Hello_World.txt

Written by: Artemis Solomon
Welcome to C++: Hello World

CONGRATULATIONS!!! You have written your very first program!
I am going to explain what is exactly going on in the 4 examples I have in "Hello World.cpp".

Example 1:
This is the more common way you will see this written.
The Header File Library, acts as a predefined function library.
  
//Header File Library
#include <iostream>
  
<iostream> is the library that has all the predefined functions for input and output.
This allows the user to have the program ask for information and print it out to the console.

//Function
int main()
{
	std::cout << "Hello World!";
	return 0;
}

int stands for integer. [return an integer of 0]
main stands for main function.
Once the main function has been executed, the program will return a integer.
std stands for Standard Library.
The double colon[::] is a Operator.
cout [see-out] is an Object.
<< is a Insertion Operator.
return tells the program what integer to "return" after the program has successfully executed.

Example 2:
//select our header file library
#include <iostream>

//using namespace, allows us not to have to place std:: before our operators.
//this is poor programming but people do do it.
using namespace std;

int main()
{
	cout << "Hello World!" << endl;
	return 0;
}
//endl is a manipulator, when the program encounters it, it flushes the output buffer and creates a new line.
//This code is the "lazy way".

Example 3:
//select our header file library
#include <iostream> //input/output library
#include <iomanip> //manipulates output "formatting"

int main()
{
	std::cout << setw(10) << "Hello" "World!";
	return 0;	
}
//setw() helps in changing the width of the next input or output field.
// I split up Hello World to show you that the computer will still output Hello World!.

Example 4:
//File header library
#include <iostream>

int main()
{
	std::cout << "Hello World!" << std::endl;
	return 0;
}
//There are several ways to achieve the same outcome.