//deepcopy.cpp
//where have all the children gone
#include<iostream>
#include<fstream>
using namespace std;
#define GOODCOPY

//global
ofstream out("familyout.txt", ios::app);

class family {
  private:
    int momsAge;
    int dadsAge;
    int numKids;
    int* theKidsAges;
  public:
    family(const int m, const int d, const int n);
    
#ifdef GOODCOPY
    family(const family & f);  //copy constructor
#endif
    ~family();
    void display() const; //const here says won't change calling object
    void changeAnAge(int kidnumber,int age);
    
#ifdef GOODCOPY
    const family & operator=(const family & right);  
#endif
  };

family::family(int m, int d, int n)
  {
  momsAge=m;
  dadsAge=d;
  numKids=n;
  theKidsAges=0;
  if (numKids!=0)
    {
    theKidsAges=new int[numKids];
    int i;
    for (i=0;i<numKids;i++)
        {
        out << "Enter age:  ";
        cout << "Enter age: ";
        cin >> theKidsAges[i];
        out << theKidsAges[i] << endl;  //echo
        }  //end for
     }  //end if
  }
  
#ifdef GOODCOPY
family::family(const family & f)
  {
  momsAge=f.momsAge;
  dadsAge=f.dadsAge;
  numKids=f.numKids;
  theKidsAges=0;
  //below is the part the compiler wouldn't do
  if (numKids!=0)
    {
    theKidsAges=new int[numKids];
    for (int i=0; i<numKids; i++)
        theKidsAges[i]=f.theKidsAges[i];
    } // end if
  }
#endif

family::~family()
  {
  out << "Destroying a family.\n";
  if (numKids!=0)
  {
    for (int i=0; i<numKids; i++)
        {
        out << "Getting rid of a kid of age "
            << theKidsAges[i] << endl;
        }  //end for
    delete [] theKidsAges;
    } //end if
  }
  
void family::display() const
  {
  out << "MOM:" << momsAge 
    << "  DAD: " << dadsAge << endl;
  if (numKids!=0)
    {
    out << "The " << numKids << " kids: " << endl;
    for (int i=0; i<numKids ; i++)
        {
        out << theKidsAges[i] << ' ';
        } // end for
    out<<endl;
    } //end if
  } //end display()


void family::changeAnAge(int kidnumber,int age)
  {
  if (kidnumber>=1 && kidnumber<=numKids)
    theKidsAges[kidnumber-1]=age;
  }

#ifdef GOODCOPY
const family & family::operator=(const family & right)  
    {
    out << "In operator=\n";
    //get rid of old family
    if (numKids!=0)
    delete [] theKidsAges;
    theKidsAges=0;
    //copy new family
    momsAge=right.momsAge;
    dadsAge=right.dadsAge;
    numKids=right.numKids;
    if (numKids!=0)
    {
    theKidsAges=new int[numKids];
    int i;
    for (i=0;i<numKids;i++)
        {
        theKidsAges[i]=right.theKidsAges[i];
        }  //end for
     }  //end if
    return right;
    }
 #endif

int main()
  {
  // copy a family with kids using copy constructor
  family Jones(35, 40,3);
  out << "Jones\n";
  Jones.display();
  family Smith=Jones;  //copy constructor
  out << "Smith\n";
  Smith.display();
  
  //change one kid in one family
  Jones.changeAnAge(1,18);
  out << "Jones after change\n";
  Jones.display();
  out << "Smith with no change\n";
  Smith.display();
  
  //a family with no kids
  family Chevez(30,40,0);
  out << "Chevez with no kids.\n";
  Chevez.display();
  
  //checking out assignment =
  family Ho(30, 31,2);
  out << "Ho with 2 kids.\n";
  Ho.display();
  Ho=Smith;
  out << "Ho looking like Smith, 3 kids.\n";
  Ho.display();
  Ho.changeAnAge(1,5);
  out << "Ho after change.\n";
  Ho.display();
  out << "Smith shouldn't change.\n";
  Smith.display();
  
  //assign a family with no kids to a family that had kids
  Ho=Chevez;
  out << "New Ho with no kids.\n";
  Ho.display();
  Ho=Smith;
  out << "Ho with 3 kids again.\n";
  Ho.display();
  
  return 0;
  }