Re: C code block: no return values

[Roger Mason <rmason@mun.ca>]

Hello Eric,

On 04/16/2013 04:15 PM, Eric Schulte wrote:
> Roger Mason <rmason@mun.ca> writes:
>
>> Hello,
>>
>> I'm working through examples in "A Multi-Language Computing Environment for
>> Literate Programming and Reproducible Research" by Shulte et al. J.
>> Stat. Software, 46/3, 2012.
>>
>> This example compiles but results are not returned to the Org-mode buffer:
>>
>> Hi Roger,
>>
>> Since the publication of that paper, the code block execution engine has
>> begun checking the return value of the invoked program to ensure it
>> exits with success before parsing the output.  The C program in this
>> example actually returns the value of the final printf, which is
>> non-zero and looks like a return.
>>
>> To get this example working with the latest version of Org-mode, one
>> needs to added a "return 0;" to the end of the last code block, yielding
>> the following.
>>
>> #+name: main
>> #+begin_src C
>> int main(int argc, char *argv[]) {
>> int lst[argc-1];
>> int i;
>> for(i=1;i<argc;i++)
>> lst[i-1] = atoi(argv[i]);
>> sort(lst, argc-1);
>> for(i=1;i<argc;i++)
>> printf("%d ", lst[i-1]);
>> printf("\n");
>> return 0;
>> }
>> #+end_src
>>
>> With this change the example works as expected on my system.
>>
>> Org-mode should do a better job of alerting the user to the reason why
>> it is not returning a result.
>>
>> Cheers,
>>
Thank you.  It works here too.

Best wishes,
Roger


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