C++: Undefined referense to class::function() - c++

Question

i been having a problem that i tried for many days to fix but i cant find a solution for it.
I keep getting this Error:
undefined reference to 'Simulator::Simulator(int, int)'
undefined reference to 'Simulator::run();'
undefined reference to 'Simulator::~Simulator()'
undefined reference to 'Simulator::~Simulator()'
I searched for an answer but nothing seems to be working for me.
Here are my classes:
main.cpp:
#include <iostream>
#include <cstdlib>
#include "Simulator.h"
int main(int argc, char** argv) {
//Some code
Simulator sim(rows, cols);
sim.run();
}
Simulator.h:
#include <iostream>
#include "PersonQueue.h"
#include "DogQueue.h"
class Simulator {
void drawBoard();
DogQueue _dq;
PersonQueue _pq;
public:
int dog_num, person_num;//Number of entitys
int _rows, _cols;//Should be static but wont work.
void fill_queue();//check
void init_clrs();
Simulator(int rows, int cols);//check
void run();//check
~Simulator();
};
Simulator.cpp:
#ifndef SIM_C
#define SIM_C
#include <iostream>
#include <curses.h>
#include "Simulator.h"
int Simulator:: _rows;
int Simulator:: _cols;
Simulator::Simulator(int row, int col) {
_rows = row;
_cols = col;
dog_num = 2; //number of dog entitys
person_num = 2;//number of person entitys
}
void Simulator::init_clrs() {
//some code...
}
void Simulator::drawBoard() {
//some code...
}
void Simulator::fill_queue() {
//some code...
}
void Simulator::run() {
initscr();
start_color();
Simulator::init_clrs();
Simulator::fill_queue();
Simulator::drawBoard();
while (std::cin.get() != (char)27) {
Person* person_obj = _pq.dequeue();
Dog* dog_obj = _dq.dequeue();
person_obj->Person::advance();
dog_obj->Dog::advance();
if (dog_obj->steps == MAX_STEP && person_obj->steps) {
_dq.enqueue(dog_obj);
_pq.enqueue(person_obj);
}
refresh();
}
}
Simulator::~Simulator() {//To_be_changed
delete this;
}
#endif
From what i read i believe the problem may be with the makefile but it seems ok and works until i get the undefined error.
makefile just in case:
tester: main.o simulator.o personqueue.o dogqueue.o character.o person.o dog.o
g++ -Wall main.cpp -lncurses -o tester
main.o: main.cpp
g++ -c -Wall main.cpp -o main.o
simulator.o: Simulator.cpp Simulator.h
g++ -c -Wall Simulator.cpp Simulator.h -o simulator.o
character.o: Character.cpp Character.h
g++ -c -Wall Character.cpp Character.h -o character.o
person.o: Person.cpp Person.h
g++ -c -Wall Person.cpp Person.h -o person.o
dog.o: Dog.cpp Dog.h
g++ -c -Wall Dog.cpp Dog.h -o dog.o
personqueue.o: PersonQueue.cpp PersonQueue.h
g++ -c -Wall PersonQueue.cpp PersonQueue.h -o personqueue.o
dogqueue.o: DogQueue.cpp DogQueue.h
g++ -c -Wall DogQueue.cpp DogQueue.h -o dogqueue.o
clean:
rm -rf *.o tester
Thank you for any input on this issue.
EDIT:
I dont believe the problem is with DogQueue or Person queue as all they include is Dog.h Person.h
but anyways just to be sure:
#include "DogQueue.h"
#include <cstdlib>
//Some code...
#include "PersonQueue.h"
#include <cstdlib>
//some code...

Answer 1

i think you have issues in your make file,
tester: main.o simulator.o personqueue.o dogqueue.o character.o person.o dog.o
g++ -Wall main.cpp -lncurses -o tester
try something like this, though I have not tested the code,
tester: main.o simulator.o personqueue.o dogqueue.o character.o person.o dog.o
g++ -o tester main.o simulator.o personqueue.o dogqueue.o character.o person.o dog.o -lncurses