{"id":263,"date":"2022-08-30T14:58:26","date_gmt":"2022-08-30T14:58:26","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2013\/08\/31\/problem-about-member-function-pointers-record-and-share-programming-errors\/"},"modified":"2022-08-30T14:58:26","modified_gmt":"2022-08-30T14:58:26","slug":"problem-about-member-function-pointers-record-and-share-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2022\/08\/30\/problem-about-member-function-pointers-record-and-share-programming-errors\/","title":{"rendered":"problem about member-function-pointers-Record and share programming errors"},"content":{"rendered":"<ul>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/8TYEd.jpg?s=32&amp;g=1\" \/><br \/>\nLOLKFC<br \/>\nc++ pointers dll member-function-pointers<br \/>\nI&#8217;d like to access to the member functions of my main class with a pointer, from a class in a lib.I have access to the variables public in my main class. But when I try to access to the member functions (public), I have this error : .\/Panda: symbol lookup error: libkoala.so: undefined symbol: _ZNK5Panda6getLOLEvI really don&#8217;t know why, maybe<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/e684cafe92bf95c6a3d02dccb02a0020?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nlaifjei<br \/>\nc++ member-function-pointers<br \/>\nI write some testing code, to figure out the address about member function. But the result confuse me. the code is#include #include #include class A { public:A(char _a, char _b, char _c, char _t):a(_a), b(_b), c(_c), t(_t){}private:char t<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/8dd3c804c3065052b42b278e085f3213?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nwk1989<br \/>\nc++ function-pointers member-function-pointers dll-injection<br \/>\nin C++, I can easily create a function pointer by taking the address of a member function. However, is it possible to change the address of that local function? I.e. say I have funcA() and funcB() in the same class, defined differently. I&#8217;m looking to change the address of funcA() to that of funcB(), such that at run time calling funcA() actually results in a call to funcB(). I know this is ugly, but I need to do this, thanks!EDIT-<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/ux55V.jpg?s=32&amp;g=1\" \/><br \/>\nslashmais<br \/>\nc++ member-function-pointers phantom-reference<br \/>\nI&#8217;ve been messing about with member-function pointers in relation to a previous question. In the code below I call methods on a class (B) that change a variable (count) in it, but I never make an instance of this class. Why does this work?#include #include #include class A; typedef int (A::*MEMFUNC)(int, int);#define<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/34a08f16b54a72bf2f54cae569a94835?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nGeorg Fritzsche<\/li>\n<\/ul>\n<p id=\"rop\"><small>Originally posted 2013-08-31 07:20:02. <\/small><\/p>","protected":false},"excerpt":{"rendered":"<p>LOLKFC c++ pointers dll member-function-pointers I&#8217;d like to access to the member functions of my main class with a pointer, from a class in a lib.I have access to the variables public in my main class. But when I try to access to the member functions (public), I have this error : .\/Panda: symbol lookup [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-263","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/263","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=263"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/263\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=263"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=263"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=263"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}