<< operator overloading in C++

//simple << operator overloading example in C++


#include<iostream.h>
#include<conio.h>
using namespace std;
class log
{
int s;
public:
 friend ostream &operator<<(ostream &, log &);
};
ostream &operator<<(ostream &dout,log &a)
{
dout<<"Enter a value of s  : ";
cin>>a.s;
dout<<"Hey"<< a.s;
return (dout);
}
int main()
{
log a1;
cout<<a1;
getch();
}


/* OUTPUT:

Enter a value of s : 6  [6 is input data from user]
Hey6*/