In this presentation on C++ Header files, we will learn what are C++ Header Files and why we need header files? We'll look at the types of header files and how to create our own header files. You will understand through interactive examples and code snippets. Below are the topics we will be discussing in this video: 1. Why We need Header Files? 2.​ C++ Header File 3.​ Types of Header Files 4. How to create your own header file 5.​ Examples header files ✅What is C++ Programming? C++ is an enhanced and extended version of the C programming language, developed by Bjarne Stroustrup in 1979 as part of his Ph.D. project. Bjarne developed what he called ‘C with Classes’ (later renamed C++) because he felt limited by the existing programming languages that were not ideal for large-scale projects. He used C to build what he wanted because C was already a general-purpose language that was efficient and fast in its operations. ✅C++ Career Prospects: With just C++ programming expertise, you will have excellent job opportunities, salaries, and career prospects. However, for a career based on programming languages such as Java and Python (which are in more demand than C++) or for careers based on front-end, back-end, and full-stack development, you will go a lot further with C++ expertise. Furthermore, in development domains such as software testing, you are expected to know C++. To know about C++ programming, visit: https://www.simplilearn.com/c-plus-plus-programming-for-beginners-article?utm_campaign=C++&utm_medium=Description&utm_source=Slideshare

2. Why we need Header files ?
Types of header files
C++ header file
How to create your own header file
Examples header files
What’s in it for you ?

3. Why we need header files ?
Header files allow us to assemble all predefined functions
in a single library
It reduces the complexity and number of lines of code
It helps in taking input and displaying output in the
program and many more functionalities

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5. C++ header file
Syntax : #include<filename.h>
Header files are the set of libraries that contains predefined functions like cin, cout
that are being used while writing a program

6. Types of header files
There are two types of header files :
Pre-existing header files : These are those files which are already available in
C++ compiler
User-defined header files : These are those files which are defined by users
and can be imported using include

7. • First of all, we write the C++ code, which we want to use whenever we
want
• Now save the file with “.h ” extension
int product(int x, int y)
{
return (x*y);
}
Step 1 :
How to create your own header file

8. How to create your own header file
• With the help of pre-processor “#include”, add the header file in the
program
#include<iostream>
#include<product.h>
int main()
{
int x=9;
int y=5;
cout<<product(x,y)<<endl;
}
Step 2 :
Output: 45

9. Examples of header files
Some C++ header files are :
#include<iostream> : Used in order to read or write standard input and output
streams
#include<iomanip.h> : Used in the manipulation of input/output statements
#include<fstream.h> : Used to write information to files and read information from
files