// Illustrates pass by address with structures

#include <iostream>
#include <iomanip>
using namespace std;

const int SIZE = 5;
const int MAXNAME = 20;

struct Student
{
     char fName[MAXNAME];            // first name
     char lName[MAXNAME];            // last name
     int socSecNumber;          // social security number
     double gpa;                // grade point average
};

// some functions

void LoadStudentData(Student* sp);
void PrintStudentArray(const Student* sArray);
void PrintOneStudent(const Student& sp);

int main()
{
  Student sList[SIZE];		// array of 5 students
  int i;

  for(i = 0; i < 5; i++)
  {
     cout << "Entering data for student " << i+1 << "... \n";
     LoadStudentData(&sList[i]);
  }

  PrintStudentArray(sList);

  return 0;
}

void LoadStudentData(Student* sp)
{
  cout << "Enter first name: ";
  cin.getline(sp->fName, MAXNAME);
  cout << "Enter last name: ";
  cin.getline(sp->lName, MAXNAME);
  cout << "Enter SSN: ";
  cin >> sp->socSecNumber;
  cout << "Enter GPA: ";
  cin >> sp->gpa;

  // consume remaining characters up through newline.
  while (cin.get() != '\n')
	;
}

void PrintOneStudent(const Student& s)
// prints the internal data of any student structure passed in
// structure is passed in by const reference (avoids making copy)
{
  cout << left;
  cout << setw(20) << s.fName << ' ' << setw(20) << s.lName << "  "
       << setw(10) << s.socSecNumber;
  cout << "  GPA:   " << right << fixed << setprecision(2)
       << setw(4) << s.gpa << '\n';
}

void PrintStudentArray(const Student* sArray)
{
  cout << "\n\nPrinting student records\n\n";

  for (int i = 0; i < SIZE; i++)
     PrintOneStudent(sArray[i]);
}