{"id":1017,"date":"2022-08-30T15:11:00","date_gmt":"2022-08-30T15:11:00","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2013\/11\/09\/sprintf-covert-int-to-char-collection-of-common-programming-errors\/"},"modified":"2022-08-30T15:11:00","modified_gmt":"2022-08-30T15:11:00","slug":"sprintf-covert-int-to-char-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2022\/08\/30\/sprintf-covert-int-to-char-collection-of-common-programming-errors\/","title":{"rendered":"sprintf (covert int to char[])-Collection of common programming errors"},"content":{"rendered":"<p>In my program I try to convert a int to a char[20];<\/p>\n<p>I try to do this in the following way:<\/p>\n<pre><code>  char str[20];    \n  sprintf(str, \"%d\", timer);\n<\/code><\/pre>\n<p>in which timer is the int.<\/p>\n<p>But when i build this code, i get the following warnings&#8230;<\/p>\n<pre><code>Type implicit declaration of function 'sprintf' [-Wimplicit-function-declaration]   \nincompatible implicit declaration of built-in function 'sprintf' [enabled by default]   \n<\/code><\/pre>\n<p>what does that mean?<\/p>\n<p>note:( i have included string.h and stdlib.h).<\/p>\n<p>great, i added stdio.h to my code and now the warnings dissapeard only to give me a even harder error. Any suggestions?<\/p>\n<p>undefined reference to `_sbrk&#8217;<\/p>\n<ol>\n<li>\n<p>You have to <code>#include<\/code> to use <code>sprintf()<\/code><\/p>\n<\/li>\n<li>\n<p>you want to make sure you also add reference to<\/p>\n<pre><code>stdio.h<\/code><\/pre>\n<p>see this ref<\/li>\n<li>\n<p>You probably need to put <code>sprintf(str, \"%d\", timer)<\/code> inside a function (not on the global part of the source code).<\/p>\n<p>Something like:<\/p>\n<pre><code>#include \nchar str[20];\n\/\/ SPOT #1\nint f() {\n    sprintf(str, \"%d\", timer); \/\/ this won't work if placed on SPOT #1\n}\n<\/code><\/pre>\n<\/li>\n<\/ol>\n<p id=\"rop\"><small>Originally posted 2013-11-09 23:14:02. <\/small><\/p>","protected":false},"excerpt":{"rendered":"<p>In my program I try to convert a int to a char[20]; I try to do this in the following way: char str[20]; sprintf(str, &#8220;%d&#8221;, timer); in which timer is the int. But when i build this code, i get the following warnings&#8230; Type implicit declaration of function &#8216;sprintf&#8217; [-Wimplicit-function-declaration] incompatible implicit declaration of built-in [&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-1017","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/1017","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=1017"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/1017\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=1017"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=1017"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=1017"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}