[TUTORIAL] C++ - The Basics

/**
 * Hello World Script by RageD :)
 *
 * This is a comment by the way
 * it can also be done by putting "//" in front of a single line without
 * a line break. No quotes of course.
 *
 */

// Here is the second way to comment :) But it ends when hitting return
#include <iostream> // Using the IOStream include. Later we'll be using the cstdio as it's preferrable imo

using namespace std; // Declare the namespace. This way we can access the "std" library for C++ giving us certain functionality

int main() // Definition of main function - This is where all C++ programs begin
{
	cout<< "Hello World" << endl << endl << "This is a C++ Program!" << endl;
	return 0; // Because this is an "int" (for integer) return a number value to the function. 0 exits.
}

/**
 * Simple User Input by RageD
 * (C) RageD 2008.
 *
 * In this tutorial it is assumed you recall previously
 * covered material and all tutorials fromt here on forth
 * in this segment.
 *
 */

#include <iostream>
#include <string> // Allow us to declare things as "strings"

using namespace std;

int main()
{
	string name; // Declare variable as a "string" that comes from the #include <string> header file
		     // In all honest, you'll probably never use the "string" variable as it's eh. Not
		     // Very good programming really. But we'll go over that later this is just to start
		     // Grasping the concept of programming. Secure/efficient programming comes after this :P
	cout<< "To exit, please type 'exit' for your name.\n\nPlease enter your name: ";
	cin>> name; // This is the user input. The >> means to set the "name" variable to it
	if(name != "exit") // If is a conditional statement. It is explained below in the tutorial
	{
		cout<< "Nice, your name is " << name << endl << endl << "I like it..." << endl << endl;
		// Adding the name variable to be output is very similar to the endl as you can see :)
		return main();
	} else {
		return 0; // Loop to the main function over and over until "exit" is typed.
	}
}

/** 
 * Classes example script by RageD
 * (C) 2008 RageD.
 *
 */

#include "class.cpp" // This is our own header file!
#include <iostream>

using namespace std;

int main()
{
	Main * Main; // Define Main to go to the Main class
	Main->loop(); // This is a pointer. Make this go right to
		     // the loop(); function within the Main class
}

/**
 * Example class script by RageD
 * (C) 2008 RageD.
 *
 */

#include <iostream>

using namespace std;

/**
 * Create the class structure here
 *
 * Not too difficult and pretty self explanatory but take a look anyway :) 
 *
 */

class Main
{
public:
  int loop();
  int a();
  int b();
  int c();
private:
  bool w00t(); // Not coded in example :P
}; // Yes, semi-colon is supposed to be here in this one. Even with the "}"

/**
 * Now let's make the structure useful :P
 *
 */

int Main::loop()
{
	char opt; // Define opt as "char"
	cout<< "Welome to the main menu!\n\nPlease select one of the following options:"<< endl << endl << "a\nb\nc\n\nx to exit" << endl << endl << "Your option: ";
	cin>> opt;
	switch(opt)
	{
		case 'a':
			return Main::a();
		break;
		case 'b':
			return Main::b();
		break;
		case 'c':
			return Main::c();
		break;
		case 'x':
			cout<< "Exiting...\n\n";
			return 0;
		break;
		default:
			cout<< "Your option '"<< opt <<"' is not a valid option!" << endl;
			return Main::loop();
		break;
	}
}

int Main::a()
{
	cout<< "Great, you selected option A!\n\nPlease hit return to continue..." << endl << endl;
	Main::loop();
}

int Main::b()
{
	cout<< "Sweet, you picked option B!\n\nPlease hit return to continue..." << endl << endl;
	Main::loop();
}

int Main::c()
{
	cout<< "Erm.. Why C? C++ FTW! :D\n\nPlease hit return to continue..." << endl << endl;
	Main::loop();
}

g++ main.cpp -o Program_Name

g++ main.cpp -o Program_Name > err.txt

apt-get install mingw32

alias ming++="/usr/bin/i586-mingw32msvc-g++"

ming++ main.cpp -o Program_Name.exe

struct foo{
   int blah; 
   foo(){
      blah = 42;
   }
};  

// create pointer to allocated memory
foo * ptrToFoo = new foo();

// prints 42
cout << ptrToFoo->blah;

// free up memory
delete ptrToFoo;