C++ Program on Dynamic Memory Allocation

Program 1

// Program for Dynamic Memory allocation using new and delete
#include<iostream>
#define clrscr() system("cls")
using namespace std;
int main()
{
          int *ar,n,i,sum=0;
          clrscr();
          cout<<"\nEnter limit of array";
          cin>>n;
          ar=new int[n];  //dynamic memory allocation for array
          cout<<"\nEnter element in array";
          for(i=0;i<n;i++)
                cin>>ar[i];
          
          cout<<"------------------------------------\n";
          for(i=0;i<n;i++)
          {
               cout<<ar[i]<<"\n";      
                sum=sum+ar[i];
          }
          cout<<"\n Sum of array: "<<sum;

         delete ar;  //dynamic memory deallocation for array
}

Program 2

// Program for Dynamic Memory allocation using new and delete
#include<iostream>
#define clrscr() system("cls")
using namespace std;
class Test
{
     int *ar,m,i;
     public:

     //constructor
     Test(int n)
     {
        cout<<"\nThis is constructor memory allocation done\n";
        ar=new int[n];
        m=n;
     }
    void getdata()
    {
          cout<<"\nEnter element in array";
          for(i=0;i<m;i++)
                cin>>ar[i];
    }
    int search(int s)
    {
          int i;
            for(i=0;i<m;i++)
            {
                if(ar[i]==s)
                 return 1;
            }
          return 0;  
    }
    void printdata()
    {
         cout<<"\n------------------------------------\n";
          for(i=0;i<m;i++)
               cout<<ar[i]<<"\n";      
    }
     //destructor
     ~Test()
     {
        cout<<"\nThis is destructor memory deallocation done\n memory is free now";
        delete ar;
     }
};

int main()
{
    clrscr();
    int limit,s;
    cout<<"\nEnter limit of array";
     cin>>limit; 
     Test T(limit);
     T.getdata();
     cout<<"\nEnter element for search";
     cin>>s;
     if(T.search(s))
       cout<<"\nSearching success";
     else
     cout<<"\nSearching not success";  
   //  T.printdata();
    return 0;
}