Need Help on C++ Tutorial 15 and 42

0 Ehsanul Haque Kanan · March 23, 2015

I cannot run the programs of the 15th and the 42nd tutorial of Bucky's C++ tutorial series. I got an error: "cout was not declared in this scope." 

In fact, I cannot run any program which requires to place classes in separate files.

Please, help me. I am new to C++. I am totally stuck! :(

Thanks in advance.

Post a Reply


- page 2
Oldest  Newest  Rating
0 Ehsanul Haque Kanan · March 26, 2015
Hi everyone,

I have found a solution. Go to Settings>Compiler>Reset Defaults. Then click OK. Any program with classes in multiple files will run with perfection! 
0 Faha Sharapov · March 24, 2015
I got an error: "cout was not declared in this scope."   -->   are you adding using namespace std; above your int main ()   ?

"In fact, I cannot run any program which requires to place classes in separate files."   -->   if you are using codeblocks, go to Setting/Compiler/Build Options  and then check the Explicitly add currently compiling file's... You should be good then...
0 Ehsanul Haque Kanan · March 24, 2015
Hi Faha,

Thanks for your response. I was not using "using namespace std." That's why, the error was showing. But despite I include it, I still cannot run the program. Now a new error has appeared, stating "no such file or directory" in 2main.

I have also checked the " Explicitly add currently compiling file's" option. But still the program doesn't run.

Here are my codes:

Codes of main.cpp:

#include <iostream>
#include "Sally.h"
using namespace std;

int main()
    Sally sallyObject;


Codes of sally.h:

#ifndef SALLY_H
#define SALLY_H

class Sally
        void printCrap();

#endif // SALLY_H

Codes of sally.cpp:
#include "Sally.h"
#include <iostream>
using namespace std;



void Sally::printCrap()
cout<<"Did someone say steak"<<endl;


It would be highly appreciated if you help me to solve the issue. :)

Thanks in advance.
0 Brian Reed · March 24, 2015
Hi Ehsanul,

You're not alone! I too am having issues with this two tutorials.

I'm using Code Blocks 13.12, but the tutorial it was ver 10.something.

So, it must be something different we have to do or check for with this version. I skipped the first one, as I just wonted to move on. I think I'll do the same for this one too. However, at some point this will be a good thing to learn and when we figure out what went wrong here, we'll be the better for it.

On build and run I get these errors:

main.cpp biuld log
mingw32-g++.exe  -I"C:\Program Files (x86)" -IC:\Users\user\Desktop\C++ -c C:\Users\user\Desktop\C++\main.cpp -o C:\Users\user\Desktop\C++\main.o
mingw32-g++.exe  -o C:\Users\user\Desktop\C++\main.exe C:\Users\user\Desktop\C++\main.o   
C:\Users\user\Desktop\C++\main.o:main.cpp:(.text+0x4d): undefined reference to `Sally::Sally()'
C:\Users\user\Desktop\C++\main.o:main.cpp:(.text+0x58): undefined reference to `Sally::printCrap()'
collect2.exe: error: ld returned 1 exit status

main.cpp biulld message
C:\Users\user\Desktop\C++\main.o:main.cpp|| undefined reference to `Sally::Sally()'|
C:\Users\user\Desktop\C++\main.o:main.cpp|| undefined reference to `Sally::printCrap()'|

Sally.cpp biuld log (When run separately)
mingw32-g++.exe  -I"C:\Program Files (x86)" -IC:\Users\user\Desktop\C++ -c C:\Users\user\Desktop\C++\Sally.cpp -o C:\Users\user\Desktop\C++\Sally.o
mingw32-g++.exe  -o C:\Users\user\Desktop\C++\Sally.exe C:\Users\user\Desktop\C++\Sally.o   
C:\Users\user\Desktop\C++\Sally.o:Sally.cpp:(.text+0xf): undefined reference to `Sally::printCrap()'
c:/program files (x86)/codeblocks/mingw/bin/../lib/gcc/mingw32/4.7.1/../../../libmingw32.a(main.o):main.c:(.text.startup+0xa7): undefined reference to `WinMain@16'

Sally.cpp biuld message (When run separately)

| undefined reference to `Sally::printCrap()'|

c:\program files (x86)\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.7.1\..\..\..\libmingw32.a(main.o):main.c:(.text.startup+0xa7)|
|undefined reference to `WinMain@16'| <<-----I think this has something to do with my problem
0 Ehsanul Haque Kanan · March 24, 2015
Hi Brian,

Thanks for your response. I believe that we must get a solution to this issue before moving to the next tutorials, as there are so many lessons which require working with classes with multiple files. If we skip it, we will definitely fall into a huge trouble! :(

This issue happens not only on Code Blocks v13.12, but also on v10! 

I hope that someone will solve this issue very soon to help us proceeding further with Bucky's C++ tutorials. :)

Bucky, can you help us??
0 Faha Sharapov · March 24, 2015
Ehsanul Haque Kanan   -  will get back to you in few hours...

Brian Reed   -   go to Setting/Compiler/Build Options and then check the Explicitly add currently compiling file...  The error with WinMain@16  needs to be resolved then...
0 Dol Lod · March 24, 2015
I checked your code directly substituting things in and it worked perfectly on
  • 1
  • 2



Used in many types of software including music players, video games, and many large scale applications.

Bucky Roberts Administrator