/** Attempting to modify a constant pointer to non-constant data. */
#include <iostream>
using namespace std;
int main()
{
    int x = 2, y = 5;
    int *const myPtr = &x;  // constant pointer to a (non-constant) int
                             // The data pointed to by myPtr can be 
                             // modified through myPtr, but myPtr must
                             // always point to the same memory location.

    *myPtr = 99;   // change value stored in x to 99
    myPtr = &y;    // syntax error!! can't point to a different int

    cout << *myPtr << endl;

    return 0;
}