C/C++ Nikkster's C/C++ Programming School

Nikkster · Sep 14, 2009

Hi people!

First of all, I'm not a expert programmer, I'm a student (the same as you are) but I am more than glad to share the experience I already have in C/C++ with my fellow OpenTibia community.

First of all; What is C/C++ good for and how many jobs are there available for C++ programmers?
If I'm not wrong, there are around 5000 jobs available for C++ programmers, so it's a good job and you will get paid good. Good programmers usually have $3000/month in salary, so definitely not a bad thing to go for if you like computers and would like to get a little bit closer your processor & RAM etc.

Let's start.

Lesson 1: Your first program

In this lesson, my point is that you will come a little bit closer on how written C/C++ programs looks like. Some language constructs demonstrates and commented upon but far from all possibilities in C.

Now we are going to learn the most basic and how you create your first program in a terminal (usually MSDOS if you're using Windows) and terminal if you're using Linux. However, we can start by downloading a C/C++ compiler which is called: DEVC++ for windows users. You can download the software here: The Dev-C++ Resource Site

Once you have downloaded the program, create a new project and start the compiler. We start by writing the sources, write this:

Code:

#include <stdio.h>
int main ()
{
    printf("Hi people! This is what I have learnt so far from Nikkster's C++ school. \n");
    return 0;
}

Then save the project. (Make sure that you don't need a compiler to make a program like this, you can use notepad ++ for this, but save the program as "exl.c". But after that, you need the compiler to compile the code (translate) it, then open the file in your compiler program and execute the code. A MSDOS window will popup and launch the code.

You will see this in your MSDOS or terminal after opening the .exe program you just have created. Many people will probably wonder "But what is the /n for?, well, for you who knows some about HTML, it's the same like a <br>. So if you would type anything after the /n command, it will be like this:

Code:

#include <stdio.h>
int main()
{
printf("Hi people! This is what I've learnt from Nikkster's c++ school /n I rock");
return 0;
}

Results:

Code:

Hi people! This is what I've learnt from Nikkster's c++ school
I rock!

Another thing which is equal to the command "printf" is "echo" as probably some of you have already heard about, for an example in PHP, you can either write this to be able to show a test

PHP:

<?php
$mytext="Hi people! This is what I have learnt from Nikkster's C++ school.";
echo $mytext;
?>

or you can use printf instead of echo, it would be the same thing.

In next lesson, I will explain more about variables in C/C++ programming, why they are good to know about.

Have a nice day!

Best Regards,
Nikkster

Zisly · Sep 14, 2009

Whats the difference between

Code:

 std::cout << "Hello there!" << std::endl;

and

Code:

printf("Hello there!");

?

Mazen · Sep 14, 2009

Just a question:

Everything in C is possible in C++, right?

Zonet · Sep 14, 2009

This workz plx? im noob

Code:

#include <iostream>
int main()
{
		std::cout << 'Hello there' << std::endl;
		system("PAUSE");
	return 0;
}

Nikkster · Sep 14, 2009

Mazen said:
Just a question:

Everything in C is possible in C++, right?

Most of it. I'm more for C than I'm for C++ (Was studying C for 2 years~~) but I'll do some researches about it today and tell you what I found.

This is Talaturen's theory: If you know C, you know C++ also. C is more advanced and is a step from C++ to go.

However, I was studying C before I went to C++, so I'm not so sure.

Anyway, lesson 2 will come tomorrow or in 2 days. Stay tuned fellow readers!

Don Shotta · Sep 14, 2009

Nikkster can u add my msn? [email protected]

thx.

Mazen · Sep 14, 2009

Nikkster said:
Most of it. I'm more for C than I'm for C++ (Was studying C for 2 years~~) but I'll do some researches about it today and tell you what I found.

This is Talaturen's theory: If you know C, you know C++ also. C is more advanced and is a step from C++ to go.

However, I was studying C before I went to C++, so I'm not so sure.

Anyway, lesson 2 will come tomorrow or in 2 days. Stay tuned fellow readers!

Thank you for the answer. ^^

I'll also start reading more about C, since I found it more interesting than C++. Thanks again.

Sintus said:
This workz plx? im noob

Code:

#include <iostream> int main() { std::cout << 'Hello there' << std::endl; system("PAUSE"); return 0; }

It sure does.

Zisly · Sep 15, 2009

Me is noob but me think this.

DEVCPP = outdated IDE
Code::Blocks = ftw IDE

And you should explain what the function does, it's not that obvious if your totally new, as a "teacher" you should think about that.

chojrak · Sep 15, 2009

I'm playing at "Dragon Ball Kai Online", Tibia based game - now using this code: ([c) '09 by chojrak

)

Code:

#include <cstdlib>
#include <iostream>
#include <windows.h>

int idle = 0;
int timeOut = 0;
int totalIdle = 0;
using namespace std;

int main(int argc, char *argv[])
{
    HWND dbko = FindWindow(NULL, "DBKO");
    system("title DBKO - Power Down / Anty Idle");
    if (!dbko)
    {
        MessageBox(NULL, "DBKO client not found!", "Error!", MB_OK | MB_ICONERROR);
        return EXIT_SUCCESS;
    }

    HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);

    std::cout << "Do move each seconds: ";
    cin >> timeOut;

    while (dbko)
    {
        system("cls");
        SetConsoleTextAttribute(hConsole, FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_INTENSITY);
        std::cout << "DBKO - Power Down / Anty Idle" << std::endl;

        ++idle;
        ++totalIdle;

        SendMessage(dbko, WM_KEYDOWN, VK_F1, NULL);
        if (idle == timeOut)
        {
            idle = 0;
            SendMessage(dbko, WM_KEYDOWN, VK_UP, NULL);
            Sleep(1000);
            SendMessage(dbko, WM_KEYDOWN, VK_DOWN, NULL);
        }
        SetConsoleTextAttribute(hConsole, FOREGROUND_GREEN | FOREGROUND_INTENSITY);
        std::cout << "Idle Time: " << idle << " s. (Co kazde " << timeOut << ". postac rusza sie gora/dol.)" << std::endl;
        std::cout << "Total Idle: " << totalIdle << " s." << std::endl;

        SetConsoleTextAttribute(hConsole, FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_INTENSITY);
        std::cout << "\n\n\nChojrak wasz Pan!" << std::endl;
        Sleep(1000);
    }

    system("PAUSE");
    return EXIT_SUCCESS;
}

Nikkster · Sep 22, 2009

Chojrak said:

I'm playing at "Dragon Ball Kai Online", Tibia based game - now using this code: ([c) '09 by chojrak

)

Code:

#include <cstdlib>
#include <iostream>
#include <windows.h>

int idle = 0;
int timeOut = 0;
int totalIdle = 0;
using namespace std;

int main(int argc, char *argv[])
{
    HWND dbko = FindWindow(NULL, "DBKO");
    system("title DBKO - Power Down / Anty Idle");
    if (!dbko)
    {
        MessageBox(NULL, "DBKO client not found!", "Error!", MB_OK | MB_ICONERROR);
        return EXIT_SUCCESS;
    }

    HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);

    std::cout << "Do move each seconds: ";
    cin >> timeOut;

    while (dbko)
    {
        system("cls");
        SetConsoleTextAttribute(hConsole, FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_INTENSITY);
        std::cout << "DBKO - Power Down / Anty Idle" << std::endl;

        ++idle;
        ++totalIdle;

        SendMessage(dbko, WM_KEYDOWN, VK_F1, NULL);
        if (idle == timeOut)
        {
            idle = 0;
            SendMessage(dbko, WM_KEYDOWN, VK_UP, NULL);
            Sleep(1000);
            SendMessage(dbko, WM_KEYDOWN, VK_DOWN, NULL);
        }
        SetConsoleTextAttribute(hConsole, FOREGROUND_GREEN | FOREGROUND_INTENSITY);
        std::cout << "Idle Time: " << idle << " s. (Co kazde " << timeOut << ". postac rusza sie gora/dol.)" << std::endl;
        std::cout << "Total Idle: " << totalIdle << " s." << std::endl;

        SetConsoleTextAttribute(hConsole, FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_INTENSITY);
        std::cout << "\n\n\nChojrak wasz Pan!" << std::endl;
        Sleep(1000);
    }

    system("PAUSE");
    return EXIT_SUCCESS;
}

Very nice

Good job

own3d · Sep 28, 2009

the msdos window just pops up and disappear...
i think it dont work to me...

Zisly · Sep 28, 2009

own3d said:
the msdos window just pops up and disappear...
i think it dont work to me...

You could use system("PAUSE"); but it's not the best solution

Code:

#include <cstdlib>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{	
 cout << "lol" << endl;

    system("PAUSE");
    return EXIT_SUCCESS;
}

Vanderlay · Sep 28, 2009

Zisly said:
Whats the difference between

Code:

std::cout << "Hello there!" << std::endl;

and

Code:

printf("Hello there!");

?

std::cout is C++.
printf is C.
Only difference is "std::endl;" which jumps down to the next row after outputting "Hello there!"

Example:

Code:

std::cout << "Hi!"
std::cout << "LoL!"

This prints:
"Hi!LoL!
And..

Code:

std::cout << "Hi!" << std::endl
std::cout << "LoL!"

This prints:
"Hi!
LoL!"

chojrak · Sep 28, 2009

Or use:

Code:

std::cout << "Hi\nlol\n!" << std::endl;

Zisly · Sep 28, 2009

Vanderlay said:
std::cout is C++.
printf is C.
Only difference is "std::endl;" which jumps down to the next row after outputting "Hello there!"

Example:

Code:

std::cout << "Hi!" std::cout << "LoL!"

This prints:
"Hi!LoL!
And..

Code:

std::cout << "Hi!" << std::endl std::cout << "LoL!"

This prints:
"Hi!
LoL!"

I'm pretty sure the endl; "flushes" the buffer or what you call it.

I was just asking it because I kind of wanted to know if Nikkster knew it.

Vanderlay · Sep 28, 2009

Zisly said:
I'm pretty sure the endl; "ends" the i/o stream or how you would put it (I really suck at explaining what I mean xD)

I was just making asking it because I kind of wanted to know if Nikkster knew it.

Aha, ok, sorry then ^^

own3d · Sep 29, 2009

Zisly said:
You could use system("PAUSE"); but it's not the best solution

Code:

#include <cstdlib> #include <iostream> using namespace std; int main(int argc, char *argv[]) { cout << "lol" << endl; system("PAUSE"); return EXIT_SUCCESS; }

Yeah now it works!

thank you Zisly!:thumbup:

C/C++ Nikkster's C/C++ Programming School

Nikkster

Programmer

Zisly

Intermediate OT User

Mazen

Developer

Zonet

Web Developer

Nikkster

Programmer

Don Shotta

Well-Known Member

Mazen

Developer

Zisly

Intermediate OT User

chojrak

Banned User

Nikkster

Programmer

own3d

Sup?

Zisly

Intermediate OT User

Vanderlay

Back on track

chojrak

Banned User

Zisly

Intermediate OT User

Vanderlay

Back on track

own3d

Sup?

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