Save and read class back and forth to a file : Object Serialize « File « C++

1. C++
2. File
3. Object Serialize

Save and read class back and forth to a file

#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;

class Person {
  char name[80];
  char areaCode[4];
  char prefix[4];
  char num[5];
public:
  Person() { };
  Person(char *n, char *a, char *p, char *nm)
  {
    strcpy(name, n);
    strcpy(areaCode, a);
    strcpy(prefix, p);
    strcpy(num, nm);
  }
  friend ostream &operator<<(ostream &stream, Person o);
  friend istream &operator>>(istream &stream, Person &o);
};

ostream &operator<<(ostream &stream, Person o)
{
  stream << o.name << " ";
  stream << "(" << o.areaCode << ") ";
  stream << o.prefix << "-";
  stream << o.num << endl;
  return stream; // must return stream
}

istream &operator>>(istream &stream, Person &o)
{
  cout << "Enter name: ";
  stream >> o.name;
  cout << "Enter area code: ";
  stream >> o.areaCode;
  cout << "Enter prefix: ";
  stream >> o.prefix;
  cout << "Enter number: ";
  stream >> o.num;
  cout << endl;
  return stream;
}

int main()
{
  Person personObject;
  char c;

  fstream pb("phone", ios::in | ios::out | ios::app);

  if(!pb) {
    cout << "Cannot open phone book file.\n";
    return 1;
  }

  for(;;) {
    do {
      cout << "1. Enter numbers\n";
      cout << "2. Display numbers\n";
      cout << "3. Quit\n";
      cout << "\nEnter a choice: ";
      cin >> c;
    } while(c < '1' || c > '3');

    switch(c) {
      case '1':
        cin >> personObject;
        cout << "Entry is: ";
        cout << personObject;                       
        pb << personObject;                         
        break;
      case '2':
        char ch;
        pb.seekg(0, ios::beg);
        while(!pb.eof()) {
          pb.get(ch);
          if(!pb.eof()) 
             cout << ch;
        }
        pb.clear();                      
        cout << endl;
        break;
      case '3':
        pb.close();
        return 0;
    }
  }
}


           
       

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