Gcc Error Undeclared

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Each Undeclared Identifier Is Reported Only Once For Each Function It Appears In

contents next >>> 13.2 Compiler error messages `variable' undeclared (first use in this function) In C and struct undeclared (first use in this function) C++ variables must be declared before they can be used. This error message indicates that the compiler has encountered a variable name which does not have a corresponding declaration. It can be caused by a missing declaration, or a typing error in the name. Variable names are case-sensitive, so foo and Foo represent different variables. To keep the output short, only the first use of an undeclared variable is reported. Example: int main (void) { int i; j = 0; /* undeclared */ return j; } The variable j is not declared and will trigger the error `j' undeclared. parse error before `...' syntax error These error messages occur when the compiler encounters unexpected input, i.e. sequences of characters which do not follow the syntax of the language. The error messages can be triggered by a missing close bracket, brace or semicolon preceding the line of the error, or an invalid keyword. Example: #include int main (void) { printf ("Hello ") /* missing semicolon */ printf ("World!\n"); return 0; } There is a missing semicolon after the first call to printf, giving a parse error. parse error at end of input This error occurs if the compiler encounters the end of a file unexpectedly, such as when it has parsed an unbalanced number of opening and closing braces. It is often caused by a missing closing brace somewhere. Example: #include int main (void) { if (1) { printf ("Hello World!\n"); return 0; /* no closing brace */ } An additional closing brace is needed in this program to prevent the error pars

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Compiled C program with call to undefined/undeclared function; no error or warning reported. Why? up vote 2 down vote favorite http://www.linuxtopia.org/online_books/an_introduction_to_gcc/gccintro_94.html I'm copying an example from Kernighan & Ritchie's "C Programming Language (2nd Edition)". Just to make sure I had copied the code correctly (and to test its functionality), I compiled this code: /*This is an example program from chapter 5, section 6 (Pointer Arrays; Pointers to Pointers)*/ #include #include #include "/home/alecto/Compsci/Cprogramming/Utils/get_line.c" #include "/home/alecto/Compsci/Cprogramming/Kernighan_Ritchie_5/alloc.c" #define MAXLINES 5000 /*max number of lines to be sorted*/ char *lineptr[MAXLINES]; /*pointers to lines of text*/ int http://stackoverflow.com/questions/28033335/compiled-c-program-with-call-to-undefined-undeclared-function-no-error-or-warni readlines(char *lineptr[], int nlines); void writelines(char *lineptr[], int nlines); void qsort(char *lineptr[], int left, int right); /* sort input lines */ main() { int nlines; /* number of input lines read */ if ((nlines = readlines(lineptr, MAXLINES)) >= 0) { qsort(lineptr, 0, nlines-1); writelines(lineptr, nlines); return 0; } else { printf("error: input too big for sort\n"); return 1; } } ... //readlines() and writelines() are defined in my source file, but not ... //qsort() The program compiles with no complaints from gcc or the linker, despite the lack of a definition for qsort() in the source file. I tried commenting out the declaration void qsort(char *lineptr[], int left, int right); while leaving the call to qsort() active in main() just to see if I could induce an error, but the program still manages to compile and run silently, without complaint or unexpected behaviour What's going on here? c gcc share|improve this question asked Jan 19 '15 at 20:57 OhNo_Segfault 285 How would we distinguish the observed behaviour from the program working? –abligh Jan 19 '15 at 21:00 6 qsort()is part of the standard C library. –mfro Jan 19 '15 at 21:01 1 How do you compile? What compiler are you using, and which version? What flags are you passing to the compiler? –Joachim Pile

CommunitiesAVR FreaksAtmel SMART ARM-based MCUsInternet of ThingsCapacitive TouchProjectsVendorsWiki You are hereHome » Communities » AVR Freaks » Forums » Tools » Compilers and General Programming » error: undeclared here (not in a function) http://www.avrfreaks.net/forum/error-undeclared-here-not-function Main menu mobile Home Communities Forums Projects Vendors Wiki Search My summary Privacy Contact http://askubuntu.com/questions/272741/how-to-fix-compilation-errors-that-mention-stray-342-and-stray-200 Site Use Terms Cookies Communities Forums Projects Vendors WIKI error: undeclared here (not in a function) Log in or register to post comments Go To Last Post 8 posts / 0 new Author Message katte Level: Rookie Joined: Fri. Nov 23, 2007 Posts: 35 View posts #1 Posted by katte: Wed. Feb 25, 2009 - error undeclared 02:44 PM Fivestar widget 12345Total votes: 0 Hi all, I ask you a tip. I've this code. typedef struct menuitem{ char item[LCD_LINE_LENGTH + 1]; struct menuitem *next; void (*func)(); } menuItem; const menuItem mIcoll[4] EEMEM = { {"abc \0", NULL, NULL}, {"def \0", NULL, NULL}, {"ghi \0", NULL, NULL}, {"<-- prev. \0", mImain, NULL} }; const menuItem mIimp[4] EEMEM = { {"abc \0", NULL, NULL}, {"def \0", NULL, first use in NULL}, {"ghi \0", NULL, NULL}, {"<-- prev. \0", mImain, NULL} }; const menuItem mImain[6] EEMEM = { {"abc \0", NULL, NULL}, {"def \0", mIcoll, NULL}, {"ghi \0", mIimp, NULL} }; Obviously the compiler returns this error: error: 'mImain' undeclared here (not in a function) How can I fix this? for now I am doing something like this: const menuItem mIcoll[4] EEMEM = { .... {"<-- prev. \0", mIcoll, NULL} }; const menuItem mIimp[4] EEMEM = { .... {"<-- prev. \0", mIimp, NULL} }; const menuItem mImain[6] EEMEM = { .... {"def \0", mIcoll, NULL}, {"ghi \0", mIimp, NULL} }; and then in the code I will do the necessary controls.. Any better idea? Tags:Tools, Compilers and General Programming Log in / register to post comments Top sternst Level: Raving Lunatic Joined: Mon. Jul 23, 2001 Posts: 2728 View posts Location: Osnabrueck, Germany #2 Posted by sternst: Wed. Feb 25, 2009 - 02:54 PM 12345Total votes: 0 The compiler needs to know, that mImain is a function. So put a void mImain ( void ); in front of your current code. (or in a appropriate header file) Stefan Ernst Log in or register to post comments Top clawson Level: Moderator Joined: Mon. Jul 18, 20

communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Ask Ubuntu Questions Tags Users Badges Unanswered Ask Question _ Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top How to fix compilation errors that mention “stray ‘\342’” and “stray ‘\200’”? up vote 5 down vote favorite I wrote this program: #include int main() { printf(“Hello World\n”); return 0; } I saved it as first.c and tried to compile but receiving this problem I have installed even gcc compiler too. zahid@zahid-HP-Compaq-nc6400-EH522AV:~/programs$ gcc first.c -o first1 first.c: In function ‘main’: first.c:4:1: error: stray ‘\342’ in program first.c:4:1: error: stray ‘\200’ in program first.c:4:1: error: stray ‘\234’ in program first.c:4:11: error: ‘Hello’ undeclared (first use in this function) first.c:4:11: note: each undeclared identifier is reported only once for each function it appears in first.c:4:17: error: expected ‘)’ before ‘World’ first.c:4:17: error: stray ‘\’ in program first.c:4:17: error: stray ‘\342’ in program first.c:4:17: error: stray ‘\200’ in program first.c:4:17: error: stray ‘\235’ in program zahid@zahid-HP-Compaq-nc6400-EH522AV:~/programs$ How can I fix this problem? compiling gcc error-handling share|improve this question edited Mar 26 '13 at 18:13 Eliah Kagan 56.1k15162255 asked Mar 26 '13 at 17:56 Zahid 26112 Did you copy this program from some other word processor or document like Libre office or Microsoft Word? –i08in Mar 26 '13 at 18:02 if you have copied the code from somewhere then rewrite the code on your own as the code that you have copied may have some unwanted codes embedded in it. &n