Header Files in C++

Header Files in C++

Hello friends today we discuss about most important topic in C++ programming. Header Files in C++

See in the below example

#include <iostream>
int main()
{
    using namespace std;
    cout << "Hello, world!" << endl;
    return 0;
}

In above program print message on scree hello world! by using cout but we don't define cout here actually already cout has been declared in a header file called "iostream".

Types of Header files

There are two types of header files in C++ Programming language.

System header files

System header files is comes with compiler.

User header files

User header files is written by programmer.