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<b>Warning</b>:  Declaration of action_plugin_subjectindex_indexer::register(&$controller) should be compatible with DokuWiki_Action_Plugin::register(Doku_Event_Handler $controller) in <b>/data/web/virtuals/28604/virtual/www/subdom/bo/lib/plugins/subjectindex/action/indexer.php</b> on line <b>15</b><br />
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<b>Warning</b>:  Declaration of action_plugin_mathjax_enable::register(Doku_Event_Handler &$controller) should be compatible with DokuWiki_Action_Plugin::register(Doku_Event_Handler $controller) in <b>/data/web/virtuals/28604/virtual/www/subdom/bo/lib/plugins/mathjax/action/enable.php</b> on line <b>62</b><br />
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<b>Warning</b>:  Declaration of action_plugin_googleanalytics::register(&$controller) should be compatible with DokuWiki_Action_Plugin::register(Doku_Event_Handler $controller) in <b>/data/web/virtuals/28604/virtual/www/subdom/bo/lib/plugins/googleanalytics/action.php</b> on line <b>40</b><br />
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<b>Warning</b>:  Declaration of action_plugin_folded::register(&$controller) should be compatible with DokuWiki_Action_Plugin::register(Doku_Event_Handler $controller) in <b>/data/web/virtuals/28604/virtual/www/subdom/bo/lib/plugins/folded/action.php</b> on line <b>40</b><br />
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<b>Warning</b>:  Declaration of action_plugin_hidden::register(&$controller) should be compatible with DokuWiki_Action_Plugin::register(Doku_Event_Handler $controller) in <b>/data/web/virtuals/28604/virtual/www/subdom/bo/lib/plugins/hidden/action.php</b> on line <b>28</b><br />
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<b>Warning</b>:  Declaration of action_plugin_include::register(&$controller) should be compatible with DokuWiki_Action_Plugin::register(Doku_Event_Handler $controller) in <b>/data/web/virtuals/28604/virtual/www/subdom/bo/lib/plugins/include/action.php</b> on line <b>354</b><br />
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<b>Warning</b>:  Declaration of action_plugin_tag::register(&$contr) should be compatible with DokuWiki_Action_Plugin::register(Doku_Event_Handler $controller) in <b>/data/web/virtuals/28604/virtual/www/subdom/bo/lib/plugins/tag/action.php</b> on line <b>175</b><br />
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<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /data/web/virtuals/28604/virtual/www/subdom/bo/lib/plugins/subjectindex/action/indexer.php:15) in <b>/data/web/virtuals/28604/virtual/www/subdom/bo/inc/auth.php</b> on line <b>532</b><br />
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<b>Warning</b>:  preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in <b>/data/web/virtuals/28604/virtual/www/subdom/bo/inc/auth.php</b> on line <b>818</b><br />
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<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /data/web/virtuals/28604/virtual/www/subdom/bo/lib/plugins/subjectindex/action/indexer.php:15) in <b>/data/web/virtuals/28604/virtual/www/subdom/bo/inc/actions.php</b> on line <b>656</b><br />
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<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /data/web/virtuals/28604/virtual/www/subdom/bo/lib/plugins/subjectindex/action/indexer.php:15) in <b>/data/web/virtuals/28604/virtual/www/subdom/bo/inc/actions.php</b> on line <b>656</b><br />
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<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /data/web/virtuals/28604/virtual/www/subdom/bo/lib/plugins/subjectindex/action/indexer.php:15) in <b>/data/web/virtuals/28604/virtual/www/subdom/bo/inc/actions.php</b> on line <b>656</b><br />
======C versus C++======
  * [[wp>Compatibility_of_C_and_C++]]

====== void *malloc() ======
V C je **void* ** //generický// [[pointer]] a lze:
<code c>
int i = 5;
int *pi;

void *p = &i; //lze do ně uložit různé typy pointerů
pi = p;       //lze jej uložit do jakéhokoli pointeru
</code>
Ale nejčastější "konstrukcí" je:
<code c>
struct node *pnode = (struct node *)malloc(sizeof(struct node));
//casting návratové hodnoty malloc() není od c89 vůbec třeba:
// malloc() vrací---v (void*) !!!
struct node *pnode = malloc(sizeof *pnode);
                          //^^^^^^^^^^^^^---lze i takto! není třeba sizeof(type)!
</code>
Podle mne je to způsobeno používání "vývojových" prostředí (Code::blocks, VisualStudio), které
defaultně *.c zdrojáky pokládají za C++ kód, resp. //projekt// defaultně konfigurují v C++ režimu.

To nemluvím o nepoužívaní ''extern "C" { deklarace }'' v hlavičkových souborech! TODO