Dynamically allocated arrays code snippet

#include <iostream>

 

using namespace std;

 

int main() {

      // (recalling static arrays)

      // declare static array

      int arr[3] = {1, 2, 3};

 

      // print values stored in arr

      for (int i = 0; i < 3; i++)

            cout << "arr[" << i << "]: " << arr[i] << endl;

      cout << endl;

 

      // declare pointer to int

      int *pArr;

 

      // allocate memory for three integers

      pArr = new int[3];

 

      // assign values using square brackets []

      pArr[0] = 1;

      pArr[1] = 2;

      pArr[2] = 3;

 

      // three ways to print pArr contents

      // (1)

      for (int i = 0; i < 3; i++)

            cout << "pArr[" << i << "]: " << pArr[i] << endl;

      cout << endl;

 

      // (2)

      for (int i = 0; i < 3; i++)

            cout << "*(pArr + " << i << "): " << *(pArr + i) << endl;

      cout << endl;

 

      // (3)     

      int *pIter = pArr;

      for (int i = 0; i < 3; i++)  {

            cout << "*pIter: " << *pIter << endl;

            pIter++;

      }

 

      // free memory

      delete [] pArr;

 

      return 0;

}