C++ Classes, problem with function.

[Enrui]

When I run my code through G++ I get the following error. I recently re-wrote my code on the advice of DWhitney and found that I'm not sure how to use certain features.

Here's my problem...


error: request for member 'returnModel' in 'Ferrari' which is of non-class type 'car*'

now I'm aware that I have the following function defined within the class.

returnModel()
{
return (carModel);
}

I have also defined Ferrari within main()

car* ferrari = new car ( ...data here...)

Now I entered this code.

cout << ferrari.returnModel()

and got the above error, could someone supply a hint.

[dwhitney67]

See if you can put the following to use:


#include <string>
#include <iostream>

class Car
{
public:
...

std::string getModel() const
{
return carModel;
}

...

private:
std::string carModel;
...
};

int main()
{
using namespace std;

Car* ferrari = new Car("Ferrari", 280, 250, 275000);

cout << ferrari->getModel() << endl;

delete ferrari;
}

[Enrui]

apart from

delete ferrari;

It seems to like it.

-> is new to me, what is it? (so I can go and research)

delete ferrari gives an error

undefined reference to 'cars::~cars()'
collect2: ld returned 1 exit status.

[Zugzwang]

undefined reference to 'cars::~cars()'


This means that you declared a destructor for the class "cars", but didn't define it.

[dwhitney67]

If you declare a destructor for your class, then you need to implement it as well.

I presume you have something like this in your class:


class Cars
{
public:
...

~Cars();
};

You can implement the destructor within the class, or outside of it, the choice is yours. Here are the two ways:


class Cars
{
public:
...

~Cars() {}
};

// or

Cars::~Cars() {}

[Enrui]

Perfect, thanks.