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-   -   I Want to develop apps but have no Developing/C++ skills (https://talk.maemo.org/showthread.php?t=88740)

panjgoori 2013-01-22 09:20
I Want to develop apps but have no Developing/C++ skills
 
Hello Maemo Community. I also want to develop for Nokia N900/Maemo 5 but I have no programming skills :(. and I also don't know C++. Is there are any guides from which i can also develop for Maemo 5 ? I really want to develop apps for N900 as i love my device alot.

Thanks everyone.

electroaudio 2013-01-22 10:24
Re: I Want to develop apps but have no Developing/C++ skills
 
Start with python, it is a much easier language to learn for a beginner and there are plenty of beginner tutorials on the net and almost all that is linuxrelated will work on the N900 too. (The N900 uses GTK for windowmanagement)

To learn C/C++ you should learn assemblyprogramming first. that will make it a lot easier to understand C since C only obfuscates the machinecode below..
( A simple tutorial on assembler, on a cpu wich relies heavily on pointers and similar C specific stuff, http://www.cosmacelf.com/shortcourse.htm )

jedi 2013-01-22 10:35
Re: I Want to develop apps but have no Developing/C++ skills
 
Quote:
Originally Posted by electroaudio (Post 1316558)
To learn C/C++ you should learn assemblyprogramming first. that will make it a lot easier to understand C since C only obfuscates the machinecode below..
What a load of utter crap! Try this. And This.

electroaudio 2013-01-22 10:46
Re: I Want to develop apps but have no Developing/C++ skills
 
Quote:
Originally Posted by jedi (Post 1316563)
What a load of utter crap!
So, do you understand what a pointer is and *why* it exists!?
-Or is it somekind of "magic" for you?

Assembler is *very* easy. And pointers and such stuff that a beginner can have a hard time with in C is very obvious when you have a grasp of how and why assembler works as it does.

juiceme 2013-01-22 10:51
Re: I Want to develop apps but have no Developing/C++ skills
 
To understand pointers it is not necessary to know about ML :)
Just visualizing memory address space is enough :)

electroaudio 2013-01-22 11:01
Re: I Want to develop apps but have no Developing/C++ skills
 
Quote:
Originally Posted by juiceme (Post 1316566)
To understand pointers it is not necessary to know about ML :)
Just visualizing memory address space is enough :)
Yes, but that is something that is very obvious while learning assembler.
-As i see it, its much better to spend an afternoon to learn how ML works instead of spending months on trying to decode the "magic" behind C.

For instance.
set adress 0200 and forward in the memory to "hello world$" then write.

Mov ah,09
mov dx, 0200
call function int 21h

will print "Hello world" on the screen.

-This little routine is easy to understand, and everything from pointers to functioncalls and their parameters are explained here.
..and,everything with numbers like boolean long short signed and unsigned integers and float ... why they exist and why you cant mix them, is also very obvious when you have a grasp of how ML/assembler works.

jedi 2013-01-22 11:20
Re: I Want to develop apps but have no Developing/C++ skills
 
Quote:
Originally Posted by electroaudio (Post 1316570)
Yes, but that is something that is very obvious while learning assembler.
-As i see it, its much better to spend an afternoon to learn how ML works instead of spending months on trying to decode the "magic" behind C.

For instance.
set adress 0200 and forward in the memory to "hello world$" then write.

Mov ah,09
mov dx, 0200
call function int 21h

will print "Hello world" on the screen.

-This little routine is easy to understand, and everything from pointers to functioncalls and their parameters are explained here.
..and,everything with numbers like boolean long short signed and unsigned integers and float and why you cant mix them, is also very obvious when you have a grasp of how ML/assembler works.
Code:
#include <stdio.h>
int main () {
printf ("Hello World!\n");
}

Probably best to let the OP decide what's the easiest path...

don_falcone 2013-01-22 11:43
Re: I Want to develop apps but have no Developing/C++ skills
 
Yeah, and because you'll first have to understand the hardware before actually learning & understanding ML, and even something before that, i'll trow in a recent freebie: Understanding quantum physics in three easy lessons.

People.

:rolleyes:

Next: someone chokes up that HTML5/webcrapps actually are da shiznit. I really expect this to happen here.

electroaudio 2013-01-22 12:12
Re: I Want to develop apps but have no Developing/C++ skills
 
Quote:
Originally Posted by don_falcone (Post 1316580)
Yeah, and because you'll first have to understand the hardware before actually learning & understanding ML, and even something before that, i'll trow in a recent freebie: Understanding quantum physics in three easy lessons.

People.
To understand the necessary hardware in a simple cpu to be able to program it in assembler is very easy.
All you need to know is that there are registers and how these registers are used to access memory. There are even PICTURES aviable... :p
It is so simple that any small kid (except don_falcone, obviously...) can learn it in a day.

...Also, *DONT* confuse assembler with machinelanguage...
There is a *GREAT* difference in the language between ML and assembler.

http://www.applefritter.com/files/images//652-4128.jpg

frafI 2013-01-22 12:46
Re: I Want to develop apps but have no Developing/C++ skills
 
[OT]
Quote:
Originally Posted by electroaudio (Post 1316594)
...Also, *DONT* confuse assembler with machinelanguage...
There is a *GREAT* difference in the language between ML and assembler.
Well, actually there is usually a bijective map between the two, assembler being the human friendlier version of ML.
The greatest downside of assembler is, that there's a unique language for each instruction set. The principles don't change very much (but remember: ARM is a RISC architecture), but to learn the priciples (pointer etc.) you don't need the language (as said before).

[/OT]

@panjgoori: I agree that Python is a good choice, it even has bindings to Gtk and Qt. However starting with Qt and C++ is also possible since Qt only needs a tiny portion of the features of C and C++ on your side (it uses more of them internally). Another advantage is, that you don't need to install scratchbox. Qt SDK comes with a tool called "mad" that alows you to use the same comands for building the software for normal Linux and Maemo (e.g. "dpkg-buildpackage" becomes "mad dpkg-buildpackage").


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