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Full Discussion: C header file and extern
Top Forums Programming C header file and extern Post 302851825 by tornow on Monday 9th of September 2013 06:46:08 PM
Old 09-09-2013
Thanks so much, it seems clear now. I got another question about header files. Say i got checkr.h with:
Code:
void check_argc(int, int);

and the function in checkr.c:
Code:
 void check_argc(int argcount, int n) {         if ( argcount != n ) {                 fprintf(stderr, "ERROR: wrong argument count\n");                 usage();                 exit(EXIT_FAILURE);         } }

From what you say i think i would need to use "extern" in checkr.h ? Can i also use it in the main file (called server.c) ? I know that i don't have to, but it helps me a bit to keep track of the functions without opening and closing files all the time (or using :vsplit). I think it has to do with definition and declaration? I read about it quite often, but never really understand it and usually forget it soon.
 

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Chart::Clicker::Decoration::Legend::Tabular(3pm)	User Contributed Perl Documentation	  Chart::Clicker::Decoration::Legend::Tabular(3pm)

NAME
Chart::Clicker::Decoration::Legend::Tabular - Tabular version of Legend VERSION
version 2.83 SYNOPSIS
my $cc = Chart::Clicker->new; my $series1 = Chart::Clicker::Data::Series->new; my $series2 = Chart::Clicker::Data::Series->new; $cc->legend(Chart::Clicker::Decoration::Legend::Tabular->new( header => [ qw(Name Min Max) ], data => [ [ min(@{ $series1->values }), max(@{ $series1->values }) ], [ min(@{ $series2->values }), max(@{ $series2->values }) ] ] )); DESCRIPTION
Chart::Clicker::Decoration::Legend::Tabular draws a legend on a Chart with tabular data display. The Tabular legend is a legend with a few extra attributes that allow you to pass it data to display. The attributes are c<header> and c<data>. The "header" (optional) allows you to specify the strings to display at the top of the table and the "data" attribute allows you to pass in arrayrefs of strings for display aside each of the series. Note: The first string in the "header" arrayref should be the header for the column above the name of the series. This code does not do anything to verify that you've given the appropriate counts of data. It is expected that you will provide "data" with one arrayref for every series, each containing n elements. Having that, "header" will expect n + 1 elements with one for the series name and the remaining (n) matching the number of elements in each of "data"'s arrayrefs. ATTRIBUTES
border Set/Get this Legend's border. color Set/Get the color to use as the foreground for the legend. data Set/Get the data for this legend. Expects an arrayref of arrayrefs, with one inner arrayref for every series charted. font Set/Get the font used for this legend's items. header Set/Get the header data used for this legend. Expects an arrayref of Strings. insets Set/Get this Legend's insets. item_padding Set/Get the padding for this legend's items. METHODS
has_header Predicate returning true of this legend has a header, else 1. AUTHOR
Cory G Watson <gphat@cpan.org> COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Cold Hard Code, LLC. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.14.2 2012-06-22 Chart::Clicker::Decoration::Legend::Tabular(3pm)
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