In function `main':: undefined reference to ...

[Graf László]

I did all what you said Sriharsha.
Whit file names changed, Makefile modified
I get the same message:

1. step:   rm *.o

2. step:   g++ -c base.cpp -o base.o

3. step:   g++ axf.cpp base.o -o axf.o

            /tmp/ccGshWGj.o(.text+0x4a): In function `main':
            : undefined reference to `Base::Base[in-charge]()'

            collect2: ld returned 1 exit status


Sriharsha wrote:
> Hi Laszlo,
>      firstly, I suggest that you change the extension of your code files 
> from .c to .cpp.
> 
> then, in your make file: Change:
> g++ axf.c -o axf.o
> to
> g++ axf.cpp base.o -o axf.o
> 
> Harsha.
> 
> Graf LĂĄszlĂł wrote:
> 
>> Hi Gurus,
>>
>> I am Laszlo from Hungary.
>> Please, take a look at these files:
>>
>> --- The main file 
>> ---------------------------------------------------------------------
>>     #include "stdio.h"
>>     #include "stdlib.h"
>>     #include "string.h"
>>     #include "base.h"
>>         int main(int argc, char* argv[])
>>     {
>>         system("clear");
>>         Base* b = new Base();
>>         printf("\n---------- %s ---------------\n", b->toString());
>>         delete b;
>>         return 0;
>>     }//main
>>
>> --- The base.h file 
>> ---------------------------------------------------------------------
>>     #ifndef __BASE
>>         #define __BASE
>>         class Base{
>>             private:
>>                 char* _str;
>>
>>             public:
>>                 Base();
>>                 Base(Base &);
>>                 ~Base();
>>
>>                 char* toString();
>>                 char* toHtml();
>>         };
>>     #endif
>>
>> --- The base.c file 
>> ---------------------------------------------------------------------
>>     #include "base.h"
>>     using namespace std;
>>
>>     Base::Base(Base &s){
>>     }
>>
>>     Base::~Base(){
>>     }
>>
>>     char* Base::toString()
>>     {
>>         char* rv = "this is the toString()";
>>         return rv;
>>     }
>>
>>     char* Base::toHtml()
>>     {
>>         char* rv = "this is the toHtml()";
>>         return rv;
>>     }
>>
>> --- The Makefile file 
>> ---------------------------------------------------------------------
>>     compile :
>>         g++ -c base.c -o base.o
>>         g++ axf.c -o axf.o
>>         clear :
>>         clear
>>            clean :
>>         rm *.o
>>         run :
>>         ./axf.o
>>
>> -------------------------------------------------------------------------------------------- 
>>
>> After the command
>>        make clear clean compile run
>>
>> I got these error messages:
>>
>>     rm *.o
>>     g++ -c base.c -o base.o
>>     g++ axf.c -o axf.o
>>
>>     /tmp/cc2K7HjB.o(.text+0x4a): In function `main':
>>     : undefined reference to `Base::Base[in-charge]()'
>>
>>     /tmp/cc2K7HjB.o(.text+0x88): In function `main':
>>     : undefined reference to `Base::toString()'
>>         /tmp/cc2K7HjB.o(.text+0xaf): In function `main':
>>     : undefined reference to `Base::~Base [in-charge]()'
>>     collect2: ld returned 1 exit status
>>
>>     make: *** [compile] Error 1
>>
>> Could somebody tell me what is wrong there?
>> Thank you.
> 
> 
> 

-- 
Graf LĂĄszlĂł - bitfaragĂł
http://grafl.port5.com/