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class IntegerSet

Posted on 2004-04-13
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Last Modified: 2007-12-19
Need help with the missing function definitions.  Please advise.  Del

#ifndef INT_H
#define INT_H

class IntegerSet {

public:

   IntegerSet(int);
   IntegerSet(const IntegerSet &);

   IntegerSet unionOfIntegerSets(const IntegerSet &);
   IntegerSet intersectionOfIntegerSets(const IntegerSet &);

   void emptySet();
   void inputSet();
   void insertElement(int);
   void deleteElement(int);
   void setPrint() const;
   bool isEqualTo(const IntegerSet &) const;

private:

   int *set;
   int size;

   bool validEntry(int x) const
   {
      return x >= 0 && x < size;

   }

};

#endif

// int.cpp

#include <iostream>
#include <iomanip>

using namespace std;

#include "int.h"

IntegerSet::IntegerSet(int s)
{
   size = s;
   set = new int[size];
   /*Need help in writing call to emptySet */ HELP!

}

IntegerSet::IntegerSet(const IntegerSet &init)
{
   size = init.size;
   /*Need help in writing statement to allocate sufficient memory*/ HELP!

   emptySet();

   for(int i = 0; i < size; i++)
      /*Need help in writing statement to copy elements of init*/ HELP!

}

void IntegerSet::emptySet()
{
   /*Need help in writing function definition for emptySet*/ HELP!

}

void IntegerSet::inputSet()
{
   int number;

   do {
      cout << "Enter an element (-1 to end): ";
      cin >> number;

      if(validEntry(number))
        set[number] = 1;

        else if(number != -1)
        cout << "Invalid Element\n";

   } while(number != -1);
      cout << "Entry complete\n";

}

void IntegerSet::setPrint() const
{
   int x = 1;
   bool empty = true;

   cout << '{';

   for(int u = 0; u < size; ++u)
      if(set[u]) {
      cout << setw(4) << u << (x % 10 == 0 ? "\n" : "");
      empty = false;
      ++x;

      }

   if(empty)
      cout << setw(4) << "---";
      cout << setw(4) << "}" << '\n';

}

IntegerSet IntegerSet::unionOfIntegerSets(const IntegerSet &r)
{
   IntegerSet temp(size > r.size ? size : r.size);
   temp.emptySet();

   int iterations = (size < r.size ? size : r.size);

   for(int i = 0; i < iterations; i++)
      if(set[i] == 1 || r.set[i] == 1)
      temp.set[i] = 1;

   return temp;

}

IntegerSet IntegerSet::intersectionOfIntegerSets(const IntegerSet &s)
{
   /*Need help in writing definition for intersectionOfIntegerSets*/ HELP!

}

void IntegerSet::insertElement(int k)
{
   if(validEntry(k))
      set[k] = 1;
   else
      cout << "Invalid insert attempted!\n";

}

void IntegerSet::deleteElement()
{
   /*NEED DEFINITION WRITTEN FOR deleteElement()*/ HELP!

}

void IntegerSet::isEqualTo()
{
   /*NEED DEFINITION WRITTEN FOR isEqualTo()*/ HELP!

}

// int_driver.cpp

#include <iostream>

using namespace std;

int main()
{
   IntegerSet a(101);
   IntegerSet b(101);
   IntegerSet c(101);
   IntegerSet c(101);
   IntegerSet d(101);

   cout << "Enter set A:\n";
   a.inputSet();
   cout << "\nEnter set B:\n";
   b.inputSet();

   /*NEED WRITTEN CALL TO unionOfIntegerSets FOR OBJECT a PASSING IT b;
     ASSIGN THE RESULT TO d*/ HELP!!

   /*NEED WRITTEN CALL TO intersectionOfIntegerSets FOR OBJECT a PASSING
     IT b; ASSIGN THE RESULT TO d*/ HELP!!

   cout << "\nUnion Of A and B is:\n";
   c.setPrint();
   cout << "Intersection of A and B is:\n";
   d.setPrint();

   if(a.isEqualTo(b))
     cout << "Set A is equal to set B\n";
   else
     cout << "Set A is not equal to set B\n";

   cout << "\nInserting 77 into set A...\n";
   a.insertElement(77);
   cout << "Set A is now:\n";
   a.setPrint();

   cout << "\nDeleting 77 from set A...\n";
   a.deleteElement(77);
   cout << "Set A is now:\n";
   a.setPrint();

   cout << endl;

   return 0;

}







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Question by:edelossantos
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2 Comments
 
LVL 10

Accepted Solution

by:
Mercantilum earned 500 total points
ID: 10821044
Code is below :)

#include <iostream>
#include <iomanip>

using namespace std;

#include "int.h"

IntegerSet::IntegerSet(int s)
{
   size = s;
   set = new int[size];
}

IntegerSet::IntegerSet(const IntegerSet &init)
{
   size = init.size;
   set = new int[size]; //++

   for(int i = 0; i < size; i++)
      set[i] = init.set[i]; //++

}

void IntegerSet::emptySet()
{
    delete [] set;  //++
}

void IntegerSet::inputSet()
{
   int number;

   do {
     cout << "Enter an element (-1 to end): ";
     cin >> number;

     if(validEntry(number))
       set[number] = 1;

       else if(number != -1)
       cout << "Invalid Element\n";

   } while(number != -1);
     cout << "Entry complete\n";

}

void IntegerSet::setPrint() const
{
   int x = 1;
   bool empty = true;

   cout << '{';

   for(int u = 0; u < size; ++u)
      if(set[u]) {
     cout << setw(4) << u << (x % 10 == 0 ? "\n" : "");
     empty = false;
     ++x;

      }

   if(empty)
     cout << setw(4) << "---";
     cout << setw(4) << "}" << '\n';

}

IntegerSet IntegerSet::unionOfIntegerSets(const IntegerSet &r)
{
   IntegerSet temp(size > r.size ? size : r.size);
   temp.emptySet();

   int iterations = (size < r.size ? size : r.size);

   for(int i = 0; i < iterations; i++)
      if(set[i] == 1 || r.set[i] == 1)
     temp.set[i] = 1;

   return temp;

}

IntegerSet IntegerSet::intersectionOfIntegerSets(const IntegerSet &s)
{
   //++
   // will change 'set' to be intersection of current set and 's'
   // check for each item of set, if it is in s.
   // a duplicate set item will remain duplicated in set, [if is in s of course]
   int *newset = new int[size];
   int i,j,remain;
   for (remain=i=0 ; i<size ; i++)
   {
       for (j=0 ; j<s.size && set[i]!=s.set[j] ; j++) /* */;
       if (j < s.size) // it's in
           newset[remain++] = set[i];
   }
   // change set to newset
   delete [] set;
   set = newset;
   size = remain;
   // could be a bit cleaner by deleting set and reallocating the exact right nb of data after intersection
}

void IntegerSet::insertElement(int k)
{
   if(validEntry(k))
     set[k] = 1;
   else
     cout << "Invalid insert attempted!\n";

}

void IntegerSet::deleteElement(int k)
{
   if(validEntry(k))
     set[k] = 0;
   else
     cout << "Invalid delete attempted!\n";
}

bool IntegerSet::isEqualTo(const IntegerSet &s) const
{
   //++
   int i,equal = (size == s.size);

   if (equal)
   {
      for (i=0 ; i<size && set[i]==s.set[i] ; i++) /* */;
      if (i < size) equal = 0;
   }

   return (equal);
}

// int_1_driver.cpp



int main()
{
   IntegerSet a(101);
   IntegerSet b(101);
   IntegerSet *c;  //++
   IntegerSet *d;  //++

   cout << "Enter set A:\n";
   a.inputSet();
   cout << "\nEnter set B:\n";
   b.inputSet();

   //++ union of (a,b) in c
    c = new IntegerSet(a);
    c->unionOfIntegerSets(b);

   //++ intersection of (a,b) in d
    d = new IntegerSet(a);
    d->intersectionOfIntegerSets(b);

   cout << "\nUnion Of A and B is:\n";
   c->setPrint();
   cout << "Intersection of A and B is:\n";
   d->setPrint();

   if(a.isEqualTo(b))
     cout << "Set A is equal to set B\n";
   else
     cout << "Set A is not equal to set B\n";

   cout << "\nInserting 77 into set A...\n";
   a.insertElement(77);
   cout << "Set A is now:\n";
   a.setPrint();

   cout << "\nDeleting 77 from set A...\n";
   a.deleteElement(77);
   cout << "Set A is now:\n";
   a.setPrint();

   cout << endl;

   return 0;

}


--------------------------
int.h :
#ifndef INT_H
#define INT_H

class IntegerSet {

public:

   IntegerSet(int);
   IntegerSet(const IntegerSet &);

   IntegerSet unionOfIntegerSets(const IntegerSet &);
   IntegerSet intersectionOfIntegerSets(const IntegerSet &);

   void emptySet();
   void inputSet();
   void insertElement(int);
   void deleteElement(int);
   void setPrint() const;
   bool isEqualTo(const IntegerSet &) const;

private:

   int *set;
   int size;

   bool validEntry(int x) const
   {
     return x >= 0 && x < size;

   }

};

#endif
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