array of pointers in cpp complete course

#include<stdio.h> 
  
int main() 
{ 
  int arr[5] = { 1, 2, 3, 4, 5 }; 
  int *ptr = arr; 
  
  printf("%d\n", *(ptr+1)); 
  return 0; 
} 

// C program to print elements of a 2-D array  
// by scripting a pointer to an array  
#include<stdio.h> 
  
int main() 
{ 
  int arr[3][4] = {  
                    {10, 11, 12, 13},  
                    {20, 21, 22, 23},  
                    {30, 31, 32, 33}  
                  }; 
  int (*ptr)[4]; 
  ptr = arr; 
  printf("%p %p %p\n", ptr, ptr + 1, ptr + 2); 
  printf("%p %p %p\n", *ptr, *(ptr + 1), *(ptr + 2)); 
  printf("%d %d %d\n", **ptr, *(*(ptr + 1) + 2), *(*(ptr + 2) + 3)); 
  printf("%d %d %d\n", ptr[0][0], ptr[1][2], ptr[2][3]); 
  return 0; 
} 

#include <iostream>
 
using namespace std;
const int MAX = 3;
 
int main () {
   int  var[MAX] = {10, 100, 200};
   int *ptr[MAX];
 
   for (int i = 0; i < MAX; i++) {
      ptr[i] = &var[i]; // assign the address of integer.
   }
   
   for (int i = 0; i < MAX; i++) {
      cout << "Value of var[" << i << "] = ";
      cout << *ptr[i] << endl;
   }
   
   return 0;
}