pointer_example.cpp

#include <iostream>
#include <string>
using namespace std;

// REF: https://www.quora.com/Why-use-of-pointer-make-the-c-c++-language-less-secure-How-hackers-can-take-advantage-of-it
 
class Example
{
    private:
        int a=10;					//private variable
    public:
        int b=20;         //public variable
};
 
int main()
{
  Example exe;
  int *ptr;
  ptr=&exe.b;						//ptr that stores the address of b
  cout<<"Var b: "<< *(ptr) <<endl;
  --ptr;              //decrease the value by 1
  cout<<"Var a: "<< *(ptr) <<endl;
  return 0;
}