Standard Way to Write C++ Program :

• Cout is Used to Print Message on the Screen.
• Insertion Operator is Used to put data on screen (<<)
• Return type of main function is integer as it returns 0 to operating system upon successful execution of program.

#include <iostream>
using namespace std; 
int main()
{
  cout << "www.c4learn.com"; 
  return 0;
}

.h Style Program : Old Style

#include<iostream.h>
int main()
{
  cout << "www.c4learn.com"; 
  return 0;
}

Output :

www.c4learn.com