Main Error
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Undefined Reference To Main In Function _start
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Undefined Reference To Main G++
-2 down vote favorite When trying to compile my program I get the error icpc -c main.cpp main.cpp(4): error: expected a "{" int main() ^ main.cpp(55): error: return value type does not match the function type return 0; ^ It seems to not be recognizing my main function as the main function. Here is the main function code, Makefile, and header: main.cpp #include
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Undefined Reference To Main Makefile
Overflow the company Business Learn more about hiring developers or posting ads with us in function start undefined reference to main Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community (.text+0x18): undefined reference to `main' of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up C++ | main function error | beginners up vote 0 down vote favorite I'm totally new http://stackoverflow.com/questions/20367236/compiler-error-expected-a-before-int-main with c++ and I'm using eclipse. but... I don't know why I get this error at the main function: ERROR: ::main must return int My code is: void main() { char a; while (a!='q') { string ln = "enter option: "; cout<< ln; switch(a) { case 1: if (a=='1') func1(); break; case 2: if (a=='2') break; break; } } } c++ main share|improve this question edited Mar 11 '12 at 11:44 Cody http://stackoverflow.com/questions/9654601/c-main-function-error-beginners Gray 146k23279370 asked Mar 11 '12 at 11:43 Bogdan Maier 3151818 add a comment| 4 Answers 4 active oldest votes up vote 4 down vote accepted Because in C++, the main function must have a return type of int. Your version with a return type of void is incorrect and is being correctly rejected by your compiler. Just change the declaration from void main() to int main() There is an alternative form that allows you to process arguments passed on the command line to your program. It looks like this: int main (int argc, char *argv[]) but when you're just learning C++ and trying to print "hello world" on the screen, this is probably not something you need to worry about. You'll get there eventually. And consider updating the book you're using to learn C++, too. If it's getting the function signature of the entry point wrong, what other more complicated things might it also be getting wrong?! No point in learning the language wrong the first time around. A list of suggested books is available here. share|improve this answer answered Mar 11 '12 at 11:45 Cody Gray 146k23279370 Wait a second, you min Main cant be a void type function? im pretty sure ive seen void main() before &nd
Things LocationTech Long-Term Support PolarSys Science OpenMDM More Community Marketplace Events Planet Eclipse Newsletter Videos Participate Report a Bug Forums Mailing Lists Wiki IRC How to Contribute Working Groups Automotive Internet https://www.eclipse.org/forums/index.php/t/279366/ of Things LocationTech Long-Term Support PolarSys Science OpenMDM Toggle navigation Home Projects https://discuss.leetcode.com/topic/21553/this-program-is-giving-me-redefinition-of-int-main-error-but-working-corrrectly-on-my-system-how-to-fix-it Forums Eclipse Community Forums Forum Search: Search Help Register Login Home Home» Language IDEs» C / C++ IDE (CDT)» make: *** [main] Error 1 Show: Today's Messages :: Show Polls :: Message Navigator make: *** [main] Error 1 [message #783606] Thu, 26 January 2012 04:00 Jamie undefined reference GardinerMessages: 4Registered: January 2012 Junior Member hey, Does any one know what this means make: ***[main] Error 1? I have been trying to fix this issue over the last 2-3 days but I am unable to make any progress. I only have one ccp file in the program, but I am still unable to fix the issue. Very frustrating. Attachment: main.cpp (Size: 2.39KB, undefined reference to Downloaded 389 times) Report message to a moderator Re: make: *** [main] Error 1 [message #783676 is a reply to message #783606] Thu, 26 January 2012 08:02 Jamie GardinerMessages: 4Registered: January 2012 Junior Member The error message is actually Undefined symbols:"_main", referenced from: start in crt1.10.6.old: symbol(s) not found. I am still at odds Report message to a moderator Re: make: *** [main] Error 1 [message #783700 is a reply to message #783676] Thu, 26 January 2012 08:54 HagenMessages: 90Registered: April 2010 Member On 1/26/2012 9:02 AM, Jamie Gardiner wrote: > The error message is actually Undefined symbols:"_main", referenced > from: start in crt1.10.6.old: symbol(s) not found. I am still at odds The C runtime needs to link to a function "main". But you don't hae one if you use a CPP file. C++ does make "name mangling" to allow several functions with the same name differing only in return and parameter types. Look up the explanation for the extern "C" { ... } Syntax construct and apply it to the "main" function. ....or just rename your *.cpp file to
browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript). Home OJ Add Two Numbers This program is giving me redefinition of int main() error. But working corrrectly on my system. How to fix it? This program is giving me redefinition of int main() error. But working corrrectly on my system. How to fix it? browsing This topic has been deleted. Only users with topic management privileges can see it. 0 S shipee Reputation: 0 #include