/* lab2.cpp
 *
 * This is the main program that reads students from the file and
 * store them in student objects.
 */

#include "student.h"
#include <iostream>
#include <fstream>
using namespace std;

// The maximum number of students to read in
const int array_size = 10;
const int number_length = 7;
const int name_length = 21;

// read a student from file
void readStudent(istream&, Student&);
// write a student on screen
void writeStudent(Student);

// main method
int main(void)
{
  Student students[array_size];      // an array of students
  int i;                             // counter for "for" loops

  fstream input;                     // input stream

  char inputname[40];                // input filename

  cout << "What is the input file name? ";
  cin >> inputname;

  // open the file for input
  input.open(inputname, ios::in);

  // Check to make sure that we could open the files properly!
  if (input.fail()) {
    cerr << "Could not open file ";
    cerr << inputname;
    cerr << ".\n";
    return 1;
  }

  // read students
  for (i=0;i<array_size;i++) {
    readStudent(input, students[i]);
  }

  // write students
  cout << "Students in the file:" << endl;
  for (i=0;i<array_size;i++) {
    writeStudent(students[i]);
  }

  // Program completed successfully! */
  return 0;
}

// read a student from file
void readStudent(istream& input, Student& s)
{
  string numberstr;
  string namestr;
  long int number;

  string line;

  // read in a line from fine
  getline(input,line,'\n');

  // get the number and name strings
  numberstr = line.substr(0,number_length);
  namestr = line.substr(number_length,name_length);

  // Convert the number string into a long int.
  number = atol((numberstr.c_str()));

  // set number and name for student s
  s.setNumber(number);
  s.setName(namestr);
}

// write a student on screen
void writeStudent(Student s)
{
  cout << "    Number: " << s.getNumber() << " Name: " << s.getName() << endl;
}