CS202 4- ‹#›
Virtual Friends
class account {
friend std::ostream
&operator<<(std::ostream &,account&);
protected:
virtual void statement(std::ostream
&);
...
};
class checking : public
account {
...
protected:
void
statement(std::ostream &); //helper fnct
};
class student : public
checking {
...
protected:
void
statement(std::ostream &); //helper
fnct
};
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