{"id":2518,"date":"2025-07-17T10:01:30","date_gmt":"2025-07-17T09:01:30","guid":{"rendered":"https:\/\/workboot.fr\/ciela\/?page_id=2518"},"modified":"2025-07-17T10:20:43","modified_gmt":"2025-07-17T09:20:43","slug":"directives-de-preprocesseur-en-c","status":"publish","type":"page","link":"https:\/\/workboot.fr\/ciela\/directives-de-preprocesseur-en-c\/","title":{"rendered":"Directives de pr\u00e9processeur en C"},"content":{"rendered":"\n<nav aria-label=\"Table des mati\u00e8res\" class=\"wp-block-table-of-contents\"><ol><li><a class=\"wp-block-table-of-contents__entry\" href=\"https:\/\/workboot.fr\/ciela\/directives-de-preprocesseur-en-c\/#definition-directive-de-preprocesseur-en-c\">\ud83d\udcd8 D\u00e9finition : directive de pr\u00e9processeur en C<\/a><\/li><li><a class=\"wp-block-table-of-contents__entry\" href=\"https:\/\/workboot.fr\/ciela\/directives-de-preprocesseur-en-c\/#exemples-courants-de-directives\">\ud83d\udd27 Exemples courants de directives :<\/a><\/li><li><a class=\"wp-block-table-of-contents__entry\" href=\"https:\/\/workboot.fr\/ciela\/directives-de-preprocesseur-en-c\/#en-resume\">\ud83d\udccc En r\u00e9sum\u00e9 :<\/a><\/li><\/ol><\/nav>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"definition-directive-de-preprocesseur-en-c\">\ud83d\udcd8 D\u00e9finition : directive de pr\u00e9processeur en C<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Une <strong>directive de pr\u00e9processeur<\/strong> en C est une <strong>instruction sp\u00e9ciale<\/strong> qui commence par <code>#<\/code> (di\u00e8se) et qui est <strong>trait\u00e9e avant la compilation<\/strong>, lors de la phase de <strong>pr\u00e9compilation<\/strong>.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Elle indique au <strong>pr\u00e9processeur C<\/strong> quoi faire <strong>avant que le code soit compil\u00e9<\/strong>.<\/p>\n<\/blockquote>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"exemples-courants-de-directives\">\ud83d\udd27 Exemples courants de directives :<\/h1>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Directive<\/th><th>R\u00f4le<\/th><th>Exemple<\/th><\/tr><\/thead><tbody><tr><td><code><a href=\"https:\/\/workboot.fr\/ciela\/macro-define\/\">#define<\/a><\/code><\/td><td>D\u00e9clare une <strong>macro<\/strong> ou une <strong>constante<\/strong><\/td><td><code>#define PI 3.14<\/code><\/td><\/tr><tr><td><code>#include<\/code><\/td><td><strong>Inclut<\/strong> un fichier externe<\/td><td><code>#include &lt;stdio.h&gt;<\/code><\/td><\/tr><tr><td><code>#ifdef<\/code> \/ <code>#ifndef<\/code><\/td><td>Teste si une macro est d\u00e9finie<\/td><td><code>#ifdef DEBUG<\/code><\/td><\/tr><tr><td><code>#if<\/code>, <code>#else<\/code>, <code>#endif<\/code><\/td><td>Conditions de compilation<\/td><td><code>#if VERSION == 2<\/code><\/td><\/tr><tr><td><code>#undef<\/code><\/td><td>Supprime une macro<\/td><td><code>#undef PI<\/code><\/td><\/tr><tr><td><code>#pragma<\/code><\/td><td>Instruction sp\u00e9ciale au compilateur<\/td><td><code>#pragma once<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"en-resume\">\ud83d\udccc En r\u00e9sum\u00e9 :<\/h1>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Une directive de pr\u00e9processeur est une <strong>commande sp\u00e9ciale<\/strong>, commen\u00e7ant par <code>#<\/code>, qui <strong>modifie ton code source<\/strong> <strong>avant<\/strong> sa compilation.<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udcd8 D\u00e9finition : directive de pr\u00e9processeur en C Une directive de pr\u00e9processeur en C est une instruction sp\u00e9ciale qui commence par # (di\u00e8se) et qui est trait\u00e9e avant la compilation, lors de la phase de pr\u00e9compilation. Elle indique au pr\u00e9processeur C quoi faire avant que le code soit compil\u00e9. \ud83d\udd27 Exemples courants de directives : [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-2518","page","type-page","status-publish","hentry"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false},"uagb_author_info":{"display_name":"admin","author_link":"https:\/\/workboot.fr\/ciela\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"\ud83d\udcd8 D\u00e9finition : directive de pr\u00e9processeur en C Une directive de pr\u00e9processeur en C est une instruction sp\u00e9ciale qui commence par # (di\u00e8se) et qui est trait\u00e9e avant la compilation, lors de la phase de pr\u00e9compilation. Elle indique au pr\u00e9processeur C quoi faire avant que le code soit compil\u00e9. \ud83d\udd27 Exemples courants de directives :\u2026","_links":{"self":[{"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/pages\/2518","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/comments?post=2518"}],"version-history":[{"count":4,"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/pages\/2518\/revisions"}],"predecessor-version":[{"id":2528,"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/pages\/2518\/revisions\/2528"}],"wp:attachment":[{"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/media?parent=2518"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}