{"id":144576,"date":"2025-03-17T16:46:48","date_gmt":"2025-03-17T11:16:48","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=144576"},"modified":"2025-03-17T16:46:48","modified_gmt":"2025-03-17T11:16:48","slug":"pointers-in-c","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/pointers-in-c\/","title":{"rendered":"Pointers in C"},"content":{"rendered":"<h3>Program 1<\/h3>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">\/\/ Implementation of pointer and pointer to pointer\r\n#include&lt;stdio.h&gt;\r\n#include&lt;conio.h&gt;\r\nint main()\r\n{\r\n       int a=50,*p;\r\n       system(\"cls\");\r\n    \/\/    printf(\"Value is: %d\",a);\r\n    \/\/    printf(\"\\nAddress is: %u\",&amp;a);\r\n       p=&amp;a;\r\n       printf(\"a=%d *p=%d  \",a,*p);\r\n         ++*p;\r\n         ++a;\r\n         printf(\"a=%d *p=%d  \",a,*p);\r\n\r\nreturn 0;\r\n}<\/pre>\n<h3>Program 2<\/h3>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">\/\/ Implementation of pointer and pointer to pointer\r\n#include&lt;stdio.h&gt;\r\n#include&lt;conio.h&gt;\r\nint main()\r\n{\r\n       int a=50,*p,**r;\r\n       system(\"cls\");\r\n      p=&amp;a;  \/\/pointer\r\n      r=&amp;p;  \/\/pointer to pointer\r\n      \r\n      printf(\"a= %d\",a);       \/\/  50\r\n      printf(\"\\np= %u\",p);    \/\/ address of p\r\n      printf(\"\\n*p= %d\",*p); \/\/ 50 \r\n      printf(\"\\nr= %u\",r);    \/\/ address of r\r\n      printf(\"\\n*u= %u\",*r);  \/\/ address of p\r\n      printf(\"\\n**r= %d\",**r);  \/\/ 50\r\n       ++a;\r\n       ++*p;\r\n       ++**r;\r\n       printf(\"\\na= %d\",a);       \r\n       printf(\"\\na= %d\",*p);       \r\n       printf(\"\\na= %d\",**r);       \r\nreturn 0;\r\n}<\/pre>\n<h3>Program 3<\/h3>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">\/\/ Implementation of swaping using call by reference\r\n#include&lt;stdio.h&gt;\r\n#include&lt;conio.h&gt;\r\nvoid swap( int *p,int *r);\r\nint main()\r\n{\r\n        int x,y;\r\n        system(\"cls\");\r\n        printf(\"\\nEnter two number\");\r\n        scanf(\"%d %d\",&amp;x,&amp;y);\r\n        printf(\"\\n Before swaping %d %d\",x,y);\r\n        swap(&amp;x,&amp;y);  \/\/ Call by reference \r\n        printf(\"\\n After swaping %d %d\",x,y);\r\n        return 0;\r\n}\r\nvoid swap( int *p,int *r)\r\n{\r\n    int c;\r\n    c=*p;\r\n    *p=*r;\r\n    *r=c;\r\n}\r\n<\/pre>\n<h3>Program 4<\/h3>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">\/\/ Implementation of swaping using call by reference\r\n#include&lt;stdio.h&gt;\r\n#include&lt;conio.h&gt;\r\nint main()\r\n{\r\n      int *a;\r\n    system(\"cls\");\r\n    printf(\"%d\",sizeof(a));\r\n\r\n     return 0;  \r\n}\r\n<\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Program 1 \/\/ Implementation of pointer and pointer to pointer #include&lt;stdio.h&gt; #include&lt;conio.h&gt; int main() { int a=50,*p; system(&#8220;cls&#8221;); \/\/ printf(&#8220;Value is: %d&#8221;,a); \/\/ printf(&#8220;\\nAddress is: %u&#8221;,&amp;a); p=&amp;a; printf(&#8220;a=%d *p=%d &#8220;,a,*p); ++*p; ++a; printf(&#8220;a=%d *p=%d&#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],"class_list":["post-144576","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"],"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 - 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\/pointers-in-c\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pointers in C - DataFlair\" \/>\n<meta property=\"og:description\" content=\"Program 1 \/\/ Implementation of pointer and pointer to pointer #include&lt;stdio.h&gt; #include&lt;conio.h&gt; int main() { int a=50,*p; system(&quot;cls&quot;); \/\/ printf(&quot;Value is: %d&quot;,a); \/\/ printf(&quot;nAddress is: %u&quot;,&amp;a); p=&amp;a; printf(&quot;a=%d *p=%d &quot;,a,*p); ++*p; ++a; printf(&quot;a=%d *p=%d&#046;&#046;&#046;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/data-flair.training\/blogs\/pointers-in-c\/\" \/>\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=\"2025-03-17T11:16:48+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 - 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\/pointers-in-c\/","og_locale":"en_US","og_type":"article","og_title":"Pointers in C - DataFlair","og_description":"Program 1 \/\/ Implementation of pointer and pointer to pointer #include&lt;stdio.h&gt; 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