C++ undefined reference to vtable on compile

Question

Why do I keep getting an error on compile with this code?

#ifndef OPERATOR_H
#define OPERATOR_H
#include <cstdlib>
#include <iostream>
#include <string>
#include "Individual.h"

using namespace std;

class Operator
{
public:
Operator();

virtual void execute (Individual* parent);

private:

};
#endif

Then in the cpp file I have

#include <cstdlib>
#include <iostream>
#include <string>
#include "Operator.h"

using namespace std;

Operator::Operator()
{  

}

void execute(Individual* parent)
{    

}

Give more details on error, what is in `Individual.h` and try to avoid includes in a header file — Karthik T, Sep 06 '13 at 01:49
Crap, just realised I needed Operator:: in front of the execute function. — user2661167, Sep 06 '13 at 01:52
Yeah stupid mistake due to lack of sleep. Working now after changing the CPP file void Operator::execute(Individual* parent) — user2661167, Sep 06 '13 at 01:53

score 0 · Answer 1 · answered Sep 06 '13 at 02:16

0

Define a destructor. The vtable for a class with virtual methods is created in the translation unit that defines the constructor.

In your header, add:

virtual ~Operator();

And in your source file, add:

Operator::~Operator() {
}

answered Sep 06 '13 at 02:16

Tyler McHenry

72,029
16
119
161

C++ undefined reference to vtable on compile

1 Answers1