[Guide] C++ Scripting/Programming Tutorial #1

[CoolManBob]

#include <iostream>

using namespace std;

int main()
{
cout << "Hello World!\n";
return 0;
}

This is your basic Hello World Program.
This is usually the very first program people start out with when they begin doing

programming.

Im going to explain what each line does

#include <iostream>

# is a preproccessor operator, you may have used it with #define, a preprocessor operator

tells the compiler to do something before it starts compiling, in this case it tells the

compiler to find iostream.h and include it in this .cpp file.

the <> tells the compiler that the file is a library file and to find the header or .h file

in it's library folder

When a compiler includes something, it means that the .cpp file can use functions that the

.h file declares.

using namespace std;

In programming there are things called Classes and namespaces, classes and namespaces are

similar to each other in that they both are a group of functions, but they are different.

Namespaces are a group of function identifiers, in this case std, this line tells the

compiler that the .cpp file is using the std namespace so every time a function has a std

identifier there is no need to use it, in this case cout is actually std::cout, but becuase

we are using the std namespace there is no need to "identify" cout with std.

int main()

This is the main function that is called when the program runs, this is absolutly important

you have this, the program WILL NOT work if you don't have this function.

the int before the main() is what must be returned when the function ends, in this case an

int which means an integer, there are other things im sure you have seen, void, uint32, and

others.

void basically means that the functions will return no value, uint32 means the function will

return a value of an uint32, exactly what a uint32 and other datatypes will be explained in

another tutorial.

{

This is an opening brace, it "opens" the function so code can be written in it and be

executed.

cout << "Hello World\n";

cout is a function that enables us to write to screen, there are other functions that can do

the same thing, but for the sake of this tutorial and simplicity I chose to use cout.

the << is an output operator, everything afer is is written to the cout function, so the

cout function can output the text to screen.

the quotations signify a string, what exactly a string is will be expalined in another

tutorial.

the \n is simply called an escape character, this certain one writes a new line, so if i

were to add more text it would be written on the line after Hello World!

return 0;

this piece of code tells the compiler to return a 0(zero) to the function. telling that the

function ran fine with no errors.

}

this is a closing brace, this "closes" the function so any code in the codeblock after this

will not be apart of the function!

;

this is required after most lines of code, this ends the line of code, certain things do not

need this, like an if, for, and others

If you have any questions please don't hesitate to ask!

There will be more tutorials!!!!

Created by: CoolManBob

[Vindicated]

This guy definatly knows what he's talking about. Look for more from this handsome young man

Would give rep CMB but gotta spread

[Link_S]

the \n is simply called an escape character, this certain one writes a new line, so if i
were to add more text it would be written on the line after Hello World!

Wouldn't it be alot easier to understand for a beginner by using the endline function?

cout << "Like this." << endl << "Beginning a new line" << endl;


Great toturial, it's hard to explain code syntax; +Rep for you

[CoolManBob]

Wouldn't it be alot easier to understand for a beginner by using the endline function?

cout << "Like this." << endl << "Beginning a new line" << endl;


Great toturial, it's hard to explain code syntax; +Rep for you

I guess, but i have always perfered escape characters myself, so that is why i used one instead of using endl

[svedin]

Really nice, i maby will test to script in C++

+Rep to this guide

**Edit**
Will Rep you after 24H, i need to stop to give ppl rep so often

[trimm]

Nice guide, +Rep when it's off cooldown. Do you plan to write more guides?

[Barnzy]

Simple, try code what I code (hacks for multiplayer cheats for cod series)

a much simpler hello world imo is

#include <iostream>

using namespace std;

int main(int nNumberofArgs, char* pszArgs[])

{
cout << "Hello World" << endl;
system("PAUSE");
return 0;
}


instead of /n just endl (end line)

[blackfang500]

system("Pause"); bad idea, avoid that. THere are numerous reasons just google "system ("Pause")"

[Garosie]

use something like

#include <iostream>
#include <string>
using namespace std;

void HelloWorld()
{
string Heya;
cout << "Hello world!" << endl;
cin >> Heya;
cin, Heya;
}

int main()
{
int iCount = 5;
while(iCount < 10)
{
HelloWorld();
}
}

it should now keep running the "Hello World" so i made a cin >> Heya; so that it stops to let u write. if u write something like "Hello" it writes "Hello World" again, untill u exit program, whatever u write it will then repeat "Hello world!"


or for the more noobish programmer :

#include <iostream>
using namespace std;

int main()
{
cout << "Hello World!" << endl;
cin.get();
}