C++ Tutorial - Hello Raspberry Pi

RE: C++ Tutorial - Hello Raspberry Pi

Former Member — Tue, 20 Oct 2015 15:07:56 GMT

Thanks for this nice tutorial. It is admirable that somebody spents so much time to help others. I'm a total newbie, and it's my first contact with c++.

So my first question to chapter 1 is : what is the meaning of the "int" in front of the function main? Does it refer to the error code as integer? So is it always used to define a return code for a function?

RE: C++ Tutorial - Hello Raspberry Pi

workless — Wed, 22 Apr 2015 23:17:45 GMT

Thanks Shaun and others. I found the bug in my code and I am now happily compiling C code on my raspberry pi. Great advice!

RE: C++ Tutorial - Hello Raspberry Pi

Anonymous-342052 — Wed, 22 Apr 2015 10:21:35 GMT

This is a REALLY COOL tutorial [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-84345581-2197-44de-8652-97ce83a30889/8306.contentimage_5F00_1.png:16:16]

RE: C++ Tutorial - Hello Raspberry Pi

shabaz — Mon, 20 Apr 2015 17:35:30 GMT

Hi Chip,

You were rude. Provide your feedback in a polite manner, or keep it to yourself.

RE: C++ Tutorial - Hello Raspberry Pi

shabaz — Mon, 20 Apr 2015 17:08:44 GMT

Shaun wrote and has stood by this tutorial for two years, and is responding to you at no cost, and has been polite throughout.

You've come to it now, and speak of being frustrated from the many experiences _you_ have had talking to programmers as you say.

You talk about programmers having bad communication skills, yet you were the one that was incapable of conveying your findings without being rude. It's not an opinion, it's a fact:

Chip Reuben wrote:

Once again you are incomplete, and in this case just plain wrong. In order to get BOTH OUTPUT AND ERROR to write to the file, you have to use:

RE: C++ Tutorial - Hello Raspberry Pi

shabaz — Mon, 20 Apr 2015 16:07:34 GMT

Hi Chip,

Firstly, Linux shell specifics can be obtained from all over the Internet, it's not a big deal.

Shaun's tutorial covers some C/C++ essentials really well - there may be some typo's but they are easily resolved in the discussion comments, which Shaun is doing, and so are you, _but_ :

Chip Reuben wrote:

Once again you are incomplete, and in this case just plain wrong. In order to get BOTH OUTPUT AND ERROR to write to the file, you have to use:

It sounds from your rude response that you are frustrated with the tutorial. If that is the case, as a suggestion, please keep it civil or to yourself, because no-one wants to hear it. Shaun has spent a lot of effort preparing the tutorial, as a former C++ developer I can confirm that it is mostly error-free (more error-free than some textbooks) and politeness costs nothing from you.

RE: C++ Tutorial - Hello Raspberry Pi

oneleggedredcow — Mon, 20 Apr 2015 14:25:31 GMT

I think I fixed the problem with copying and pasting the compile line. It looks like the second "-" is a weird character.

If the errors are overflowing your screen, try writing the output to a file. To redirect the standard output (stdout), just add a "> file" to the end of your command. However, compile errors go through the error output (stderr). In that case you can redirect the output to a file with a "2> file". It is also pretty common to want to capture both of them. To do this add a ">& file". This will redirect the error output (stderr) into the same stream as the normal output (stdout). So, in this case:

g++ -std=c++0x 01_HelloRPi.cpp -o01_HelloRPi >& errors.txt

Now errors.txt will contain all of the output from the compilation (from stdout and stderr). Just open up that file and then you can see what is going on.

RE: C++ Tutorial - Hello Raspberry Pi

workless — Sun, 19 Apr 2015 23:38:38 GMT

I realize this post is 2 years old but trying to compile the basic 'hello_world.cpp' code on my new Raspberry Pi with Rasbian and having all kinds of trouble. (I'm also new to Linux so totally lost!). I get a long stream of errors when I try to compile the code with g++ and gcc. I've checked both are up to date (I get "0 upgraded, 0 newly installed, ..." for both). The errors are a long series with a lot of them saying things like "... was not declared in this scope" and "... has not been declared". If someone can explain how to pause the compiler output after each screen full or something. Thanks!

RE: C++ Tutorial - Hello Raspberry Pi

oneleggedredcow — Wed, 08 Apr 2015 01:16:34 GMT

If you are referring to the -o01_HelloRPi part of the command, the space between the -o and 01_HelloRPi is optional. It will work both ways.

RE: C++ Tutorial - Hello Raspberry Pi

Former Member — Tue, 25 Nov 2014 15:37:06 GMT

I wan not so much familiar with Raspberry pi language before reading this post. It seems a like very interesting language to work with. I always love to explore new programming language to play with them. [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-84345581-2197-44de-8652-97ce83a30889/contentimage_5F00_2516.png:16:16]