion:

C++ is a powerful programming language that has been around for over three decades. It is widely used in many fields, including software development, gaming, and operating systems. In this guide, we have provided a brief biography of the C++ language, explained how to write it with an example, and explored its best applications. Whether you are a beginner or an experienced programmer, C++ is a language that is worth learning due to its efficiency, power, and versatility.