Linking error when calling a function

When my code is calling a certain function, I'm getting an error:

H:\workspace\HW5\HW5\Manager.obj

Error 22 error LNK2019: unresolved external symbol "public: void __thiscall Shalishut::Task8_MoveVehicleFromBaseToBase(class Military *,char const *,char *,char *)" (?Task8_MoveVehicleFromBaseToBase@Shalishut@@QAEXPAVMilitary@@PBDPAD2@Z) referenced in function "public: void __thiscall Manager::TaskExecute(class Task *,class Military *,class Shalishut *,char * * const)" (?TaskExecute@Manager@@QAEXPAVTask@@PAVMilitary@@PAVShalishut@@QAPAD@Z) H:\workspace\HW5\HW5\Manager.objH:\workspace\HW5\HW5\Manager.obj

and:

error LNK1120: 1 unresolved externals H:\workspace\HW5\Debug\HW5.exe

开发者_如何转开发

When I'm not calling that function, everything is OK and the project builds.

Here is the code calling the function:

shalishut->Task8_MoveVehicleFromBaseToBase(military,licenseId,campNameA,campNameB);

and here is the function:

void Task8_MoveVehicleFromBaseToBase(Military* military,const char* licenseId,char* fromBase,char* toBase){
 if (military->IsBaseExist(fromBase)){
  if(military->FindBase(fromBase)->IsVehicleExist(licenseId)){
   if (military->IsBaseExist(toBase)){
    if(military->GetCountry()->IsRoadExist(military->FindBase(fromBase)->GetCityName(),military->FindBase(toBase)->GetCityName())){
     military->FindBase(toBase)->AddVehicleToBase( military->FindBase(fromBase)->RemoveVehicleFromBase(licenseId) );
     Time* time = Time::GetInstance();
     long double distance = military->GetCountry()->GetRoadDistance(military->FindBase(fromBase)->GetCityName(),military->FindBase(toBase)->GetCityName());
     Transport* transportToAdd = new Transport(time->GetTime(),(string)fromBase,(string)toBase,distance);
     military->FindVehicle(licenseId)->AddTransport(transportToAdd);
    }
   }
  }
 }
}

I believe the function declaration needs to be:

void Shalishut::Task8_MoveVehicleFromBaseToBase(Military* military,const char* licenseId,char* fromBase,char* toBase) {
...
}

You didn't really provide us with header files so I'm assuming that function is a member of the shalishut class.