Simple look at casting operator overload:

#include <iostream>
using namespace std;

class fun{
    int _data;
    char _char;
    int* _data2;
    public:
    fun():_data(0){}
    fun(int d):_data(d),_char('w'),_data2(0){}
    fun(int d, char c):_data(d),_char(c),_data2(0){}
    fun(int d, char c,int size):_data(d),_char(c){_data2 = new int[size];}
    void show(){cout << "data is: " << _data << endl;
                cout << "character is: "<< _char << endl;}
    operator int(){cout << "inside int casting operator" << endl;//casting operator int()
                    return _data;}
    operator char(){{cout << "inside char casting operator" << endl;//casting operator char()
                    return _char;}}
    operator int*(){cout << "inside int* casting operator" << _data2<<endl;//casting operator int*()
                    return _data2;}
    ~fun(){
        delete [] _data2;
    }
};

int main (){
    int x=20;
    char c='d';
    int* ptr(0);

    fun a(5);
    a.show();
    x=(int)a;//calling int casting operator of class
    cout << "x: " << x << endl;//output: x: 5
    cout << endl;
    fun stuff(10,'f',3);
    stuff.show();
    c = char(stuff);//calling char casting operator of class
    cout << c << endl;//output: f

    cout << "&ptr: " << ptr << endl;
    cout << "size: " << sizeof(ptr) << endl;
    ptr = (int*)stuff;//calling int* casting operator
    cout << "&ptr: " << ptr << endl;//output &ptr: (same addess as _data2 in fun class)
    cout << "size: " << sizeof(ptr) << endl;

    delete [] ptr;

    return 0;
}
//ps a little thanks to Mr. D'amico for telling me casting is a operator XD