PracticeDev/study_cpp/cpp_primer_source_code/Chapter 15/constcast.cpp

// constcast.cpp -- using const_cast<>
#include <iostream>
using std::cout;
using std::endl;

void change(const int * pt, int n);

int main()
{
    int pop1 = 38383;
    const int pop2 = 2000;

    cout << "pop1, pop2: " << pop1 << ", " << pop2 << endl;
    change(&pop1, -103);
    change(&pop2, -103);
    cout << "pop1, pop2: " << pop1 << ", " << pop2 << endl;
    // std::cin.get();
    return 0;
}

void change(const int * pt, int n)
{
    int * pc;
  
    pc = const_cast<int *>(pt);
    *pc += n;
 
}