// source file for Student_info-related functions

#include "Student_info.h"

#include "grade.h"

using std::istream; using std::vector;

using std::cout; using std::endl;

bool compare(const Student_info& x, const Student_info& y)

{

return x.name() < y.name(); // Modified for class Student_info Ch. 9

}

// Modified for class Student_info Ch. 9

istream& Student_info::read(istream& is)

{

cout << "step0" << endl;

is >> n >> midterm >> final;

cout << "step1" << endl;

read_hw(is, homework);

cout << "step2" << endl;

finalGrade = ::grade(midterm, final, homework);

return is;

}

istream& Student_info::read_hw(istream& in, vector<double>& hw)

{

if (in) {

// get rid of previous contents

hw.clear();

// read homework grades

double x;

while (in >> x)

hw.push_back(x);

// clear the stream so that input will work for the next student

in.clear();

}

return in;

}