01. const

#include <iostream>

using namespace std;

int main()
{
    const int i = 9;
    const_cast<int&>(i) = 6; // changing cost value

    int j;
    static_cast<const int&>(j); // casting static to const

    const int* p1 = &i;
    int const* p4 = &i;

    cout << p1 << endl;
    *p1++;


    // cout << p1 << endl;
    // 1. When const is on the left of *, data is const
    // 2. If const is on the right of *, pointer is const


    // Why use const
    //      a) Guards the value
    //      b) Self documenting
    //      c) Enable the compiler to do more optimization, making the code tighter
    //      d) Const means the variable can be put in ROM; useful for embedded


}