istream and ostream not declared?
My program keeps saying istream and ostream are not declared when I'm trying to create this class:
as you can see im including iostream, i also tried ios, istream & ostream and none work... any ideas?
double get_cost() const;
void set_cost(double c);
virtual void output(ostream & outs) = 0;
virtual void input(istream & ins) = 0;