vc++ errors

[Jaideep Pinglikar]

Hi, I am able to compile but now iam getting this 
error...

would appreciate inputs,

Linking...

ex1.obj : error LNK2001: unresolved external 
symbol "public: virtual __thiscall 
GA2DBinaryStringGenome::~GA2DBinaryStringGenome(void)" 
(??1GA2DBinaryStringGenome@@UAE at XZ)
ex1.obj : error LNK2001: unresolved external 
symbol "public: virtual __thiscall 
GASimpleGA::~GASimpleGA(void)" (??1GASimpleGA@@UAE at XZ)
ex1.obj : error LNK2001: unresolved external 
symbol "public: class GAGenome const & __thiscall 
GAStatistics::bestIndividual(unsigned int)const " (?
bestIndividual at GAStatistics@@QBEABVGAGenome@@I at Z)
ex1.obj : error LNK2001: unresolved external 
symbol "public: virtual int __thiscall 
GASimpleGA::populationSize(unsigned int)" (?
populationSize at GASimpleGA@@UAEHI at Z)
ex1.obj : error LNK2001: unresolved external 
symbol "public: __thiscall GASimpleGA::GASimpleGA(class 
GAGenome const &)" (??0GASimpleGA@@QAE at ABVGAGenome@@@Z)
ex1.obj : error LNK2001: unresolved external 
symbol "public: __thiscall 
GA2DBinaryStringGenome::GA2DBinaryStringGenome(unsigned 
int,unsigned int,float (__cdecl*)(class GAGenome 
&),void *)" (??
0GA2DBinaryStringGenome@@QAE at IIP6AMAAVGAGenome@@@ZPAX at Z)
ex1.obj : error LNK2001: unresolved external 
symbol "void __cdecl GARandomSeed(unsigned int)" (?
GARandomSeed@@YAXI at Z)
ex1.obj : error LNK2001: unresolved external 
symbol "public: void __thiscall 
GAStatistics::flushScores(void)" (?
flushScores at GAStatistics@@QAEXXZ)
ex1.obj : error LNK2001: unresolved external 
symbol "public: int __thiscall GAParameterList::set
(char const *,void const *)" (?
set at GAParameterList@@QAEHPBDPBX at Z)
ex1.obj : error LNK2001: unresolved external 
symbol "public: int __thiscall GAParameterList::set
(char const *,double)" (?
set at GAParameterList@@QAEHPBDN at Z)
Debug/ex1.exe : fatal error LNK1120: 10 unresolved 
externals
Error executing link.exe.

ex1.exe - 11 error(s), 0 warning(s)