Konversi Bilangan Lengkap

#include <iostream.h>
#include <conio.h>
#define namespace std;

const int STACK_SIZE = 100;

class stack {
     private:
          int count;
          int data[STACK_SIZE];
     public:
          stack();
          ~stack();
          void push(const int item);
          int pop(void);
     };
stack::stack()
{
     count = 0;
}
stack::~stack() {}
void stack::push(const int item)
{
     if (count < STACK_SIZE)
     {
          data[count] = item;
          ++count;
     }
     else cout << "Overflow!\n";
}
int stack::pop(void)
{
     if (count >0)
     {
          --count;
          return (data[count]);
     }
     else
     {
          cout << "Underflow!\n";
          return 0;
     }
}
int menu();

class number
{
     public:
          number() {x=0;}
          number (int num){x=num;}
          virtual ~number() {}
          virtual void print_it()=0;
          int num;
     private:
     int x;
};






//Program tentang konversi bilangan ke biner
class toBinary:public number
{
public:
          void print_it()
                    {
                    int num;
                    int total = 0;
                    stack reverse;
                    int ctr=0;
                    cout << "Masukkan angka desimal : ";
                    cin >> num;
                    cout << "Angka yg anda masukkan : " << num <<endl;
            cout << "Angka biner dari "<< num <<" adalah : ";
                         while(num > 0)
                               {
                                   total = num % 2;
                                   num /= 2;
                               reverse.push(total);
                               ctr++;
                           }
                         while (ctr > 0)
                              {
                                   cout << reverse.pop() << " ";
                                   ctr--;
                               }
                    }
};








//ini adalah konversi dari desimal ke oktal
class toOctal: public number
{
     void print_it()
     {
          int num;
          int total = 0;
          stack reverse;
          int ctr=0;
               cout << "Masukkan angka desimal : ";
               cin >> num;
               cout << "Angka yg anda masukkan : " << num <<endl;
         cout << "Angka Oktal dari "<<num <<" adalah : ";
               while(num > 0)
                    {
                         total = num % 8;
                         num /= 8;
                         reverse.push(total);
                         ctr++;
                    }
               while (ctr > 0)
                   {
                         cout << reverse.pop() << " ";
                         ctr--;
                    }
     }
};










//ini adalah program bagian konversi dari desimal ke heksa
class toHex:public number
{
     void print_it()
     {
        int num,counter,x,a,hex[100];
     cout<<"Masukkan angka desimal : ";
     cin>>num;
     cout<<"Angka yg anda masukkan : " << num <<endl;
   cout << "Angka Oktal dari "<<num <<" adalah : ";
     for(counter=0;num!=0;counter++)
          {
               a=num%16;
               hex[counter]=a;
               num=num/16;
          }
     for(x=counter-1;x>=0;x--)
     {
          if (hex[x] > 9)
          cout << char('A'+hex[x]-10);
     else
          cout << hex[x];
     }
     cout << endl;
     }
};




//ini adalah void utama untuk program tersebut
void main(){
     number * Show;
          int choice = menu();
          switch(choice){
          case (1):
               Show = new toBinary();
               Show->print_it();
               delete Show;
               break;
          case (2):
               Show = new toOctal();
               Show->print_it();
               delete Show;
               break;
          case(3):
               Show = new toHex();
               Show->print_it();
               delete Show;       
               break;
          }
getch();
}



int menu(){
     int choice;
     cout << "Konversi desimal ke biner, oktal dan heksa : " << endl;
     cout << "1. Binary" << endl;
     cout << "2. Octal" << endl;
     cout << "3. Hexadecimal" << endl;
     cout << "Pilihan anda : ";cin >> choice;
     return c