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its time that i got the hang of header and sourcefiles, only my code doesnt work, can you help?

devonrevenge (2435)
Got to get out of that beginner habit i havny bothered in ages and more advanced tutorials are beginning to get indecipherable, i have a few questions, the first is should main always be called main? loads of my practice codes would wind up being called main, do i have to put them in their own folders and deal with it or can i call main anything? just worked out its fine so long as i include the header as i was typing, forget that, the other question is; is that the point of a project i can just go ahead and include different functions i have made before so soon enough all i have to do to make something is link stuff together? that sounds ace, should i start building up a project and lots of source and header files, is there a tut out there for this? if no its good advice for a fresh and bold beginner.

oh yeah and the function body in main, that could go in the source file, do i put the whole thing in there, wait how do i call it? i know why i got an error, its because i de=idnt use the scope resolution in main, is that it??


Kay, So the two errors i get are undefined referene to undefined reference to bunny::setname (std::string)the program spits out randomly created names.

and undefined reference to bunny::setname

heres the main.cpp

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#include <iostream>
#include<string>
#include<ctime>
#include<cstdlib>
#include "bunny namegenerator.h"
using namespace std;

main()
{
srand(time(0));
bunny bun1;
bun1.setname (namelist());
cout << bun1.getname()<<endl;
}


int getrand ()
{


return 1+(rand()%6);

}

string namelist ()
{
string namearray [18] = {"frufru ","baxter ","voldermort ","falafal ",
"fluffles "," flopsy "," panhandle ",
" bruchetta "," cottonflop "," serious ",
" bouviay "," lightening "," cellotape "," bonapart "," jackson "," gatsby "," junior "," the first "};

string none = namearray [getrand()%18];
string ntwo =namearray [getrand()*4%18];
string nthree=namearray [getrand()*7%18];
string fullname=none+ntwo+nthree;
return fullname;
}


here is bunny namegenerator.h

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#include <iostream>
#include<string>
#include<ctime>
#include<cstdlib>


class bunny{
public:
void setname (std::string x);

std::string getname();

private:
std::string name;
};


std::string namelist ();

int getrand ();


and heres bunny namegenorator.cpp

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#include "bunny namegenerator.h"


void bunny::setname (string x)
{
    name = x;
}
string bunny::getname()
{
    return name;
}
Last edited on
devonrevenge (2435)
now ive changed a few bits and pieces but why are get and set undefined??
Moschops (7244)
undefined means the linker cannot find the compiled object file containing it. The questions you ask yourself are:

1) Did I write the functions correctly? Correct name, correct parameters.
2) Did I compile the code containing the function definitions?
3) Did I tell the linker to link against it?
devonrevenge (2435)
how do linkers work?

mine keeps saying it cant find SDL_main what do i tell it instead?
Moschops (7244)
You tell it the name and location of the library containing that function.
devonrevenge (2435)
erm
Moschops (7244)
You're using some kind of program to build your code. Maybe some kind of IDE? It has settings.
devonrevenge (2435)
yeah i managed to install sdl, im using codeblocks theres libraries in mingw? do i just add another address to somewhere else, is there someway i can avoiddeleting old linker options
devonrevenge (2435)
what do i write in what linker section i know nothing
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