creates a safe array class. : Your array « Data Types « C++ Tutorial

1. C++ Tutorial
2. Data Types
3. Your array

#include <iostream>
#include <new>
#include <cstdlib>
using namespace std;
   
class array {
  int *p;
  int size;
public:
  array(int sz) {
    try {
      p = new int[sz];
    } catch (bad_alloc xa) {
      cout << "Allocation Failure\n";
      exit(EXIT_FAILURE);
    }
    size = sz;
  }
  ~array() { delete [] p; }
   
  // copy constructor
  array(const array &a);
   
  void put(int i, int j) {
    if(i>=0 && i<size) p[i] = j;
  }
  int get(int i) {
    return p[i];
  }
};
   
// Copy Constructor
array::array(const array &a) {
  int i;
   
  try {
    p = new int[a.size];
  } catch (bad_alloc xa) {
    cout << "Allocation Failure\n";
    exit(EXIT_FAILURE);
  }
  for(i=0; i<a.size; i++) p[i] = a.p[i];
}
   
int main()
{
  array num(10);
  int i;
   
  for(i=0; i<10; i++) num.put(i, i);
  for(i=9; i>=0; i--) cout << num.get(i);
  cout << "\n";
   
  // create another array and initialize with num
  array x(num); // invokes copy constructor
  for(i=0; i<10; i++) cout << x.get(i);
   
  return 0;
}