The illustration shows the syntax as follows:

"class ClassName
{
public:
. . ."
"friend istream& operator >>(istream& Parameter_1," with "operator" annotated as "Parameter for the stream" and "istream&" annotated as "Parameter for the object to receive input."
"ClassName& Parameter_2);
friend ostream& operator <<(ostream& Parameter_3,
const ClassName&
Parameter_4);"