#include <iostream>

using namespace std;

int main() {
	void remove_const(const float *p);

	float        d = 2.5;
	const float *p = &d;

	d = 3.5;
	// *p = 0.0; // disallowed because p is a pointer to a constant

	remove_const(p);

	return 0;
}

void remove_const(const float *p) {
	float *q = (float *) p;
	// float *s = static_cast<float *> (p); // disallowed constness is lost

	*q = 4.5;

	cout << *q << endl;
}