how to count the number of objects created in c++

Question

how to count the number of objects created in c++

pls explain with a simple example

Answer 1

You could create a counter variable into the public: of your class (assuming here you're talking about counting objects from a class you created)

class Widget {
public:
    Widget() { ++count; }
    Widget(const Widget&) { ++count; }
    ~Widget() { --count; }

    static size_t howMany()
    { return count; }

private:
    static size_t count;
};
// obligatory definition of count. This
// goes in an implementation file
size_t Widget::count = 0;

Taken from ddj.com