{"id":146572,"date":"2025-08-08T11:54:02","date_gmt":"2025-08-08T06:24:02","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=146572"},"modified":"2025-08-08T11:54:02","modified_gmt":"2025-08-08T06:24:02","slug":"cpp-pointers","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/cpp-pointers\/","title":{"rendered":"C++ Pointers"},"content":{"rendered":"

Program 1<\/h3>\n
\/*\r\n    Pointers are variable which hold address of another variable.\r\n    its also called reference variable in cpp\r\n*\/\r\n\/\/ Pointers in CPP\r\n#include<iostream>\r\nusing namespace std;\r\nint main()\r\n{\r\n    system(\"cls\");\r\n     int a=10,b=5,*p,*r;\r\n     p=&a; \r\n     r=&b;\r\n     ++*p; \r\n     --*r;\r\n     r=&a;\r\n     ++*p;\r\n     ++*r;\r\n     ++a;\r\n     ++b;\r\n     cout<<endl<<\"a=\"<<a;\r\n     cout<<endl<<\"b=\"<<b;\r\n     cout<<endl<<\"*p=\"<<*p;\r\n     cout<<endl<<\"*r=\"<<*r;\r\n     \r\n\r\n\r\n\r\n    return 0;\r\n}\r\n\r\n\r\n\r\n\r\n\r\n\/\/ int a=500,*p;\r\n    \/\/ cout<<\"value-:\"<<a;\r\n    \/\/ cout<<endl<<\"Address:-\"<<&a;\r\n    \/\/ p=&a;\r\n    \/\/ cout<<endl<<\"value-:\"<<*p;\r\n    \/\/ cout<<endl<<\"Address:-\"<<p;\r\n    \/\/ ++*p;\r\n    \/\/ a=a-10;\r\n    \/\/ cout<<endl<<*p;<\/pre>\n
Program 2<\/h3>\n
\/\/ Pointers in CPP\r\n#include<iostream>\r\nusing namespace std;\r\nint main()\r\n{\r\n    system(\"cls\");\r\n     int *i;\r\n    char *c;\r\n    float *f;\r\n    double *d;\r\n    cout<<sizeof(i)<<endl;  \/\/4\r\n    cout<<sizeof(c)<<endl;  \/\/4\r\n    cout<<sizeof(f)<<endl;  \/\/4\r\n    cout<<sizeof(d)<<endl;  \/\/4\r\ncout<<\"---------------------------\"<<endl;\r\n    cout<<sizeof(*i)<<endl;   \/\/4\r\n    cout<<sizeof(*c)<<endl; \/\/1\r\n    cout<<sizeof(*f)<<endl;  \/\/4\r\n    cout<<sizeof(*d)<<endl;  \/\/4\r\n\r\n\r\n\r\n    return 0;\r\n}<\/pre>\n
Program 3<\/h3>\n
\/\/ Pointers in CPP\r\n#include<iostream>\r\nusing namespace std;\r\nusing namespace std;\r\nint main()\r\n{\r\n    system(\"cls\");\r\n    int a=10,*p,**r;\r\n    p=&a;\r\n    r=&p;\r\n    cout<<endl<<\"a=\"<<a;   \/\/10 \r\n    cout<<endl<<\"p=\"<<p;  \/\/address of a\r\n    cout<<endl<<\"*p=\"<<*p;  \/\/10\r\n    cout<<endl<<\"r=\"<<r;   \/\/address of p\r\n    cout<<endl<<\"*r=\"<<*r; \/\/address of a\r\n    cout<<endl<<\"**r=\"<<**r; \/\/ value of a\r\n     ++**r;\r\n     cout<<endl<<\"a=\"<<a;   \/\/10 \r\nreturn 0;\r\n\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
Program 1 \/* Pointers are variable which hold address of another variable. its also called reference variable in cpp *\/ \/\/ Pointers in CPP #include<iostream> using namespace std; int main() { system(“cls”); int a=10,b=5,*p,*r;...<\/p>\n","protected":false},"author":581,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20172],"tags":[33870,28585,2263,20266,29219,29218,33871,23960],"class_list":["post-146572","post","type-post","status-publish","format-standard","hentry","category-cpp","tag-c-program-on-pointers","tag-c-tutorial","tag-c","tag-c-pointers","tag-c-practical","tag-c-program","tag-pointers","tag-pointers-in-c"],"yoast_head":"\nC++ Pointers - 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\/cpp-pointers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C++ Pointers - DataFlair\" \/>\n<meta property=\"og:description\" content=\"Program 1 \/* Pointers are variable which hold address of another variable. its also called reference variable in cpp *\/ \/\/ Pointers in CPP #include<iostream> using namespace std; 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