const pointer to pointer c++ code example

Example 1: const pointer c++

int *p;										// pointer to int
const int *p == int const *p;				// pointer to const int
int * const p;								// const pointer to int
const int * const p == int const * const p;	// const pointer to const int

Example 2: pointers to pointers in cpp

#include <iostream>
 
using namespace std;
 
int main () {
   int  var;
   int  *ptr;
   int  **pptr;

   var = 3000;

   // take the address of var
   ptr = &var;

   // take the address of ptr using address of operator &
   pptr = &ptr;

   // take the value using pptr
   cout << "Value of var :" << var << endl;
   cout << "Value available at *ptr :" << *ptr << endl;
   cout << "Value available at **pptr :" << **pptr << endl;

   return 0;
}