Hi Jeff,
Unix is one of those things which takes a long time and a lot of practice to
use properly. Whole books have been written about the subject, and any general
Unix or Linux book should mostly be applicable to OS X. Do you have a
Bookshare account? O'Riley media publishes many texts ou might be interested
in, such as Learning Unix for Mac OS X. Beyond this, search the Internet for
Unix tutorials, they should apply quite well overall.
As for the specific case you're wondering about here, the reason your program
isn't running is that you're not quite using the correct command. YOu want a
period followed by a slash, not just a slash. ./foo
vi is a whole different kettle of fish, and again the Internet and literature
is your best friend. I will tell you that to quit, you want to first hit
escape, and then type ":wq", without the quotes, to save your work. ":q" on
its own will quit unless you have unsaved changes, in which case you type ":q!"
to abandon them.
Hope this helps,
Zack.
On Jul 5, 2011, at 9:35 PM, Geoff Waaler wrote:
> Making a little progress. I since learned that I should be able to build my
> foo executable in terminal by going to the directory and entering:
> "g++ foo.cpp -o foo".
>
> If I understand correctly assuming a clean compile, I should be able to run
> the executable by entering "/foo"?
>
> If I enter just the command without a slash, I receive the "command not
> found" message, where as when I proceed the command with a slash, it
> indicates that the file or directory does not exist.
>
> When I enter "vi filename" I can see my file, but have not yet ascertained
> how to exit the editor and get back to a command prompt?
>
> Again, TIA for any info or documentation you can point me to describing how
> to get going with terminal.
>
> Best regards.
> Geoff
>
> On Jul 5, 2011, at 6:45 PM, Geoff Waaler wrote:
>
>> Hello Zack,
>>
>> Thanks so much for looking into this. You indirectly answered one of my
>> questions -- it's unnecessary to create an xCode project just to build and
>> run a simple .cpp file (yay!!!).
>>
>> Having not used Unix except for a very brief period in the early 80s when VI
>> was a line editor, perhaps you or someone else following this thread can
>> indulge a few novice questions. I gather VI is better for creating a .cpp
>> file than the textEdit app? If so, why? What is the process for building
>> and running from the command line?
>>
>> Thanks again and best regards.
>> Geoff
>>
>> On Jul 5, 2011, at 6:08 PM, Zachary Kline wrote:
>>
>>> Hi Jeff,
>>> Interesting. I copied and pasted your program, exactly as given, from the
>>> email to a vi editing session and compiled it from the terminal. The
>>> output was what you would expect, i.e. it worked correctly.
>>> I'm not sure why Xcode would give you a different result with such a simple
>>> program, and am afraid I'm just learning to use it myself, so know very
>>> little about it.
>>> Very confused,
>>> Zack.
>>> On Jul 5, 2011, at 2:34 PM, Geoff Waaler wrote:
>>>
>>>> Greetings all,
>>>>
>>>> I am getting started with C++ using XCode 4.0.2.
>>>>
>>>> The following was created as a C++ command line tool. The objective of
>>>> this "main.cpp" code was to accept a n integer from the console and
>>>> display it:
>>>>
>>>> #include <iostream>
>>>> using namespace std;
>>>>
>>>> int main() {
>>>> int num;
>>>> cout << "Please enter an integer: ";
>>>> cin >> num;
>>>> cout << "Thanks for typing. You entered: " << num << endl;
>>>> }
>>>>
>>>> Upon running this code via command-r I receive the message that output was
>>>> generated. The log window appears to stop and prompt me as expected -- I
>>>> see the following:
>>>>
>>>> GNU gdb 6.3.50-20050815 (Apple version gdb-1518) (Sat Feb 12 02:52:12 UTC
>>>> 2011)
>>>> Copyright 2004 Free Software Foundation, Inc.
>>>> GDB is free software, covered by the GNU General Public License, and you
>>>> are
>>>> welcome to change it and/or distribute copies of it under certain
>>>> conditions.
>>>> Type "show copying" to see the conditions.
>>>> There is absolutely no warranty for GDB. Type "show warranty" for details.
>>>> This GDB was configured as "x86_64-apple-darwin".tty /dev/ttys000
>>>> [Switching to process 10756 thread 0x0]
>>>> Please enter an integer:
>>>>
>>>> When I enter an integer (e.g. 9) the following text appears:
>>>>
>>>> Please enter an integer: 9
>>>> Thanks for typing. You entered: 60106
>>>> Program ended with exit code: 0
>>>>
>>>> Initializing num (ie int num = 0;) causes the garbage to disappear ,
>>>> except that the initialized value is always displayed regardless what I
>>>> enter in response to the prompt.
>>>>
>>>> I tried building a unix executable and running it from terminal, but the
>>>> results did not vary. An item in Google suggested running debug in
>>>> "standard debug" mode, but from what I can find this may no longer be
>>>> applicable in xCode 4?
>>>>
>>>> If anyone can offer a suggestion I would be most appreciative. Perhaps
>>>> there is another list that is mor appropriate for this type of query?
>>>>
>>>> Best regards.
>>>> Geoff
>>>>
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>>>
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>>
>
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