CS 222/420   Winter 1999,  Instructor:  Jeffrey Horn

HOMEWORK 5:  DESTRUCTORS and MEMORY MANAGEMENT
 

Handed out/Assigned:	Friday, April 2, 1999
Due:	Friday, April 9, 1999

STEPS:  For both parts below, fix the code by adding destructors, "delete" commands, etc., so that
there are no more memory leaks!  Both problems start with leaks.  Fix them.  Your mains should then run forever.  COMMENT YOUR DESTRUCTORS!
 

PART 1:  (click here to go straight to text file of code)

#include<iostream.h>

const int ARRAYSIZE = 100000;
 

class  Individual
 {
    public:

       int identification;
       int age;
       float weight;
       float *data[ARRAYSIZE];

       Individual(int ID)               //   Constructor
         {

           identification = ID;
           age = 10 *  ID;
           weight = 99;

           for (int j = 0; j< ARRAYSIZE; j++)
               {
                  data[j] = new float;
                  *data[j] = j / 3.14;
               };
          }

       ~Individual() { }               //   Destructor
                                       //    ADD CODE HERE.

     };

void main()
{
       Individual *me;
       int count = 0;

       while(1)
        {

          me = new Individual(count);
          cout << count++ << "\n" ;
        }
}

PART 2:  (click here to go straight to text file of code)

#include<iostream.h>

const int ARRAYSIZE = 100000;
const int ARRAYSIZE2 = 10000;

class Personal_History
  {
    public:

       int *transactions[ARRAYSIZE];
       float past_acct_balances[ARRAYSIZE];

       Personal_History()               //  Constructor
          {
            for (int i = 0; i<ARRAYSIZE; i++)
                {
                 transactions[i] = new int;
                 *transactions[i] = i*55;

                 past_acct_balances[i] = i*10.89;
                }
          }

       ~Personal_History()  { }         //  Destructor.
                                       //  ADD CODE HERE!

  };

class Individual
 {
    public:
       int identification;
       int age;
       float weight;
       float *data[ARRAYSIZE2];
       Personal_History thePast;

       Individual(int ID)               //   Constructor
         {
           identification = ID;
           age = 10 *  ID;
           weight = 99;

           for (int j = 0; j< ARRAYSIZE; j++)
               {
                  data[j] = new float;
                  *data[j] = j / 3.14;
               };
          }

       ~Individual() { }               //   Destructor
                                       //    ADD CODE HERE!

     };