studenti.cpp

// studenti.cpp -- Student class using private inheritance
#include "studenti.h"
using std::ostream;
using std::endl;
using std::istream;
using std::string;

// public methods
double Student::Average() const
{
	if (ArrayDb::size() > 0) {
		return ArrayDb::sum()/ArrayDb::size();
	} else {
		return 0;
	}
}

const string & Student::Name() const
{
	return (const string &) *this;
}

double & Student::operator[](int i)
{
	return ArrayDb::operator[](i);
}

double Student::operator[](int i) const
{
	return ArrayDb::operator[](i);
}

ostream & Student::arr_out(ostream & os) const
{
	int i;
	int lim = ArrayDb::size();
	if (lim > 0) {
		for (i = 0; i < lim; i++) {
			os << ArrayDb::operator[](i) << " ";
			if (i % 5 == 4) {
				os << endl;
			}
		}
		if (i % 5 != 0) {
			os << endl;
		}
	} else {
		os << " empty array ";
	}
	return os;
}

// use string version of operator>>()
istream & operator>>(istream & is, Student & stu)
{
	is >> (string &)stu;
	return is;
}

istream & getline(istream & is, Student & stu)
{
	getline(is, (string &)stu);
	return is;
}

ostream & operator<<(ostream & os, const Student & stu)
{
	os << "Scores for " << (const string &)stu << ":\n";
	stu.arr_out(os);	// use private method for scores
	return os;
}