Fibonacci using copy constructor

#include"iostream.h"
#incl:
#include<conio.h>
class fibonacci
{
int f,x,y;
public:
fibonacci()
{
f=0;
x=1;
y=f+x;
}
fibonacci (fibonacci &g)
{
   f=g.f;
x=g.x;
y=g.y;
}
void find()
{
  f=x;
x=y;
y=f+x;
}

void dis()
{
cout<<y<<"\n";
}
};
vboid main(void)
{
fibonacci num;
for(i=0;i<=12;i++)
{
num.dis();
num.find();
}
}