{"id":145067,"date":"2025-05-14T15:32:26","date_gmt":"2025-05-14T10:02:26","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=145067"},"modified":"2025-05-14T15:32:26","modified_gmt":"2025-05-14T10:02:26","slug":"c-pointers","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/c-pointers\/","title":{"rendered":"Pointers in C Programming"},"content":{"rendered":"<h3>Program 1<\/h3>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">\/\/  Pointers in C\r\n#include&lt;stdio.h&gt;\r\n#include&lt;conio.h&gt;\r\nint main()\r\n{\r\n    system(\"cls\");\r\n     int *a1;\r\n     float *a2;\r\n     double *a3;\r\n     char *a4;\r\n     printf(\"\\n int type: %d\",sizeof(*a1));\r\n     printf(\"\\n float type: %d\",sizeof(*a2));\r\n     printf(\"\\n double type: %d\",sizeof(*a3));\r\n     printf(\"\\n char type: %d\",sizeof(*a4));\r\n\r\n\r\n\r\n\r\n\r\n\r\n\/\/    int a=10,b=5,*p,*r;\r\n\/\/    p=&amp;a;\r\n\/\/    r=&amp;b;\r\n\/\/    ++*p;\r\n\/\/    a=a+3;\r\n\/\/    --*r;\r\n\/\/    b=b+5;\r\n\/\/    r=&amp;a;\r\n\/\/    ++a;\r\n\/\/    ++*p;\r\n\/\/    ++*r;\r\n\/\/    printf(\"\\n a=%d\",a);\r\n\/\/    printf(\"\\n *p=%d\",*p);\r\n\/\/    printf(\"\\n *r=%d\",*r);\r\n\/\/    printf(\"\\n b=%d\",b);\r\n   \/\/   int a=10,*p,**r;\r\n    \/\/    p=&amp;a;\r\n    \/\/    r=&amp;p;\r\n    \/\/    printf(\"value of a %d: \",a);\r\n    \/\/    printf(\"\\nvalue of p %u: \",p);\r\n    \/\/    printf(\"\\nvalue of *p %d: \",*p);\r\n    \/\/    printf(\"\\nvalue of r %u: \",r);\r\n    \/\/    printf(\"\\nvalue of *r %u: \",*r);\r\n    \/\/    printf(\"\\nvalue of **r %d: \",**r);\r\n    \/\/     ++**r;\r\n    \/\/     printf(\"\\n------------------------\");\r\n    \/\/     printf(\"\\nvalue of a %d: \",a);\r\n    \/\/     printf(\"\\nvalue of *p %d: \",*p);\r\n    \/\/     printf(\"\\nvalue of **r %d: \",**r);\r\n\r\n    return 0;\r\n}\r\n     \/\/  int a=50,*p;\r\n    \/\/  p=&amp;a;\r\n    \/\/  ++p;\r\n\r\n    \/\/  printf(\"Value is %d: \",a); \r\n    \/\/  printf(\"\\nValue is %d: \",*p);\r\n     \/\/printf(\"\\n Address is %u: \",p);\r\n    \/\/  printf(\"Value is %d: \",a);\r\n    \/\/  printf(\"\\n Address is %u: \",&amp;a);<\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Program 1 \/\/ Pointers in C #include&lt;stdio.h&gt; #include&lt;conio.h&gt; int main() { system(&#8220;cls&#8221;); int *a1; float *a2; double *a3; char *a4; printf(&#8220;\\n int type: %d&#8221;,sizeof(*a1)); printf(&#8220;\\n float type: %d&#8221;,sizeof(*a2)); printf(&#8220;\\n double type: %d&#8221;,sizeof(*a3)); printf(&#8220;\\n char&#46;&#46;&#46;<\/p>\n","protected":false},"author":581,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19488],"tags":[33870,23914,28585,20266,29219,29218,33871,23960,34205],"class_list":["post-145067","post","type-post","status-publish","format-standard","hentry","category-c-programming","tag-c-program-on-pointers","tag-c-programming","tag-c-tutorial","tag-c-pointers","tag-c-practical","tag-c-program","tag-pointers","tag-pointers-in-c","tag-pointers-in-c-programming"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pointers in C Programming - DataFlair<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/data-flair.training\/blogs\/c-pointers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pointers in C Programming - DataFlair\" \/>\n<meta property=\"og:description\" content=\"Program 1 \/\/ Pointers in C #include&lt;stdio.h&gt; #include&lt;conio.h&gt; int main() { system(&quot;cls&quot;); int *a1; float *a2; double *a3; char *a4; printf(&quot;n int type: %d&quot;,sizeof(*a1)); printf(&quot;n float type: %d&quot;,sizeof(*a2)); printf(&quot;n double type: %d&quot;,sizeof(*a3)); printf(&quot;n char&#046;&#046;&#046;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/data-flair.training\/blogs\/c-pointers\/\" \/>\n<meta property=\"og:site_name\" content=\"DataFlair\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/DataFlairWS\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-05-14T10:02:26+00:00\" \/>\n<meta name=\"author\" content=\"DataFlair Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@DataFlairWS\" \/>\n<meta name=\"twitter:site\" content=\"@DataFlairWS\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"DataFlair Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Pointers in C Programming - DataFlair","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/data-flair.training\/blogs\/c-pointers\/","og_locale":"en_US","og_type":"article","og_title":"Pointers in C Programming - DataFlair","og_description":"Program 1 \/\/ Pointers in C #include&lt;stdio.h&gt; #include&lt;conio.h&gt; int main() { system(\"cls\"); int *a1; float *a2; double *a3; char *a4; printf(\"n int type: %d\",sizeof(*a1)); printf(\"n float type: %d\",sizeof(*a2)); printf(\"n double type: %d\",sizeof(*a3)); printf(\"n char&#46;&#46;&#46;","og_url":"https:\/\/data-flair.training\/blogs\/c-pointers\/","og_site_name":"DataFlair","article_publisher":"https:\/\/www.facebook.com\/DataFlairWS\/","article_published_time":"2025-05-14T10:02:26+00:00","author":"DataFlair Team","twitter_card":"summary_large_image","twitter_creator":"@DataFlairWS","twitter_site":"@DataFlairWS","twitter_misc":{"Written by":"DataFlair Team","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/data-flair.training\/blogs\/c-pointers\/#article","isPartOf":{"@id":"https:\/\/data-flair.training\/blogs\/c-pointers\/"},"author":{"name":"DataFlair Team","@id":"https:\/\/data-flair.training\/blogs\/#\/schema\/person\/c187795dc82ab948373cca526df7c445"},"headline":"Pointers in C Programming","datePublished":"2025-05-14T10:02:26+00:00","mainEntityOfPage":{"@id":"https:\/\/data-flair.training\/blogs\/c-pointers\/"},"wordCount":6,"commentCount":0,"publisher":{"@id":"https:\/\/data-flair.training\/blogs\/#organization"},"keywords":["c program on pointers","c programming","c tutorial","C++ Pointers","c++ practical","c++ program","pointers","pointers in C","pointers in c programming"],"articleSection":["C Tutorials"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/data-flair.training\/blogs\/c-pointers\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/data-flair.training\/blogs\/c-pointers\/","url":"https:\/\/data-flair.training\/blogs\/c-pointers\/","name":"Pointers in C Programming - DataFlair","isPartOf":{"@id":"https:\/\/data-flair.training\/blogs\/#website"},"datePublished":"2025-05-14T10:02:26+00:00","breadcrumb":{"@id":"https:\/\/data-flair.training\/blogs\/c-pointers\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/data-flair.training\/blogs\/c-pointers\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/data-flair.training\/blogs\/c-pointers\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Blog Home","item":"https:\/\/data-flair.training\/blogs\/"},{"@type":"ListItem","position":2,"name":"C Tutorials","item":"https:\/\/data-flair.training\/blogs\/category\/c-programming\/"},{"@type":"ListItem","position":3,"name":"Pointers in C Programming"}]},{"@type":"WebSite","@id":"https:\/\/data-flair.training\/blogs\/#website","url":"https:\/\/data-flair.training\/blogs\/","name":"DataFlair","description":"Learn Today. Lead Tomorrow.","publisher":{"@id":"https:\/\/data-flair.training\/blogs\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/data-flair.training\/blogs\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/data-flair.training\/blogs\/#organization","name":"DataFlair","url":"https:\/\/data-flair.training\/blogs\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/data-flair.training\/blogs\/#\/schema\/logo\/image\/","url":"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2016\/07\/Data-Flair.png","contentUrl":"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2016\/07\/Data-Flair.png","width":106,"height":48,"caption":"DataFlair"},"image":{"@id":"https:\/\/data-flair.training\/blogs\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/DataFlairWS\/","https:\/\/x.com\/DataFlairWS","https:\/\/www.linkedin.com\/company\/dataflair-web-services-pvt-ltd\/","https:\/\/www.youtube.com\/user\/DataFlairWS"]},{"@type":"Person","@id":"https:\/\/data-flair.training\/blogs\/#\/schema\/person\/c187795dc82ab948373cca526df7c445","name":"DataFlair Team","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/2302ebc438084d2f1f993edc1996a0aae01332e81f3227cba8df0c48ec010ca4?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/2302ebc438084d2f1f993edc1996a0aae01332e81f3227cba8df0c48ec010ca4?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/2302ebc438084d2f1f993edc1996a0aae01332e81f3227cba8df0c48ec010ca4?s=96&d=mm&r=g","caption":"DataFlair Team"},"description":"DataFlair Team provides high-impact content on programming, Java, Python, C++, DSA, AI, ML, data Science, Android, Flutter, MERN, Web Development, and technology. We make complex concepts easy to grasp, helping learners of all levels succeed in their tech careers.","url":"https:\/\/data-flair.training\/blogs\/author\/dfteam6\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/data-flair.training\/blogs\/wp-json\/wp\/v2\/posts\/145067","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/data-flair.training\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/data-flair.training\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/data-flair.training\/blogs\/wp-json\/wp\/v2\/users\/581"}],"replies":[{"embeddable":true,"href":"https:\/\/data-flair.training\/blogs\/wp-json\/wp\/v2\/comments?post=145067"}],"version-history":[{"count":2,"href":"https:\/\/data-flair.training\/blogs\/wp-json\/wp\/v2\/posts\/145067\/revisions"}],"predecessor-version":[{"id":145077,"href":"https:\/\/data-flair.training\/blogs\/wp-json\/wp\/v2\/posts\/145067\/revisions\/145077"}],"wp:attachment":[{"href":"https:\/\/data-flair.training\/blogs\/wp-json\/wp\/v2\/media?parent=145067"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/data-flair.training\/blogs\/wp-json\/wp\/v2\/categories?post=145067"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/data-flair.training\/blogs\/wp-json\/wp\/v2\/tags?post=145067"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}