Insertion sort cpp program

CPP Program to implement  insertion sort

#include<iostream.h>

#include<conio.h>

#include<stdlib.h>

const int MAX=50;

class array

{ private:

          int arr[MAX];

          int count;

  public:

          array()

          { count=0;}

          void add(int);

          void display();

          void sort();

};

void array::add(int item)

{        if(count<MAX)

          {        arr[count]=item;

                    count++;

          }

          else

                   cout<<"\nArray is full";

}

void array::display(void)

{        cout<< "\nThere are"<<count<<" elements in the list \n";

          cout<<"\n They are : \n";

          for(int i=0;i<count;i++)

                   cout<<arr[i]<<" ";

}

void array::sort()

{        for(int i=0;i<count;i++)

          {        int value=arr[i];

                    for(int j=i-1;((j>=0)&&(arr[j]>value));j--)

                             arr[j+1]=arr[j];

                    arr[j+1]=value;

          }

          return;

}

void main()

{        int element,n,i,c;

          array insertion;

          while(1)

          {        clrscr();

                   cout<<"\nPerform the Insertion Sort";

                   cout<<"\n-------------------------------";

                   cout<<"\n1.Input data into the list";

                   cout<<"\n2.Display data in the list";

                   cout<<"\n3.Sort the list";

                   cout<<"\n4.Exit from the program";

                   do

                    {        cout<<"\nSelect your choice(1:4)";

                             cin>>c;

                             cout<<"";

                    }

                   while((c<1)||(c>4));

          if(c==4)exit(1);

          clrscr();

          switch(c)

                    { case 1 :    

clrscr();

                             cout<<"How many elements : ";

                             cin>>n;

                             for(i=0;i<n;i++)

                             {        cout<<"Enter a number " <<i+1<< " : ";

                                      cin>>element;

                                      insertion.add(element);

                             }

                             break;

                   case 2 :

                   clrscr();

                             insertion.display();

                             break;

                   case 3 :

                             clrscr();

                             insertion.sort();

                             cout<<"List is successfully sorted \n";

                             break;

                   }

          cout<<"\nPress any key to continue............";

          getch();

          }

}