Memory management new-delete : delete « Development « C++ Tutorial

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#include <iostream.h>
#include <stdlib.h>

int main ()
{
  char input [100];
  int count,n;
  long * longPointer, total = 0;
  
  cout << "How many numbers do you want to type in? ";
  
  cin.getline (input,100); 
  count=atoi (input);
  
  longPointer= new long[count];
  
  if (longPointer == NULL) 
      exit (1);
  
  for (n=0; n<count; n++)
  {
    cout << "Enter number: ";
    cin.getline (input,100); 
    longPointer[n]=atol (input);
  }

  cout << "You have entered: ";
  for (n=0; n<count; n++)
    cout << longPointer[n] << ", ";

  delete[] longPointer;
  return 0;
}

How many numbers do you want to type in? 1
Enter number: a
You have entered: 0, "