76 lines
1.5 KiB
C++
76 lines
1.5 KiB
C++
// studentc.cpp -- Student class using containment
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#include "studentc.h"
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using std::ostream;
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using std::endl;
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using std::istream;
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using std::string;
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//public methods
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double Student::Average() const
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{
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if (scores.size() > 0)
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return scores.sum()/scores.size();
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else
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return 0;
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}
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const string & Student::Name() const
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{
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return name;
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}
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double & Student::operator[](int i)
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{
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return scores[i]; // use valarray<double>::operator[]()
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}
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double Student::operator[](int i) const
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{
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return scores[i];
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}
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// private method
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ostream & Student::arr_out(ostream & os) const
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{
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int i;
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int lim = scores.size();
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if (lim > 0)
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{
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for (i = 0; i < lim; i++)
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{
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os << scores[i] << " ";
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if (i % 5 == 4)
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os << endl;
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}
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if (i % 5 != 0)
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os << endl;
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}
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else
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os << " empty array ";
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return os;
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}
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// friends
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// use string version of operator>>()
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istream & operator>>(istream & is, Student & stu)
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{
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is >> stu.name;
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return is;
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}
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// use string friend getline(ostream &, const string &)
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istream & getline(istream & is, Student & stu)
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{
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getline(is, stu.name);
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return is;
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}
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// use string version of operator<<()
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ostream & operator<<(ostream & os, const Student & stu)
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{
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os << "Scores for " << stu.name << ":\n";
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stu.arr_out(os); // use private method for scores
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return os;
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}
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