#include <iostream>

using namespace std ;

int main()
{
    int x1 = 10;
    const int* ptr1 = &x1 ;

    //Can't do because ptr points to a constant
    //*ptr1 = 20 ;

    int* ptr2 = const_cast<int*>(  ptr1 ); // Casting away constness
    *ptr2 = 20 ;
    cout << "x1:" << x1 << endl ;


    const int x3 = 10;
    int* ptr3 = const_cast<int*>( &x3 ) ;
    *ptr3 = 22 ;
    //Doesn't change the original x3 . Undefined
    //behavior. Not recommended
    cout << "x3:" << x3 << endl ;



    int x4 = 10;
    const int& constRef = x4 ;

    // Attempting to modify value through constRef directly will result in a compiler error
    // constRef = 20; // Error: assignment of read-only reference

    // Use const_cast to remove constness from the reference
    int& nonConstRef = const_cast<int&>(constRef);
    nonConstRef = 20;

    cout << "x4: " << x4 << endl;
    // Output: Value: 20






    return 0;
}