Dev-C++ compiler problem

GrasshopperEsq · 05-01-2008, 10:27 AM

Dear all

I am currently using:

Windown XP 2002 Pro with Service Pack 2
Dev-C++ Version 4.9.9.2

I am new to programming and I am learning from a book call "C++ All-in-one Desk reference for dummies" by Jeff Cogswell. I tried to use the code provided to see how the language works. The book uses version 4.9.9.0. I loaded the code which is all in the same project, and i have some compiler error that i do not understand. Please help! The code and error messages are displayed below

Code:


#include <iostream>
#include <stdlib.h>

using namespace std;

int main(int argc, char *argv[])
{
  int NumberOfPotholes = 532587;
  NumberOfPotholes = 6087;
  int *ptr;
  ptr = &NumberOfPotholes;
  *ptr = 6087;
  cout << NumberOfPotholes << endl;
  cout << &NumberOfPotholes << endl;
  cout << ptr << endl;
  system("PAUSE");	
  return 0;
}

Error Message
cannot find -lobjc
ld returned 1 exit status
[Build Error] [Pointer1.exe] Error 1

Any help is much appreaciated, I am getting a bit frustrated with programming, so if anyone knows any smarter way to learn C++, that will be great too.

Regards

Grasshopper Esq.

swgh · 05-01-2008, 10:32 AM

Erm the version of Dev the book comes with is very old. And that program is quite advanced for a starting point.

I advise getting Visual C++ 2008 Express which is free download from Microsoft website.

-lobjc looks like an "object" or part of the run exe file that it cannot locate. I would almost certainly consider getting a better IDE/compiler for later use, as Dev is ok but its badly bugged

GrasshopperEsq · 05-01-2008, 10:38 AM

Thank you for the reply, may i ask is there much difference between using Visual C++ 2008 and using Dev-C++? I had a quick look around the web, it seem to be a problem with the compiler according to some forum. I have only just pick the language up from yesterday, so i am still quite new and not very experience. Thank you again

swgh · 05-01-2008, 10:43 AM

Visual C++ is much larger than Dev as an IDE. It has lots of features that Dev doesnt have, but as you are just starting out, then that isnt a problem, as most of it you would never use untill you were quite experienced in the language syntax.

I would also reomend you starting with a much simpler program, somthing like:

Code:

#include <iostream>

int main()
{
   std::cout << "Hello World!\n";

   std::cin.get();

   return 0;
}

If you can get that to work and compile, your away. And also system("pause"); is a terrible way for a book to be teaching you to hold the console open. Use cin.get() as I did above, it is much more portable and compliant.

GrasshopperEsq · 05-01-2008, 11:02 AM

Thank you so much I will try to download the Visual C++, do you know any good resource for learning this program?

guesst · 05-01-2008, 11:04 AM

Don't listen to him. Dev C++ should have been able to compile that program fine. I would recommend, however, uninstalling it and downloading the latests version from blodshed.

Of course, you could always install code::Blocks if you want something that's a bit more up to date.

swgh · 05-01-2008, 11:18 AM

Thats rather rude.

I was only offering advice which I am fully entitled to do on a forum, whether the OP chooses to take the advice is up to them.

GrasshopperEsq · 05-01-2008, 12:00 PM

I appreciated all the help, where can i install code::blocks?

GrasshopperEsq · 05-01-2008, 03:13 PM

Thank you both for your help, I have tried and retyped the code, and it seems to work, i wonder if there is anything to do with the end of line character between different system. any ideas?

cyberfish · 05-01-2008, 04:20 PM

if you are doing everything on the same platform (coding and compiling), it shouldn't be the problem. I even occassionally code on Linux and compile and Windows and vice versa and there doesn't seem to be any problems either. I am assuming compilers (parsers) are smart enough to figure it out.

BTW, I second Code::Blocks (google will tell you where to download). Since your book uses Dev-C++, which uses GCC as its compiler, it will probably be a good idea (at least when you are starting off) to stick with an IDE that also uses GCC (such as Code::Blocks, and not VC++, which uses Microsoft's own compiler).

cyberfish · 05-01-2008, 04:21 PM

although theoretically, as long as you write standard C++, any compiler will work, practically, every compiler has its own quirks.

GrasshopperEsq · 05-02-2008, 04:19 AM

Well, the funny thing is, when i actually type the code in instead of cut and paste, it works! Now i am even more confuse. but i will give code::blocks a try! thanks mate

swgh · 05-02-2008, 04:35 AM

You will learn a great deal more by typing the code in yourself rather than copy/paste too.

This is a good ideal to cling to for later learning practices. When you learn somthing new, you type it as it says in a book and may think "I wonder how this works..." as you type it. It then encourages you to dive deeper into how certain aspects and algorithms of the language work.

master5001 · 05-02-2008, 04:44 AM

Though I am not quite compelled to jump on the Microsoft bandwagen, I would like to point out that Dev-C++ is seriously out of date. And to answer the original question (which no one has even bothered to take the time to do as of yet). You are actually dealing with a known issue with the MinGW compiler on Windoze Vi$ta. What you need to do is edit your path to include the folders which contain gcc (and mingw32-gcc) as well as c1, and ld. Using the crappy vista search tool will likely not find any of these files since m$ has a very buggy file indexing system in all of its current OSes. You are looking for folders something like C:\MinGW\bin and C:\MinGW\libexec\gcc\mingw32\3.4.5 (or whatever version... this is what mine is set to atm anyway).

Good luck.

slimdime · 05-02-2008, 04:54 PM

I'm taking a C++ class and they recommend Dev C++ for beginners because it's easier to use than Visual C++ and more user friendly.

05-01-2008, 10:27 AM	#1
GrasshopperEsq Registered User Join Date: May 2008 Posts: 16	Dev-C++ compiler problem Dear all I am currently using: Windown XP 2002 Pro with Service Pack 2 Dev-C++ Version 4.9.9.2 I am new to programming and I am learning from a book call "C++ All-in-one Desk reference for dummies" by Jeff Cogswell. I tried to use the code provided to see how the language works. The book uses version 4.9.9.0. I loaded the code which is all in the same project, and i have some compiler error that i do not understand. Please help! The code and error messages are displayed below Code: #include <iostream> #include <stdlib.h> using namespace std; int main(int argc, char argv[]) { int NumberOfPotholes = 532587; NumberOfPotholes = 6087; int ptr; ptr = &NumberOfPotholes; ptr = 6087; cout << NumberOfPotholes << endl; cout << &NumberOfPotholes << endl; cout << ptr << endl; system("PAUSE"); return 0; } Error Message* cannot find -lobjc ld returned 1 exit status [Build Error] [Pointer1.exe] Error 1 Any help is much appreaciated, I am getting a bit frustrated with programming, so if anyone knows any smarter way to learn C++, that will be great too. Regards Grasshopper Esq.
GrasshopperEsq is offline

05-01-2008, 10:32 AM	#2
swgh Its hard... But im here Join Date: Apr 2005 Location: England Posts: 1,466	Erm the version of Dev the book comes with is very old. And that program is quite advanced for a starting point. I advise getting Visual C++ 2008 Express which is free download from Microsoft website. -lobjc looks like an "object" or part of the run exe file that it cannot locate. I would almost certainly consider getting a better IDE/compiler for later use, as Dev is ok but its badly bugged __________________ I'm just trying to be a better person - My Name Is Earl
swgh is offline

05-01-2008, 10:38 AM	#3
GrasshopperEsq Registered User Join Date: May 2008 Posts: 16	Thank you for the reply, may i ask is there much difference between using Visual C++ 2008 and using Dev-C++? I had a quick look around the web, it seem to be a problem with the compiler according to some forum. I have only just pick the language up from yesterday, so i am still quite new and not very experience. Thank you again
GrasshopperEsq is offline

05-01-2008, 10:43 AM	#4
swgh Its hard... But im here Join Date: Apr 2005 Location: England Posts: 1,466	Visual C++ is much larger than Dev as an IDE. It has lots of features that Dev doesnt have, but as you are just starting out, then that isnt a problem, as most of it you would never use untill you were quite experienced in the language syntax. I would also reomend you starting with a much simpler program, somthing like: Code: #include <iostream> int main() { std::cout << "Hello World!\n"; std::cin.get(); return 0; } If you can get that to work and compile, your away. And also system("pause"); is a terrible way for a book to be teaching you to hold the console open. Use cin.get() as I did above, it is much more portable and compliant. __________________ I'm just trying to be a better person - My Name Is Earl
swgh is offline

05-01-2008, 11:02 AM	#5
GrasshopperEsq Registered User Join Date: May 2008 Posts: 16	Thank you so much I will try to download the Visual C++, do you know any good resource for learning this program?
GrasshopperEsq is offline

05-01-2008, 11:04 AM	#6
guesst Registered User Join Date: Feb 2008 Location: Lehi, UT Posts: 179	Don't listen to him. Dev C++ should have been able to compile that program fine. I would recommend, however, uninstalling it and downloading the latests version from blodshed. Of course, you could always install code::Blocks if you want something that's a bit more up to date. __________________ Type-ins are back! Visit Cymon's Games at http://www.cymonsgames.com for a new game every week!
guesst is offline

05-01-2008, 11:18 AM	#7
swgh Its hard... But im here Join Date: Apr 2005 Location: England Posts: 1,466	Thats rather rude. I was only offering advice which I am fully entitled to do on a forum, whether the OP chooses to take the advice is up to them. __________________ I'm just trying to be a better person - My Name Is Earl
swgh is offline

05-01-2008, 12:00 PM	#8
GrasshopperEsq Registered User Join Date: May 2008 Posts: 16	I appreciated all the help, where can i install code::blocks?
GrasshopperEsq is offline

05-01-2008, 03:13 PM	#9
GrasshopperEsq Registered User Join Date: May 2008 Posts: 16	Thank you both for your help, I have tried and retyped the code, and it seems to work, i wonder if there is anything to do with the end of line character between different system. any ideas?
GrasshopperEsq is offline

05-01-2008, 04:20 PM	#10
cyberfish Registered User Join Date: Dec 2006 Posts: 1,780	if you are doing everything on the same platform (coding and compiling), it shouldn't be the problem. I even occassionally code on Linux and compile and Windows and vice versa and there doesn't seem to be any problems either. I am assuming compilers (parsers) are smart enough to figure it out. BTW, I second Code::Blocks (google will tell you where to download). Since your book uses Dev-C++, which uses GCC as its compiler, it will probably be a good idea (at least when you are starting off) to stick with an IDE that also uses GCC (such as Code::Blocks, and not VC++, which uses Microsoft's own compiler).
cyberfish is offline

05-01-2008, 04:21 PM	#11
cyberfish Registered User Join Date: Dec 2006 Posts: 1,780	although theoretically, as long as you write standard C++, any compiler will work, practically, every compiler has its own quirks.
cyberfish is offline

05-02-2008, 04:19 AM	#12
GrasshopperEsq Registered User Join Date: May 2008 Posts: 16	Well, the funny thing is, when i actually type the code in instead of cut and paste, it works! Now i am even more confuse. but i will give code::blocks a try! thanks mate
GrasshopperEsq is offline

05-02-2008, 04:35 AM	#13
swgh Its hard... But im here Join Date: Apr 2005 Location: England Posts: 1,466	You will learn a great deal more by typing the code in yourself rather than copy/paste too. This is a good ideal to cling to for later learning practices. When you learn somthing new, you type it as it says in a book and may think "I wonder how this works..." as you type it. It then encourages you to dive deeper into how certain aspects and algorithms of the language work. __________________ I'm just trying to be a better person - My Name Is Earl
swgh is offline

05-02-2008, 04:44 AM	#14
master5001 Banned Join Date: Aug 2001 Location: Visalia, CA, USA Posts: 3,699	Though I am not quite compelled to jump on the Microsoft bandwagen, I would like to point out that Dev-C++ is seriously out of date. And to answer the original question (which no one has even bothered to take the time to do as of yet). You are actually dealing with a known issue with the MinGW compiler on Windoze Vi$ta. What you need to do is edit your path to include the folders which contain gcc (and mingw32-gcc) as well as c1, and ld. Using the crappy vista search tool will likely not find any of these files since m$ has a very buggy file indexing system in all of its current OSes. You are looking for folders something like C:\MinGW\bin and C:\MinGW\libexec\gcc\mingw32\3.4.5 (or whatever version... this is what mine is set to atm anyway). Good luck.
master5001 is offline

05-02-2008, 04:54 PM	#15
slimdime Registered User Join Date: May 2008 Posts: 21	I'm taking a C++ class and they recommend Dev C++ for beginners because it's easier to use than Visual C++ and more user friendly. Last edited by slimdime; 05-03-2008 at 09:11 AM.
slimdime is offline

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